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Brignoli T, Ferrara S, Bertoni G. Emerging In Vitro Models for the Study of Infection and Pathogenesis of Pseudomonas aeruginosa and Testing of Antibacterial Agents. Methods Mol Biol 2024; 2721:233-239. [PMID: 37819526 DOI: 10.1007/978-1-0716-3473-8_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Several animal models have been developed to study infection strategies and pathogenesis of Pseudomonas aeruginosa. Some of these models are also used in preclinical and clinical research. However, these models are increasingly showing their limitations, including in recapitulating human diseases such as cystic fibrosis, which is strongly linked to P. aeruginosa infection. The emerging field of human organoids and organs-on-a-chip is expected to provide answers to the need for in vitro modeling of human diseases. Here, we describe the first recent efforts that will hopefully provide the basis for the development of advanced in vitro models for the study of P. aeruginosa infection and pathogenesis and the testing of antibacterial agents.
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Affiliation(s)
- Tarcisio Brignoli
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Silvia Ferrara
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy
| | - Giovanni Bertoni
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy.
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2
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Santoro S, Bertoni G, Ferrara S. Fluorescence-based Evaluation of Cyclic di-GMP Levels in Pseudomonas aeruginosa. Methods Mol Biol 2024; 2721:45-54. [PMID: 37819514 DOI: 10.1007/978-1-0716-3473-8_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
The ability of Pseudomonas aeruginosa to establish chronic infections is associated with an effective switch from a motile to a sessile lifestyle. This proficiency is controlled by intracellular levels of the second messenger bis-(3'-5')-cyclic dimeric guanosine monophosphate (c-di-GMP). Targeting the c-di-GMP network could be a strategy to interfere with P. aeruginosa pathogenicity. Therefore, the development of tools to profile c-di-GMP intracellular levels is crucial. Here, we describe a protocol for the in vivo measurement of c-di-GMP levels in P. aeruginosa.
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Affiliation(s)
- Silvia Santoro
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Giovanni Bertoni
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy
| | - Silvia Ferrara
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy.
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3
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Ferrara S, Bertoni G. Genome-Scale Analysis of the Structure and Function of RNA Pathways and Networks in Pseudomonas aeruginosa. Methods Mol Biol 2024; 2721:183-195. [PMID: 37819523 DOI: 10.1007/978-1-0716-3473-8_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
In recent years, several genome-wide approaches based on RNA sequencing (RNA-seq) have been developed. These methods allow a comprehensive and dynamic view of the structure and function of the multi-layered RNA pathways and networks. Many of these approaches, including the promising one of single-cell transcriptome analysis, have been successfully applied to Pseudomonas aeruginosa. However, we are only at the beginning because only a few surrounding conditions have been considered. Here, we aim to illustrate the different types of approaches based on RNA-seq that will lead us in the future to a better understanding of the dynamics of RNA biology in P. aeruginosa.
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Affiliation(s)
- Silvia Ferrara
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy
| | - Giovanni Bertoni
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy.
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4
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Santoro S, Bertoni G, Ferrara S. A Pseudomonas aeruginosa-Suitable Fluorescent Reporter System for Analyzing Small RNA-Mediated Regulation of Target mRNAs. Methods Mol Biol 2024; 2721:69-83. [PMID: 37819516 DOI: 10.1007/978-1-0716-3473-8_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Bacterial small RNAs have emerged as modulators that play key roles in regulatory networks related to viability, environmental adaptation, and pathogenesis. Small RNAs can modulate gene expression by base-pairing to target mRNAs, influencing their translation and/or stability. A superfolder GFP reporter system, previously developed for Escherichia coli and Salmonella enterica, was adapted to Pseudomonas aeruginosa and used to validate novel mRNA targets in studies of small RNA-mediated regulatory mechanisms.
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Affiliation(s)
- Silvia Santoro
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Giovanni Bertoni
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy
| | - Silvia Ferrara
- Department of Biosciences, Università degli Studi di Milano, Milan, Milano, Italy.
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5
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Muzzi B, Albino M, Petrecca M, Innocenti C, de Julián Fernández C, Bertoni G, Ibarra MR, Christensen M, Avdeev M, Marquina C, Sangregorio C. Defect-Engineering by Solvent Mediated Mild Oxidation as a Tool to Induce Exchange Bias in Metal Doped Ferrites. Small Methods 2023; 7:e2300647. [PMID: 37649220 DOI: 10.1002/smtd.202300647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 07/22/2023] [Indexed: 09/01/2023]
Abstract
The crystal site occupancy of different divalent ions and the induction of lattice defects represent an additional tool for modifying the intrinsic magnetic properties of spinel ferrites nanoparticles. Here, the relevance of the lattice defects is demonstrated in the appearance of exchange-bias and in the improvement of the magnetic properties of doped ferrites of 20 nm, obtained from the mild oxidation of core@shell (wüstite@ferrite) nanoparticles. Three types of nanoparticles (Fe0.95 O@Fe3 O4 , Co0.3 Fe0.7 O@Co0.8 Fe2.2 O4 and Ni0.17 Co0.21 Fe0.62 O@Ni0.4 Co0.3 Fe2.3 O4 ) are oxidized. As a result, the core@shell morphology is removed and transformed in a spinel-like nanoparticle, through a topotactic transformation. This study shows that most of the induced defects in these nanoparticles and their magnetic properties are driven by the inability of the Co(II) ions at the octahedral sites to migrate to tetrahedral sites, at the chosen mild oxidation temperature. In addition, the appearance of crystal defects and antiphase boundaries improves the magnetic properties of the starting compounds and leads to the appearance of exchange bias at room temperature. These results highlight the validity of the proposed method to impose novel magnetic characteristics in the technologically relevant class of nanomaterials such as spinel ferrites, expanding their potential exploitation in several application fields.
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Affiliation(s)
- Beatrice Muzzi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, I-53100, Italy
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino (FI), I-50019, Italy
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - Martin Albino
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - Michele Petrecca
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - Claudia Innocenti
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino (FI), I-50019, Italy
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
| | - César de Julián Fernández
- Istituto dei Materiali per l' Elettronica ed il Magnetismo (IMEM), Consiglio Nazionale delle Ricerche(CNR), Parma, I-43124, Italy
| | | | - M Ricardo Ibarra
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, Zaragoza, 50009, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, Zaragoza, 50009, Spain
- Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Mogens Christensen
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus C, DK-8000, Denmark
| | - Maxim Avdeev
- Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Road, Lucas Heights, NSW, 2234, Australia
- School of Chemistry, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Clara Marquina
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, Zaragoza, 50009, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Claudio Sangregorio
- Istituto di Chimica dei Composti Organometallici (ICCOM), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino (FI), I-50019, Italy
- Department of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino, (FI), I-50019, Italy
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6
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Ferrara S, Brignoli T, Bertoni G. Little reason to call them small noncoding RNAs. Front Microbiol 2023; 14:1191166. [PMID: 37455713 PMCID: PMC10339803 DOI: 10.3389/fmicb.2023.1191166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 06/14/2023] [Indexed: 07/18/2023] Open
Abstract
Hundreds of different species of small RNAs can populate a bacterial cell. This small transcriptome contains important information for the adaptation of cellular physiology to environmental changes. Underlying cellular networks involving small RNAs are RNA-RNA and RNA-protein interactions, which are often intertwined. In addition, small RNAs can function as mRNAs. In general, small RNAs are referred to as noncoding because very few are known to contain translated open reading frames. In this article, we intend to highlight that the number of small RNAs that fall within the set of translated RNAs is bound to increase. In addition, we aim to emphasize that the dynamics of the small transcriptome involve different functional codes, not just the genetic code. Therefore, since the role of small RNAs is always code-driven, we believe that there is little reason to continue calling them small noncoding RNAs.
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7
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Bertoni G, Rotunno E, Marsmans D, Tiemeijer P, Tavabi AH, Dunin-Borkowski RE, Grillo V. Near-real-time diagnosis of electron optical phase aberrations in scanning transmission electron microscopy using an artificial neural network. Ultramicroscopy 2023; 245:113663. [PMID: 36566529 DOI: 10.1016/j.ultramic.2022.113663] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 10/17/2022] [Accepted: 12/17/2022] [Indexed: 12/23/2022]
Abstract
The key to optimizing spatial resolution in a state-of-the-art scanning transmission electron microscope is the ability to measure and correct for electron optical aberrations of the probe-forming lenses precisely. Several diagnostic methods for aberration measurement and correction have been proposed, albeit often at the cost of relatively long acquisition times. Here, we illustrate how artificial intelligence can be used to provide near-real-time diagnosis of aberrations from individual Ronchigrams. The demonstrated speed of aberration measurement is important because microscope conditions can change rapidly. It is also important for the operation of MEMS-based hardware correction elements, which have less intrinsic stability than conventional electromagnetic lenses.
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Affiliation(s)
- Giovanni Bertoni
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via G. Campi 213/A, 41125 Modena, Italy.
| | - Enzo Rotunno
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via G. Campi 213/A, 41125 Modena, Italy.
| | - Daan Marsmans
- Thermo Fisher Scientific, PO Box 80066, 5600 KA Eindhoven, the Netherlands
| | - Peter Tiemeijer
- Thermo Fisher Scientific, PO Box 80066, 5600 KA Eindhoven, the Netherlands
| | - Amir H Tavabi
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Rafal E Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Vincenzo Grillo
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via G. Campi 213/A, 41125 Modena, Italy
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8
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Fasola E, Alboreggia G, Pieraccini S, Oliva F, Agharbaoui FE, Bollati M, Bertoni G, Recchia S, Marelli M, Piarulli U, Pellegrino S, Gazzola S. Conformational switch and multiple supramolecular structures of a newly identified self-assembling protein-mimetic peptide from Pseudomonas aeruginosa YeaZ protein. Front Chem 2022; 10:1038796. [PMID: 36583150 PMCID: PMC9792601 DOI: 10.3389/fchem.2022.1038796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/29/2022] [Indexed: 12/15/2022] Open
Abstract
Protein-mimetic peptides (PMPs) are shorter sequences of self-assembling proteins, that represent remarkable building blocks for the generation of bioinspired functional supramolecular structures with multiple applications. The identification of novel aminoacidic sequences that permit the access to valuable biocompatible materials is an attractive area of research. In this work, in silico analysis of the Pseudomonas aeruginosa YeaZ protein (PaYeaZ) led to the identification of a tetradecapeptide that represents the shortest sequence responsible for the YeaZ-YeaZ dimer formation. Based on its sequence, an innovative 20-meric peptide, called PMP-2, was designed, synthesized, and characterized in terms of secondary structure and self-assembly properties. PMP-2 conserves a helical character and self-assembles into helical nanofibers in non-polar solvents (DMSO and trifluoroethanol), as well as in dilute (0.5 mM) aqueous solutions. In contrast, at higher concentrations (>2 mM) in water, a conformational transition from α-helix to β-sheet occurs, which is accompanied by the Protein-mimetic peptide aggregation into 2D-sheets and formation supramolecular gel in aqueous environment. Our findings reveal a newly identified Protein-mimetic peptide that could turn as a promising candidate for future material applications.
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Affiliation(s)
- Elettra Fasola
- Science and High Technology Department, University of Insubria, Como, Italy
| | - Giulia Alboreggia
- Science and High Technology Department, University of Insubria, Como, Italy
| | | | | | | | - Michela Bollati
- CNR and Department of Biosciences, Institute of Biophysics, University of Milan, Milan, Italy
| | | | - Sandro Recchia
- Science and High Technology Department, University of Insubria, Como, Italy
| | - Marcello Marelli
- CNR-SCITEC—Istituto di Scienze e Tecnologie Chimiche “Giulio Natta”, Milan, Italy
| | - Umberto Piarulli
- Science and High Technology Department, University of Insubria, Como, Italy,*Correspondence: Umberto Piarulli, ; Silvia Gazzola,
| | - Sara Pellegrino
- Pharmaceutical Science Department, University of Milan, Milan, Italy
| | - Silvia Gazzola
- Science and High Technology Department, University of Insubria, Como, Italy,*Correspondence: Umberto Piarulli, ; Silvia Gazzola,
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9
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Janovick N, Trevisi E, Bertoni G, Dann H, Drackley J. Prepartum plane of energy intake affects serum biomarkers for inflammation and liver function during the periparturient period. J Dairy Sci 2022; 106:168-186. [DOI: 10.3168/jds.2022-22286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 08/16/2022] [Indexed: 11/17/2022]
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10
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Muzzi B, Lottini E, Yaacoub N, Peddis D, Bertoni G, de Julián Fernández C, Sangregorio C, López-Ortega A. Hardening of Cobalt Ferrite Nanoparticles by Local Crystal Strain Release: Implications for Rare Earth Free Magnets. ACS Appl Nano Mater 2022; 5:14871-14881. [PMID: 36338325 PMCID: PMC9624260 DOI: 10.1021/acsanm.2c03161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/01/2022] [Indexed: 06/16/2023]
Abstract
In this work, we demonstrate that the reduction of the local internal stress by a low-temperature solvent-mediated thermal treatment is an effective post-treatment tool for magnetic hardening of chemically synthesized nanoparticles. As a case study, we used nonstoichiometric cobalt ferrite particles of an average size of 32(8) nm synthesized by thermal decomposition, which were further subjected to solvent-mediated annealing at variable temperatures between 150 and 320 °C in an inert atmosphere. The postsynthesis treatment produces a 50% increase of the coercive field, without affecting neither the remanence ratio nor the spontaneous magnetization. As a consequence, the energy product and the magnetic energy storage capability, key features for applications as permanent magnets and magnetic hyperthermia, can be increased by ca. 70%. A deep structural, morphological, chemical, and magnetic characterization reveals that the mechanism governing the coercive field improvement is the reduction of the concomitant internal stresses induced by the low-temperature annealing postsynthesis treatment. Furthermore, we show that the medium where the mild annealing process occurs is essential to control the final properties of the nanoparticles because the classical annealing procedure (T > 350 °C) performed on a dried powder does not allow the release of the lattice stress, leading to the reduction of the initial coercive field. The strategy here proposed, therefore, constitutes a method to improve the magnetic properties of nanoparticles, which can be particularly appealing for those materials, as is the case of cobalt ferrite, currently investigated as building blocks for the development of rare-earth free permanent magnets.
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Affiliation(s)
- Beatrice Muzzi
- Department
of Biotechnology, Chemistry and Pharmacy, University of Siena 1240, I-53100Siena, Italy
- ICCOM−CNR, I-50019Sesto Fiorentino, Italy
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
| | - Elisabetta Lottini
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
| | - Nader Yaacoub
- IMMM,
Université du Mans, CNRS UMR-6283, F-72085Le Mans, France
| | - Davide Peddis
- Department
of Chemistry and Industrial Chemistry, University
of Genoa, I-16146Genova, Italy
- ISM−CNR, I-00015Monterotondo
Scalo, Italy
| | | | | | - Claudio Sangregorio
- ICCOM−CNR, I-50019Sesto Fiorentino, Italy
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
| | - Alberto López-Ortega
- Department
of Chemistry “U. Schiff”, University of Florence and INSTM, I-50019Sesto Fiorentino, Italy
- Departamento
de Ciencias, Universidad Pública
de Navarra, E-31006Pamplona, Spain
- Institute
for Advanced Materials and Mathematics, Universidad Pública de Navarra, E-31006Pamplona, Spain
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Morenghi A, Scaravonati S, Magnani G, Sidoli M, Aversa L, Verucchi R, Bertoni G, Riccò M, Pontiroli D. Asymmetric supercapacitors based on nickel decorated graphene and porous graphene electrodes. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Muzzi B, Albino M, Petrecca M, Innocenti C, Fernández CDJ, Bertoni G, Marquina C, Ibarra MR, Sangregorio C. 3d Metal Doping of Core@Shell Wüstite@ferrite Nanoparticles as a Promising Route toward Room Temperature Exchange Bias Magnets. Small 2022; 18:e2107426. [PMID: 35274450 DOI: 10.1002/smll.202107426] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Nanometric core@shell wüstite@ferrite (Fe1-x O@Fe3 O4 ) has been extensively studied because of the emergence of exchange bias phenomena. Since their actual implementation in modern technologies is hampered by the low temperature at which bias is operating, the critical issue to be solved is to obtain exchange-coupled antiferromagnetic@ferrimagnetic nanoparticles (NPs) with ordering temperature close to 300 K by replacing the divalent iron with other transition-metal ions. Here, the effect of the combined substitution of Fe(II) with Co(II) and Ni(II) on the crystal structure and magnetic properties is studied. To this aim, a series of 20 nm NPs with a wüstite-based core and a ferrite shell, with tailored composition, (Co0.3 Fe0.7 O@Co0.8 Fe2.2 O4 and Ni0.17 Co0.21 Fe0.62 O@Ni0.4 Co0.3 Fe2.3 O4 ) is synthetized through a thermal-decomposition method. An extensive morphological and crystallographic characterization of the obtained NPs shows how a higher stability against the oxidation process in ambient condition is attained when divalent cation doping of the iron oxide lattice with Co(II) and Ni(II) ions is performed. The dual-doping is revealed to be an efficient way for tuning the magnetic properties of the final system, obtaining Ni-Co doped iron oxide core@shell NPs with high coercivity (and therefore, high energy product), and increased antiferromagnetic ordering transition temperature, close to room temperature.
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Affiliation(s)
- Beatrice Muzzi
- Departament of Biotechnology, Chemistry and Pharmacy, University of Siena 1240, Siena, I-53100, Italy
- ICCOM - CNR, Sesto Fiorentino FI, I-50019, Italy
- Departament of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino FI, I-50019, Italy
| | - Martin Albino
- Departament of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino FI, I-50019, Italy
| | - Michele Petrecca
- Departament of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino FI, I-50019, Italy
| | - Claudia Innocenti
- ICCOM - CNR, Sesto Fiorentino FI, I-50019, Italy
- Departament of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino FI, I-50019, Italy
| | | | | | - Clara Marquina
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, Zaragoza, 50009, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Manuel Ricardo Ibarra
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, Zaragoza, 50009, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, Zaragoza, 50009, Spain
- Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, Zaragoza, 50018, Spain
| | - Claudio Sangregorio
- ICCOM - CNR, Sesto Fiorentino FI, I-50019, Italy
- Departament of Chemistry "U. Schiff", University of Florence and INSTM, Sesto Fiorentino FI, I-50019, Italy
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13
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Paolella A, Bertoni G, Zhu W, Campanella D, La Monaca A, Girard G, Demers H, Gheorghe Nita AC, Feng Z, Vijh A, Guerfi A, Trudeau M, Armand M, Krachkovskiy SA. Unveiling the Cation Exchange Reaction between the NASICON Li 1.5Al 0.5Ge 1.5(PO 4) 3 Solid Electrolyte and the pyr13TFSI Ionic Liquid. J Am Chem Soc 2022; 144:3442-3448. [PMID: 35171584 DOI: 10.1021/jacs.1c11466] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recently, the formation of the ceramic-ionic liquid composite has attracted huge interest in the scientific community. In this work, we investigated the chemical reactions occurring between NASICON LAGP ceramic electrolyte and ionic liquid pyr13TFSI. This study allowed us to identify the cation exchange reaction pyr13-Li occurring on the LAGP surface, forming a LiTFSI salt that was detected by the nuclear magnetic resonance analysis. In addition, using 6Li foils, we succeeded in demonstrating that both LAGP and LiTFSI:pyr13TFSI participate in the diffusion of Li ions by the formation of an ionic bridge between two species.
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Affiliation(s)
- Andrea Paolella
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Giovanni Bertoni
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via Campi 213/A, 41125 Modena, Italy
| | - Wen Zhu
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Daniele Campanella
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Andrea La Monaca
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Gabriel Girard
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Hendrix Demers
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Alina Cristina Gheorghe Nita
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Zimin Feng
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Ashok Vijh
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Abdelbast Guerfi
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Michel Trudeau
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
| | - Michel Armand
- CIC Energigune, Parque Tecnológico de Álava, Albert Einstein, 48, 01510 Vitoria-Gasteiz, Álava, Spain
| | - Sergey A Krachkovskiy
- Hydro-Québec, Center of Excellence in Transportation Electrification and Energy Storage, 1806 Boulevard Lionel Boulet, Varennes, Québec J0L 1N0, Canada
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14
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Ferrara S, Carrubba R, Santoro S, Bertoni G. The Small RNA ErsA Impacts the Anaerobic Metabolism of Pseudomonas aeruginosa Through Post-Transcriptional Modulation of the Master Regulator Anr. Front Microbiol 2021; 12:691608. [PMID: 34759894 PMCID: PMC8575079 DOI: 10.3389/fmicb.2021.691608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 07/27/2021] [Indexed: 01/05/2023] Open
Abstract
Pseudomonas aeruginosa is one of the most critical opportunistic pathogens in humans, able to cause both lethal acute and chronic lung infections. In previous work, we indicated that the small RNA ErsA plays a role in the regulatory network of P. aeruginosa pathogenicity in airways infection. To give further insight into the lifestyle functions that could be either directly or indirectly regulated by ErsA during infection, we reanalyzed the categories of genes whose transcription appeared dysregulated in an ersA knock-out mutant of the P. aeruginosa PAO1 reference strain. This preliminary analysis indicated ErsA as a candidate co-modulator of denitrification and in general, the anaerobiosis response, a characteristic physiologic state of P. aeruginosa during chronic infection of the lung of cystic fibrosis (CF) patients. To explain the pattern of dysregulation of the anaerobic-lifestyle genes in the lack of ErsA, we postulated that ErsA regulation could target the expression of Anr, a well-known transcription factor that modulates a broad regulon of anoxia-responsive genes, and also Dnr, required for the transcription activation of the denitrification machinery. Our results show that ErsA positively regulates Anr expression at the post-transcriptional level while no direct ErsA-mediated regulatory effect on Dnr was observed. However, Dnr is transcriptionally downregulated in the absence of ErsA and this is consistent with the well-characterized regulatory link between Anr and Dnr. Anr regulatory function is critical for P. aeruginosa anaerobic growth, both through denitrification and fermentation of arginine. Interestingly, we found that, differently from the laboratory strain PAO1, ErsA deletion strongly impairs the anaerobic growth by both denitrification and arginine fermentation of the RP73 clinical isolate, a multi-drug resistant P. aeruginosa CF-adapted strain. This suggests that P. aeruginosa adaptation to CF lung might result in a higher dependence on ErsA for the transduction of the multiple signals to the regulatory network of key functions for survivance in such a complex environment. Together, our results suggest that ErsA takes an upper place in the regulatory network of airways infection, transducing host inputs to biofilm-related factors, as underlined in our previous reports, and to functions that allow P. aeruginosa to thrive in low-oxygen conditions.
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Affiliation(s)
- Silvia Ferrara
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Riccardo Carrubba
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Silvia Santoro
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
| | - Giovanni Bertoni
- Department of Biosciences, Università degli Studi di Milano, Milan, Italy
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15
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Caleffi M, Mariani P, Bertoni G, Paolicelli G, Pasquali L, Agresti A, Pescetelli S, Di Carlo A, De Renzi V, D’Addato S. Ag/MgO Nanoparticles via Gas Aggregation Nanocluster Source for Perovskite Solar Cell Engineering. Materials (Basel) 2021; 14:ma14195507. [PMID: 34639901 PMCID: PMC8509757 DOI: 10.3390/ma14195507] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/18/2021] [Accepted: 09/21/2021] [Indexed: 11/25/2022]
Abstract
Nanocluster aggregation sources based on magnetron-sputtering represent precise and versatile means to deposit a controlled quantity of metal nanoparticles at selected interfaces. In this work, we exploit this methodology to produce Ag/MgO nanoparticles (NPs) and deposit them on a glass/FTO/TiO2 substrate, which constitutes the mesoscopic front electrode of a monolithic perovskite-based solar cell (PSC). Herein, the Ag NP growth through magnetron sputtering and gas aggregation, subsequently covered with MgO ultrathin layers, is fully characterized in terms of structural and morphological properties while thermal stability and endurance against air-induced oxidation are demonstrated in accordance with PSC manufacturing processes. Finally, once the NP coverage is optimized, the Ag/MgO engineered PSCs demonstrate an overall increase of 5% in terms of device power conversion efficiencies (up to 17.8%).
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Affiliation(s)
- Matteo Caleffi
- Dipartimento di Scienze Fisiche, Matematiche e Informatiche, Università di Modena e Reggio Emilia, Via Campi 213/A, 41125 Modena, Italy; (V.D.R.); (S.D.)
- Correspondence: (M.C.); (A.A.)
| | - Paolo Mariani
- CHOSE—Centre for Hybrid and Organic Solar Energy, Department of Electronics Engineering, University of Rome Tor Vergata, 00133 Rome, Italy; (P.M.); (S.P.); (A.D.C.)
| | - Giovanni Bertoni
- CNR—Consiglio Nazionale delle Ricerche, Istituto Nanoscienze, Via Campi 213/A, 41125 Modena, Italy; (G.B.); (G.P.)
- IMEM—CNR, Istituto dei Materiali per l’Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche, Parco Area delle Scienze 37/A, 43124 Parma, Italy
| | - Guido Paolicelli
- CNR—Consiglio Nazionale delle Ricerche, Istituto Nanoscienze, Via Campi 213/A, 41125 Modena, Italy; (G.B.); (G.P.)
| | - Luca Pasquali
- Dipartimento di Ingegneria E. Ferrari, Università di Modena e Reggio Emilia, Via Vivarelli 10, 41125 Modena, Italy;
- IOM—CNR, Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, s.s. 14, Km. 163.5 in AREA Science Park, Basovizza, 34149 Trieste, Italy
- Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa
| | - Antonio Agresti
- CHOSE—Centre for Hybrid and Organic Solar Energy, Department of Electronics Engineering, University of Rome Tor Vergata, 00133 Rome, Italy; (P.M.); (S.P.); (A.D.C.)
- Correspondence: (M.C.); (A.A.)
| | - Sara Pescetelli
- CHOSE—Centre for Hybrid and Organic Solar Energy, Department of Electronics Engineering, University of Rome Tor Vergata, 00133 Rome, Italy; (P.M.); (S.P.); (A.D.C.)
| | - Aldo Di Carlo
- CHOSE—Centre for Hybrid and Organic Solar Energy, Department of Electronics Engineering, University of Rome Tor Vergata, 00133 Rome, Italy; (P.M.); (S.P.); (A.D.C.)
- ISM—CNR, Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, 00133 Rome, Italy
| | - Valentina De Renzi
- Dipartimento di Scienze Fisiche, Matematiche e Informatiche, Università di Modena e Reggio Emilia, Via Campi 213/A, 41125 Modena, Italy; (V.D.R.); (S.D.)
- CNR—Consiglio Nazionale delle Ricerche, Istituto Nanoscienze, Via Campi 213/A, 41125 Modena, Italy; (G.B.); (G.P.)
| | - Sergio D’Addato
- Dipartimento di Scienze Fisiche, Matematiche e Informatiche, Università di Modena e Reggio Emilia, Via Campi 213/A, 41125 Modena, Italy; (V.D.R.); (S.D.)
- CNR—Consiglio Nazionale delle Ricerche, Istituto Nanoscienze, Via Campi 213/A, 41125 Modena, Italy; (G.B.); (G.P.)
- EN & TECH, Università di Modena e Reggio Emilia, 41125 Modena, Italy
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16
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Brescia R, Toso S, Ramasse Q, Manna L, Shamsi J, Downing C, Calzolari A, Bertoni G. Bandgap determination from individual orthorhombic thin cesium lead bromide nanosheets by electron energy-loss spectroscopy. Nanoscale Horiz 2020; 5:1610-1617. [PMID: 33140817 DOI: 10.1039/d0nh00477d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Inorganic lead halide perovskites are promising candidates for optoelectronic applications, due to their high photoluminescence quantum yield and narrow emission line widths. Particularly attractive is the possibility to vary the bandgap as a function of the halide composition and the size or shape of the crystals at the nanoscale. Here we present an aberration-corrected scanning transmission electron microscopy (STEM) and monochromated electron energy-loss spectroscopy (EELS) study of extended nanosheets of CsPbBr3. We demonstrate their orthorhombic crystal structure and their lateral termination with Cs-Br planes. The bandgaps are measured from individual nanosheets, avoiding the effect of the size distribution which is present in standard optical spectroscopy techniques. We find an increase of the bandgap starting at thicknesses below 10 nm, confirming the less marked effect of 1D confinement in nanosheets compared to the 3D confinement observed in quantum dots, as predicted by density functional theory calculations and optical spectroscopy data from ensemble measurements.
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Affiliation(s)
- Rosaria Brescia
- Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Stefano Toso
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy and International Doctoral Program in Science, Università Cattolica del Sacro Cuore, 25121 Brescia, Italy
| | - Quentin Ramasse
- SuperSTEM, SciTech Daresbury Science and Innovation Campus, Keckwick Lane, Daresbury WA4 4AD, UK. and School of Chemical and Process Engineering & School of Physics, University of Leeds, Leeds LS29JT, UK
| | - Liberato Manna
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Javad Shamsi
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Clive Downing
- The Advanced Microscopy Laboratory, CRANN, Trinity College Dublin (TCD), Dublin, Ireland
| | - Arrigo Calzolari
- CNR - Istituto Nanoscienze, Via Campi 213/A, 41125 Modena, Italy.
| | - Giovanni Bertoni
- CNR - Istituto Nanoscienze, Via Campi 213/A, 41125 Modena, Italy. and IMEM - CNR, Istituto dei Materiali per l'Elettronica e il Magnetismo, Parco Area delle Scienze 37/A, 43124 Parma, Italy
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17
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Martínez-García E, Fraile S, Rodríguez Espeso D, Vecchietti D, Bertoni G, de Lorenzo V. Naked Bacterium: Emerging Properties of a Surfome-Streamlined Pseudomonas putida Strain. ACS Synth Biol 2020; 9:2477-2492. [PMID: 32786355 DOI: 10.1021/acssynbio.0c00272] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Environmental bacteria are most often endowed with native surface-attachment programs that frequently conflict with efforts to engineer biofilms and synthetic communities with given tridimensional architectures. In this work, we report the editing of the genome of Pseudomonas putida KT2440 for stripping the cells of most outer-facing structures of the bacterial envelope that mediate motion, binding to surfaces, and biofilm formation. To this end, 23 segments of the P. putida chromosome encoding a suite of such functions were deleted, resulting in the surface-naked strain EM371, the physical properties of which changed dramatically in respect to the wild type counterpart. As a consequence, surface-edited P. putida cells were unable to form biofilms on solid supports and, because of the swimming deficiency and other alterations, showed a much faster sedimentation in liquid media. Surface-naked bacteria were then used as carriers of interacting partners (e.g., Jun-Fos domains) ectopically expressed by means of an autotransporter display system on the now easily accessible cell envelope. Abstraction of individual bacteria as adhesin-coated spherocylinders enabled rigorous quantitative description of the multicell interplay brought about by thereby engineered physical interactions. The model was then applied to parametrize the data extracted from automated analysis of confocal microscopy images of the experimentally assembled bacterial flocks for analyzing their structure and distribution. The resulting data not only corroborated the value of P. putida EM371 over the parental strain as a platform for display artificial adhesins but also provided a strategy for rational engineering of catalytic communities.
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Affiliation(s)
- Esteban Martínez-García
- Systems Biology Program, Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, 28049 Madrid, Spain
| | - Sofía Fraile
- Systems Biology Program, Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, 28049 Madrid, Spain
| | - David Rodríguez Espeso
- Systems Biology Program, Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, 28049 Madrid, Spain
| | - Davide Vecchietti
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Giovanni Bertoni
- Department of Biosciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Víctor de Lorenzo
- Systems Biology Program, Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, 28049 Madrid, Spain
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18
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Muzzi B, Albino M, Innocenti C, Petrecca M, Cortigiani B, Fernández CDJ, Bertoni G, Fernandez-Pacheco R, Ibarra A, Marquina C, Ibarra MR, Sangregorio C. Unraveling the mechanism of the one-pot synthesis of exchange coupled Co-based nano-heterostructures with a high energy product. Nanoscale 2020; 12:14076-14086. [PMID: 32583829 DOI: 10.1039/d0nr01361g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The development of reproducible protocols to synthesize hard/soft nano-heterostructures (NHSs) with tailored magnetic properties is a crucial step to define their potential application in a variety of technological areas. Thermal decomposition has proved to be an effective tool to prepare such systems, but it has been scarcely used so far for the synthesis of Co-based metal/ferrite NHSs, despite their intriguing physical properties. We found a new approach to prepare this kind of nanomaterial based on a simple one-pot thermal decomposition reaction of metal-oleate precursors in the high boiling solvent docosane. The obtained NHSs are characterized by the coexistence of Co metal and Co doped magnetite and are highly stable in an air atmosphere, thanks to the passivation of the metal with a very thin oxide layer. The investigation of the influence of the metal precursor composition (a mixed iron-cobalt oleate), of the ligands (oleic acid and sodium oleate) and of the reaction time on the chemical and structural characteristics of the final product, allowed us to rationalize the reaction pathway and to determine the role of each parameter. In particular, the use of sodium oleate is crucial to obtain a metal phase in the NHSs. In such a way, the one-pot approach proposed here allows the fine control of the synthesis, leading to the formation of stable, high performant, metal/ferrite NHSs with tailored magnetic properties. For instance, the room temperature maximum energy product was increased up to 19 kJ m-3 by tuning the Co content in the metal precursor.
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Affiliation(s)
- Beatrice Muzzi
- Dept. of Biotechnology, Chemistry and Pharmacy, University of Siena 1240, I-53100 Siena, Italy and ICCOM - CNR, I-50019 Sesto Fiorentino (FI), Italy. and Dept. of Chemistry "U. Schiff", University of Florence and INSTM, I-50019 Sesto Fiorentino (FI), Italy
| | - Martin Albino
- Dept. of Chemistry "U. Schiff", University of Florence and INSTM, I-50019 Sesto Fiorentino (FI), Italy
| | - Claudia Innocenti
- ICCOM - CNR, I-50019 Sesto Fiorentino (FI), Italy. and Dept. of Chemistry "U. Schiff", University of Florence and INSTM, I-50019 Sesto Fiorentino (FI), Italy
| | - Michele Petrecca
- ICCOM - CNR, I-50019 Sesto Fiorentino (FI), Italy. and Dept. of Chemistry "U. Schiff", University of Florence and INSTM, I-50019 Sesto Fiorentino (FI), Italy
| | - Brunetto Cortigiani
- Dept. of Chemistry "U. Schiff", University of Florence and INSTM, I-50019 Sesto Fiorentino (FI), Italy
| | | | - Giovanni Bertoni
- IMEM - CNR, I-43124 Parma, Italy and CNR - Istituto Nanoscienze, I-41125 Modena, Italy
| | - Rodrigo Fernandez-Pacheco
- Dpto. de Física de la Materia Condensada, Universidad de Zaragoza, 50009-Zaragoza, Spain and Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018-Zaragoza, Spain and Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018-Zaragoza, Spain
| | - Alfonso Ibarra
- Dpto. de Física de la Materia Condensada, Universidad de Zaragoza, 50009-Zaragoza, Spain and Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018-Zaragoza, Spain and Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018-Zaragoza, Spain
| | - Clara Marquina
- Instituto de Ciencia de Materiales de Aragón (ICMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, 50009-Zaragoza, Spain and Dpto. de Física de la Materia Condensada, Universidad de Zaragoza, 50009-Zaragoza, Spain
| | - M Ricardo Ibarra
- Instituto de Ciencia de Materiales de Aragón (ICMA), Consejo Superior de Investigaciones Científicas (CSIC)-Universidad de Zaragoza, 50009-Zaragoza, Spain and Dpto. de Física de la Materia Condensada, Universidad de Zaragoza, 50009-Zaragoza, Spain and Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, 50018-Zaragoza, Spain and Laboratorio de Microscopias Avanzadas (LMA), Universidad de Zaragoza, 50018-Zaragoza, Spain
| | - Claudio Sangregorio
- ICCOM - CNR, I-50019 Sesto Fiorentino (FI), Italy. and Dept. of Chemistry "U. Schiff", University of Florence and INSTM, I-50019 Sesto Fiorentino (FI), Italy
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19
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Pelli Cresi JS, Silvagni E, Bertoni G, Spadaro MC, Benedetti S, Valeri S, D'Addato S, Luches P. Optical and electronic properties of silver nanoparticles embedded in cerium oxide. J Chem Phys 2020; 152:114704. [PMID: 32199417 DOI: 10.1063/1.5142528] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Wide bandgap oxides can be sensitized to visible light by coupling them with plasmonic nanoparticles (NPs). We investigate the optical and electronic properties of composite materials made of Ag NPs embedded within cerium oxide layers of different thickness. The electronic properties of the materials are investigated by x-ray and ultraviolet photoemission spectroscopy, which demonstrates the occurrence of static charge transfers between the metal and the oxide and its dependence on the NP size. Ultraviolet-visible spectrophotometry measurements show that the materials have a strong absorption in the visible range induced by the excitation of localized surface plasmon resonances. The plasmonic absorption band can be modified in shape and intensity by changing the NP aspect ratio and density and the thickness of the cerium oxide film.
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Affiliation(s)
- Jacopo Stefano Pelli Cresi
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 213/a, 41125 Modena, Italy
| | - Enrico Silvagni
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 213/a, 41125 Modena, Italy
| | - Giovanni Bertoni
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via G. Campi 213/a, 41125 Modena, Italy
| | - Maria Chiara Spadaro
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 213/a, 41125 Modena, Italy
| | - Stefania Benedetti
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via G. Campi 213/a, 41125 Modena, Italy
| | - Sergio Valeri
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 213/a, 41125 Modena, Italy
| | - Sergio D'Addato
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 213/a, 41125 Modena, Italy
| | - Paola Luches
- Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via G. Campi 213/a, 41125 Modena, Italy
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20
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De Martin E, Golomingi A, Zahno M, Cachim J, Di Labio E, Perler L, Abril C, Zanoni R, Bertoni G. Diagnostic response to a cross-border challenge for the Swiss caprine arthritis encephalitis virus eradication program. SCHWEIZ ARCH TIERH 2019; 161:93-104. [PMID: 30696612 DOI: 10.17236/sat00196] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Animal trading between countries with different small ruminant lentivirus infectious status is a potential danger for the reintroduction of eradicated genotypes. This was the case in 2017 with the importation of a large flock of seropositive goats into Switzerland. The handling of this case permitted us to test the preventive measures in place. The coordination between the local veterinarian and the cantonal and federal veterinary authorities worked efficiently and rapidly involved the national reference center in the investigations. This case posed a challenge for the reference center and enabled scrutiny of the applied diagnostic tests. ELISA and western blot provided consistent results and pointed to an unusually high infection rate in the flock. This was confirmed by the isolation of several viruses from different organs and cells, demonstrating that the spleen is particularly well suited for isolation of small ruminant lentiviruses. The SU5-ELISA, designed to predict the subtype of the infecting virus, correctly pointed to a B1 subtype as the infectious agent. We confirmed that with this test it is necessary to analyze a representative number of samples from a flock and not just individual sera to obtain reliable results. This analysis permitted us to identify particular amino acid residues in the SU5 peptides that may be crucial in determining the subtype specificity of antibody binding. Different gag-pol and env regions were amplified by PCR using primers designed for this purpose. The phylogenetic analysis revealed a surprisingly high heterogeneity of the sequences, pointing to multiple infections within single animals and the entire flock. In conclusion, this case showed that the defense of the CAEV negative status of the Swiss goat population with respect to the virulent, prototypic B1 subtype of small ruminant lentiviruses, requires, among other measures, a diagnostic facility capable of performing a thorough analysis of the collected samples.
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Affiliation(s)
- E De Martin
- Institute of Virology and Immunology, Bern & Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern.,Graduate School for Cellular and Biomedical Sciences, University of Bern
| | - A Golomingi
- Institute of Virology and Immunology, Bern & Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern
| | - M Zahno
- Institute of Virology and Immunology, Bern & Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern
| | - J Cachim
- Santé animale, Département de l'économie, de l'innovation et du sport (DEIS) Direction générale de l'agriculture, de la viticulture et des affaires vétérinaires (DGAV), Epalinges, Switzerland
| | - E Di Labio
- Federal Food Safety and Veterinary Office FSVO, Bern
| | - L Perler
- Federal Food Safety and Veterinary Office FSVO, Bern
| | - C Abril
- Institute of Virology and Immunology, Bern & Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern
| | - R Zanoni
- Institute of Virology and Immunology, Bern & Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern
| | - G Bertoni
- Institute of Virology and Immunology, Bern & Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern
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21
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Pelli Cresi JS, Spadaro MC, D'Addato S, Valeri S, Benedetti S, Di Bona A, Catone D, Di Mario L, O'Keeffe P, Paladini A, Bertoni G, Luches P. Highly efficient plasmon-mediated electron injection into cerium oxide from embedded silver nanoparticles. Nanoscale 2019; 11:10282-10291. [PMID: 31099368 DOI: 10.1039/c9nr01390c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The coupling with plasmonic metal nanoparticles (NPs) represents a promising opportunity to sensitize wide band gap oxides to visible light. The processes which come into play after the excitation of localized surface plasmon resonances (LSPRs) in the NPs largely determine the efficiency of the charge/energy transfer from the metal NP to the oxide. We report a study of plasmon-mediated energy transfer from mass-selected silver NPs into the cerium oxide matrix in which they are embedded. Femtosecond transient absorption spectroscopy is used to probe the dynamics of charge carrier relaxation after the excitation of the LSPR of the silver nanoparticles and to evaluate the plasmon-mediated electron transfer efficiency from the silver nanoparticles to the cerium oxide. High injection efficiencies in the 6-16% range have been identified for excitation between 400 and 600 nm. These high values have been explained in terms of plasmon-mediated direct electron injection as well as indirect hot electron injection from the NPs to the oxide. The information obtained provides an important contribution towards a knowledge-driven design of efficient cerium oxide based nanostructured materials for solar to chemical energy conversion.
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22
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Uruburu M, Mastrangelo E, Bolognesi M, Ferrara S, Bertoni G, Milani M. Structural and functional characterization of TgpA, a critical protein for the viability of Pseudomonas aeruginosa. J Struct Biol 2019; 205:18-25. [PMID: 30599211 DOI: 10.1016/j.jsb.2018.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 12/06/2018] [Accepted: 12/07/2018] [Indexed: 11/29/2022]
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen associated with severe diseases, such as cystic fibrosis. During an extensive search for novel essential genes, we identified tgpA (locus PA2873) in P. aeruginosa PAO1, as a gene playing a critical role in bacterial viability. TgpA, the translated protein, is an internal membrane protein with a periplasmic soluble domain, predicted to be endowed with a transglutaminase-like fold, hosting the Cys404, His448, and Asp464 triad. We report here that Cys404 mutation hampers the essential role of TgpA in granting P. aeruginosa viability. Moreover, we present the crystal structure of the TgpA periplasmic domain at 1.6 Å resolution as a first step towards structure-activity analysis of a new potential target for the discovery of antibacterial compounds.
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Affiliation(s)
- Mónica Uruburu
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy
| | - Eloise Mastrangelo
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy; CNR-IBF, Istituto di Biofisica, Via Celoria 26, I-20133 Milano, Italy
| | - Martino Bolognesi
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy; Centro di Ricerca Pediatrica R.E. Invernizzi, Università di Milano, Via Celoria 26, I-20133 Milano, Italy
| | - Silvia Ferrara
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy
| | - Giovanni Bertoni
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy.
| | - Mario Milani
- Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy; CNR-IBF, Istituto di Biofisica, Via Celoria 26, I-20133 Milano, Italy.
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23
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Avossa J, Paolesse R, Di Natale C, Zampetti E, Bertoni G, De Cesare F, Scarascia-Mugnozza G, Macagnano A. Electrospinning of Polystyrene/Polyhydroxybutyrate Nanofibers Doped with Porphyrin and Graphene for Chemiresistor Gas Sensors. Nanomaterials (Basel) 2019; 9:E280. [PMID: 30781545 PMCID: PMC6409903 DOI: 10.3390/nano9020280] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 11/16/2022]
Abstract
Structural and functional properties of polymer composites based on carbon nanomaterials are so attractive that they have become a big challenge in chemical sensors investigation. In the present study, a thin nanofibrous layer, comprising two insulating polymers (polystyrene (PS) and polyhydroxibutyrate (PHB)), a known percentage of nanofillers of mesoporous graphitized carbon (MGC) and a free-base tetraphenylporphyrin, was deposited onto an Interdigitated Electrode (IDE) by electrospinning technology. The potentials of the working temperature to drive both the sensitivity and the selectivity of the chemical sensor were studied and described. The effects of the porphyrin combination with the composite graphene⁻polymer system appeared evident when nanofibrous layers, with and without porphyrin, were compared for their morphology and electrical and sensing parameters. Porphyrin fibers appeared smoother and thinner and were more resistive at lower temperature, but became much more conductive when temperature increased to 60⁻70 °C. Both adsorption and diffusion of chemicals seemed ruled by porphyrin according its combination inside the composite fiber, since the response rates dramatically increased (toluene and acetic acid). Finally, the opposite effect of the working temperature on the sensitivity of the porphyrin-doped fibers (i.e., increasing) and the porphyrin-free fibers (i.e., decreasing) seemed further confirmation of the key role of such a macromolecule in the VOC (volatile organic compound) adsorption.
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Affiliation(s)
- Joshua Avossa
- Institute of Atmospheric Pollution Research⁻National Research Council (IIA-CNR), Research Area of Rome 1, Via Salaria km 29.300, 00016 Monterotondo, Italy.
| | - Roberto Paolesse
- Institute of Atmospheric Pollution Research⁻National Research Council (IIA-CNR), Research Area of Rome 1, Via Salaria km 29.300, 00016 Monterotondo, Italy.
- Department of Chemical Science and Technology, University of Tor Vergata, Via della Ricerca Scientifica 00133 Rome, Italy.
| | - Corrado Di Natale
- Institute of Atmospheric Pollution Research⁻National Research Council (IIA-CNR), Research Area of Rome 1, Via Salaria km 29.300, 00016 Monterotondo, Italy.
- Department of Electronic Engineering, University of Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy.
| | - Emiliano Zampetti
- Institute of Atmospheric Pollution Research⁻National Research Council (IIA-CNR), Research Area of Rome 1, Via Salaria km 29.300, 00016 Monterotondo, Italy.
| | - Giovanni Bertoni
- Institute of Materials for Electronics and Magnetism⁻National Research Council (IMEM-CNR), Parco Area delle Scienze 37/A, 43124 Parma, Italy.
| | - Fabrizio De Cesare
- Institute of Atmospheric Pollution Research⁻National Research Council (IIA-CNR), Research Area of Rome 1, Via Salaria km 29.300, 00016 Monterotondo, Italy.
- Department for Innovation in Biological, Agro-food and Forest Systems (DIBAF), Via S. Camillo de Lellis, 00100 Viterbo, Italy.
| | - Giuseppe Scarascia-Mugnozza
- Department for Innovation in Biological, Agro-food and Forest Systems (DIBAF), Via S. Camillo de Lellis, 00100 Viterbo, Italy.
| | - Antonella Macagnano
- Institute of Atmospheric Pollution Research⁻National Research Council (IIA-CNR), Research Area of Rome 1, Via Salaria km 29.300, 00016 Monterotondo, Italy.
- Department for Innovation in Biological, Agro-food and Forest Systems (DIBAF), Via S. Camillo de Lellis, 00100 Viterbo, Italy.
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24
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Campanini M, Nasi L, Fabbrici S, Casoli F, Celegato F, Barrera G, Chiesi V, Bedogni E, Magén C, Grillo V, Bertoni G, Righi L, Tiberto P, Albertini F. Magnetic Shape Memory Turns to Nano: Microstructure Controlled Actuation of Free-Standing Nanodisks. Small 2018; 14:e1803027. [PMID: 30294862 DOI: 10.1002/smll.201803027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/12/2018] [Indexed: 06/08/2023]
Abstract
Magnetic shape memory materials hold a great promise for next-generation actuation devices and systems for energy conversion, thanks to the intimate coupling between structure and magnetism in their martensitic phase. Here novel magnetic shape memory free-standing nanodisks are proposed, proving that the lack of the substrate constrains enables the exploitation of new microstructure-controlled actuation mechanisms by the combined application of different stimuli-i.e., temperature and magnetic field. The results show that a reversible areal strain (up to 5.5%) can be achieved and tuned in intensity and sign (i.e., areal contraction or expansion) by the application of a magnetic field. The mechanisms at the basis of the actuation are investigated by experiments performed at different length scales and directly visualized by several electron microscopy techniques, including electron holography, showing that thermo/magnetomechanical properties can be optimized by engineering the martensitic microstructure through epitaxial growth and lateral confinement. These findings represent a step forward toward the development of a new class of temperature-field controlled nanoactuators and smart nanomaterials.
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Affiliation(s)
- Marco Campanini
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124, Parma, Italy
- Empa, Ueberlandstrasse 129, 8600, Dübendorf, Switzerland
| | - Lucia Nasi
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124, Parma, Italy
| | - Simone Fabbrici
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124, Parma, Italy
- MIST E-R, via P. Gobetti 101, 40129, Bologna, Italy
| | | | | | | | | | - Elena Bedogni
- Dipartimento di Scienze Chimiche, Università di Parma, 43121, Parma, Italy
| | - César Magén
- ICMA, Universidad de Zaragoza-CSIC, 50009, Zaragoza, Spain
- LMA, Instituto de Nanociencia de Aragón, Universidad de Zaragoza, 50018, Zaragoza, Spain
| | - Vincenzo Grillo
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124, Parma, Italy
- S3-CNR, Via Campi 213A, 41125, Modena, Italy
| | - Giovanni Bertoni
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124, Parma, Italy
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Lara Righi
- Dipartimento di Scienze Chimiche, Università di Parma, 43121, Parma, Italy
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25
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Mugnaioli E, Gemmi M, Rozhdestvenskaya IV, Czank M, Depmeier W, David J, Bertoni G, De Trizio L, Manna L. Crystallography at the order–disorder borderline: characterization of nanodomains by electron diffraction and imaging. Acta Crystallogr A Found Adv 2018. [DOI: 10.1107/s2053273318094421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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26
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Furst ML, Mykietiuk A, Pessacq P, Scapellato P, Clara L, Nemirovsky C, Otreras A, Martinez J, Gañete M, Bertoni G, Sandor A, Galvez M, Crespo A, Peralta M, Barberis F. Community-acquired uncomplicated urinary tract infections (UTI): current etiology and antimicrobial susceptibility in Argentina. A prospective, observational, multicentre study. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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27
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Mugnaioli E, Gemmi M, Tu R, David J, Bertoni G, Gaspari R, De Trizio L, Manna L. Ab Initio Structure Determination of Cu 2- xTe Plasmonic Nanocrystals by Precession-Assisted Electron Diffraction Tomography and HAADF-STEM Imaging. Inorg Chem 2018; 57:10241-10248. [PMID: 30063352 DOI: 10.1021/acs.inorgchem.8b01445] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
We investigated pseudo-cubic Cu2- xTe nanosheets using electron diffraction tomography and high-resolution HAADF-STEM imaging. The structure of this metastable nanomaterial, which has a strong localized surface plasmon resonance in the near-infrared region, was determined ab initio by 3D electron diffraction data recorded in low-dose nanobeam precession mode, using a new generation background-free single-electron detector. The presence of two different, crystallographically defined modulations creates a 3D connected vacancy channel system, which may account for the strong plasmonic response of this material. Moreover, a pervasive rotational twinning is observed for nanosheets as thin as 40 nm, resulting in a tetragonal pseudo-symmetry.
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Affiliation(s)
- Enrico Mugnaioli
- Center for Nanotechnology Innovation@NEST , Istituto Italiano di Tecnologia (IIT) , Piazza San Silvestro12 , 56127 Pisa , Italy
| | - Mauro Gemmi
- Center for Nanotechnology Innovation@NEST , Istituto Italiano di Tecnologia (IIT) , Piazza San Silvestro12 , 56127 Pisa , Italy
| | - Renyong Tu
- Department of Nanochemstry , Istituto Italiano di Tecnologia (IIT) , via Morego 30 , 16163 Genova , Italy.,Department of Chemistry , Tsinghua University , Beijing 100084 , China
| | - Jeremy David
- Center for Nanotechnology Innovation@NEST , Istituto Italiano di Tecnologia (IIT) , Piazza San Silvestro12 , 56127 Pisa , Italy.,Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST , Campus UAB, Bellaterra , 08193 Barcelona , Spain
| | - Giovanni Bertoni
- Department of Nanochemstry , Istituto Italiano di Tecnologia (IIT) , via Morego 30 , 16163 Genova , Italy.,IMEM - CNR, Institute of Materials for Electronics and Magnetism , Parco Area delle Scienze 37/A , I-43124 Parma , Italy
| | - Roberto Gaspari
- Department of Nanochemstry , Istituto Italiano di Tecnologia (IIT) , via Morego 30 , 16163 Genova , Italy
| | - Luca De Trizio
- Department of Nanochemstry , Istituto Italiano di Tecnologia (IIT) , via Morego 30 , 16163 Genova , Italy
| | - Liberato Manna
- Department of Nanochemstry , Istituto Italiano di Tecnologia (IIT) , via Morego 30 , 16163 Genova , Italy
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28
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Martini FM, Zanichelli S, Volta A, Bertoni G, Del Bue M, Borghetti P, Gnudi G. Incomplete humeral condylar fracture in two English Pointer dogs. Vet Comp Orthop Traumatol 2018. [DOI: 10.1055/s-0038-1632961] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummaryIncomplete humeral condylar fracture was diagnosed by means of radiology, CT, scintigraphy, arthroscopy and bone biopsy in two English Pointer dogs. In both cases an acute thoracic limb lameness, unrelated to a known episode of major trauma, was observed. Incomplete humeral condylar fracture, mainly described in the Spaniel breeds, has been recently diagnosed in Labrador retrievers, Rottweiler, German Wachtel and other breeds. The pathogenesis of the condition is still unknown, but incomplete ossification of the humeral condyle and mechanical stress, alone or associated, have to be considered. However, our clinical and histopathological data lead us to believe that in Pointers, high performance dogs, the mechanical stress can assume a critical ethiopathogenetic role.
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29
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Mortellaro CM, Bertoni G, Martini FM, Cantoni AM, Di Giancamillo M, Vignoli M, Gnudi G. Radial carpal bone fracture in 13 dogs. Vet Comp Orthop Traumatol 2018. [DOI: 10.1055/s-0038-1632774] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummaryThe authors report 13 dogs with radiocarpal bone fracture. The lesion was bilateral in six cases and unilateral in seven. Clinical and radiographic examination of both the carpal joints was performed. One or two fracture lines, sagittal oblique and dorsal, of the radial carpal bone were detected. CT examination of two radial carpal bones helped in a better visualization of the fracture lines. A dorsal bone fragment of a fractured radial carpal bone was removed in one dog. Histopathology revealed the presence of fibro-connective tissue on the fracture surface of the bone fragment. The fibro-connective tissue did not seem to be the sequel to acute or chronic diseases, nor to any pathological healing process. The cancellous bone of the fragment was normal as was the bulk of the articular cartilage examined. A CT guided biopsy, including the sagittal oblique fracture surface of the radial carpal bone, was also performed. The specimens revealed the presence of immature cancellous bone with diffuse immature cartilage areas. The radial carpal bone has three separate centres of ossification: the primitive radial carpal bone, the central and intermediate carpal bone. The fusion of these centres occurs at 3-4 months of age. Histopathological findings suggest a possible “incomplete fusion” of the centres of ossification rather than a true fracture of the radial carpal bone or alternatively a “fatigue fracture”. A similar condition, involving the distal part of the humerus, was originally reported in several Cocker Spaniel dogs, and more recently in Rottweilers and Labrador Retrievers.
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30
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Falcone M, Ferrara S, Rossi E, Johansen HK, Molin S, Bertoni G. The Small RNA ErsA of Pseudomonas aeruginosa Contributes to Biofilm Development and Motility through Post-transcriptional Modulation of AmrZ. Front Microbiol 2018; 9:238. [PMID: 29497413 PMCID: PMC5819304 DOI: 10.3389/fmicb.2018.00238] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 01/31/2018] [Indexed: 11/13/2022] Open
Abstract
The small RNA ErsA of Pseudomonas aeruginosa was previously suggested to be involved in biofilm formation via negative post-transcriptional regulation of the algC gene that encodes the virulence-associated enzyme AlgC, which provides sugar precursors for the synthesis of several polysaccharides. In this study, we show that a knock-out ersA mutant strain forms a flat and uniform biofilm, not characterized by mushroom-multicellular structures typical of a mature biofilm. Conversely, the knock-out mutant strain showed enhanced swarming and twitching motilities. To assess the influence of ErsA on the P. aeruginosa transcriptome, we performed RNA-seq experiments comparing the knock-out mutant with the wild-type. More than 160 genes were found differentially expressed in the knock-out mutant. Parts of these genes, important for biofilm formation and motility regulation, are known to belong also to the AmrZ transcriptional regulator regulon. Here, we show that ErsA binds in vitro and positively regulates amrZ mRNA at post-transcriptional level in vivo suggesting an interesting contribution of the ErsA-amrZ mRNA interaction in biofilm development at several regulatory levels.
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Affiliation(s)
- Marilena Falcone
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milan, Italy
| | - Silvia Ferrara
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milan, Italy
| | - Elio Rossi
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark
| | - Helle K Johansen
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark.,Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Søren Molin
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Giovanni Bertoni
- Dipartimento di Bioscienze, Università degli Studi di Milano, Milan, Italy
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31
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Shamsi J, Dang Z, Ijaz P, Abdelhady AL, Bertoni G, Moreels I, Manna L. Colloidal CsX (X = Cl, Br, I) Nanocrystals and Their Transformation to CsPbX 3 Nanocrystals by Cation Exchange. Chem Mater 2018; 30:79-83. [PMID: 31205379 PMCID: PMC6559124 DOI: 10.1021/acs.chemmater.7b04827] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 12/08/2017] [Indexed: 05/20/2023]
Affiliation(s)
- Javad Shamsi
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Zhiya Dang
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Palvasha Ijaz
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Ahmed L. Abdelhady
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Department
of Chemistry, Faculty of Science, Mansoura
University, Mansoura 35516, Egypt
| | - Giovanni Bertoni
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Iwan Moreels
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- L. Manna. E-mail:
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32
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Cresi JSP, Chiara Spadaro M, D'Addato S, Valeri S, Amidani L, Boscherini F, Bertoni G, Deiana D, Luches P. Contraction, cation oxidation state and size effects in cerium oxide nanoparticles. Nanotechnology 2017; 28:495702. [PMID: 29016361 DOI: 10.1088/1361-6528/aa926f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An accurate description of the structural and chemical modifications of cerium oxide nanoparticles (NPs) is mandatory for understanding their functionality in applications. In this work we investigate the relation between local atomic structure, oxidation state, defectivity and size in cerium oxide NPs with variable diameter below 10 nm, using x-ray absorption fine structure analysis in the near and extended energy range. The NPs are prepared by physical methods under controlled conditions and analyzed in morphology and crystalline quality by high resolution transmission electron microscopy. We resolve here an important question on the local structure of cerium oxide NPs: we demonstrate a progressive contraction in the Ce-O interatomic distance with decreasing NP diameter and we relate the observed effect to the reduced dimensionality. The contraction is not significantly modified by inducing a 4%-6% higher Ce3+ concentration through thermal annealing in high vacuum. The consequences of the observed average cation-anion distance contraction on the properties of the NPs are discussed.
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Affiliation(s)
- Jacopo Stefano Pelli Cresi
- Dipartimento di Scienze Fisiche Informatiche e Matematiche, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 213/a, I-41125, Modena, Italy. Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, Via G. Campi 213/a, I-41125, Modena, Italy
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33
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Pramudita JC, Pontiroli D, Magnani G, Gaboardi M, Milanese C, Bertoni G, Sharma N, Riccò M. Effect of Ni-nanoparticles decoration on graphene to enable high capacity sodium-ion battery negative electrodes. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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34
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Dang Z, Shamsi J, Akkerman QA, Imran M, Bertoni G, Brescia R, Manna L. Low-Temperature Electron Beam-Induced Transformations of Cesium Lead Halide Perovskite Nanocrystals. ACS Omega 2017; 2:5660-5665. [PMID: 28983524 PMCID: PMC5623946 DOI: 10.1021/acsomega.7b01009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 08/22/2017] [Indexed: 05/21/2023]
Abstract
Cesium lead halide perovskite (CsPbX3, with X = Br, Cl, I) nanocrystals have been found to undergo severe modifications under the high-energy electron beam irradiation of a transmission electron microscope (80/200 keV). In particular, in our previous work, together with halogen desorption, Pb2+ ions were found to be reduced to Pb0 and then diffused to form lead nanoparticles at temperatures above -40 °C. Here, we present a detailed irradiation study of CsPbBr3 nanocrystals at temperatures below -40 °C, a range in which the diffusion of Pb0 atoms/clusters is drastically suppressed. Under these conditions, the irradiation instead induces the nucleation of randomly oriented CsBr, CsPb, and PbBr2 crystalline domains. In addition to the Br desorption, which accompanies Pb2+ reduction at all the temperatures, Br is also desorbed from the CsBr and PbBr2 domains at low temperatures, leading to a more pronounced Br loss, thus the final products are mainly composed of Cs and Pb. The overall transformation involves the creation of voids, which coalesce upon further exposure, as demonstrated in both nanosheets and nanocuboids. Our results show that although low temperatures hinder the formation of Pb nanoparticles in CsPbBr3 nanocrystals when irradiated, the nanocrystals are nevertheless unstable. Consequently, we suggest that an optimum combination of temperature range, electron energy, and dose rate needs to be carefully chosen for the characterization of halide perovskite nanocrystals to minimize both the Pb nanoparticle formation and the structural decomposition.
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Affiliation(s)
- Zhiya Dang
- Department
of Nanochemistry and Electron Microscopy Facility, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Javad Shamsi
- Department
of Nanochemistry and Electron Microscopy Facility, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Quinten A. Akkerman
- Department
of Nanochemistry and Electron Microscopy Facility, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Muhammad Imran
- Department
of Nanochemistry and Electron Microscopy Facility, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Giovanni Bertoni
- Department
of Nanochemistry and Electron Microscopy Facility, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- IMEM
– CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze 37/A, I-43124 Parma, Italy
| | - Rosaria Brescia
- Department
of Nanochemistry and Electron Microscopy Facility, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Department
of Nanochemistry and Electron Microscopy Facility, Istituto
Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- E-mail: . Tel: +39 010 71781 502
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35
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Carloni S, Macchi R, Sattin S, Ferrara S, Bertoni G. The small RNA ReaL: a novel regulatory element embedded in the Pseudomonas aeruginosa
quorum sensing networks. Environ Microbiol 2017; 19:4220-4237. [DOI: 10.1111/1462-2920.13886] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 08/02/2017] [Accepted: 08/06/2017] [Indexed: 01/01/2023]
Affiliation(s)
- Sara Carloni
- Department of Biosciences; Università degli Studi di Milano; Milano Italy
| | - Raffaella Macchi
- Department of Biosciences; Università degli Studi di Milano; Milano Italy
| | - Sara Sattin
- Department of Chemistry; Università degli Studi di Milano; Milano Italy
| | - Silvia Ferrara
- Department of Biosciences; Università degli Studi di Milano; Milano Italy
| | - Giovanni Bertoni
- Department of Biosciences; Università degli Studi di Milano; Milano Italy
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36
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Wu C, Bertoni G, Marras S, Manna L, Colombo M. Inside Cover: Selective Fe Promotion on Au Nanoparticles: An Efficient Way to Activate Au/SiO 2
Catalysts for the CO Oxidation Reaction (ChemCatChem 15/2017). ChemCatChem 2017. [DOI: 10.1002/cctc.201701215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Chunzheng Wu
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
- Dipartimento di Chimica e Chimica Industriale, Università di Genova; via Dodecaneso 31 16146 Genova Italy
| | - Giovanni Bertoni
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
- IMEM-CNR; Parco Area delle Scienze 37/A 43124 Parma Italy
| | - Sergio Marras
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Liberato Manna
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Massimo Colombo
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
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Wu C, Bertoni G, Marras S, Manna L, Colombo M. Selective Fe Promotion on Au Nanoparticles: An Efficient Way to Activate Au/SiO2
Catalysts for the CO Oxidation Reaction. ChemCatChem 2017. [DOI: 10.1002/cctc.201700533] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chunzheng Wu
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
- Dipartimento di Chimica e Chimica Industriale, Università di Genova; via Dodecaneso 31 16146 Genova Italy
| | - Giovanni Bertoni
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
- IMEM-CNR; Parco Area delle Scienze 37/A 43124 Parma Italy
| | - Sergio Marras
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Liberato Manna
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
| | - Massimo Colombo
- Department of Nanochemistry; Istituto Italiano di Tecnologia; Via Morego 30 16163 Genova Italy
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38
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Gariano G, Lesnyak V, Brescia R, Bertoni G, Dang Z, Gaspari R, De Trizio L, Manna L. Role of the Crystal Structure in Cation Exchange Reactions Involving Colloidal Cu 2Se Nanocrystals. J Am Chem Soc 2017. [PMID: 28644018 PMCID: PMC6105078 DOI: 10.1021/jacs.7b03706] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stoichiometric Cu2Se nanocrystals were synthesized in either cubic or hexagonal (metastable) crystal structures and used as the host material in cation exchange reactions with Pb2+ ions. Even if the final product of the exchange, in both cases, was rock-salt PbSe nanocrystals, we show here that the crystal structure of the starting nanocrystals has a strong influence on the exchange pathway. The exposure of cubic Cu2Se nanocrystals to Pb2+ cations led to the initial formation of PbSe unselectively on the overall surface of the host nanocrystals, generating Cu2Se@PbSe core@shell nanoheterostructures. The formation of such intermediates was attributed to the low diffusivity of Pb2+ ions inside the host lattice and to the absence of preferred entry points in cubic Cu2Se. On the other hand, in hexagonal Cu2Se nanocrystals, the entrance of Pb2+ ions generated PbSe stripes "sandwiched" in between hexagonal Cu2Se domains. These peculiar heterostructures formed as a consequence of the preferential diffusion of Pb2+ ions through specific (a, b) planes of the hexagonal Cu2Se structure, which are characterized by almost empty octahedral sites. Our findings suggest that the morphology of the nanoheterostructures, formed upon partial cation exchange reactions, is intimately connected not only to the NC host material, but also to its crystal structure.
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Affiliation(s)
| | - Vladimir Lesnyak
- Physical Chemistry, TU Dresden , Bergstr. 66b, 01062 Dresden, Germany
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39
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Distaso M, Bertoni G, Todisco S, Marras S, Gallo V, Manna L, Peukert W. Interplay of Internal Structure and Interfaces on the Emitting Properties of Hybrid ZnO Hierarchical Particles. ACS Appl Mater Interfaces 2017; 9:15182-15191. [PMID: 28402625 DOI: 10.1021/acsami.7b00777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The design of hybrid organic/inorganic nanostructures with controlled assembly drives the development of materials with new or improved properties and superior performances. In this paper, the surface and internal structure of hybrid ZnO poly-N-vinylpyrrolidone (ZnO/PVP) mesocrystals are investigated in detail and correlated with their emitting properties. A photoluminescence study at room temperature reveals that the as-synthesized particles show a remarkable ultraviolet (UV) emission, whereas an emission from defects in the visible region is not observed. On the other hand, a visible emission is achieved upon calcination of the hybrid ZnO/PVP particles in air, and its intensity is found to increase with the calcination temperature and, in some cases, to overwhelm the UV emission. A molecular description is proposed for the absence of a visible emission from defects in the as-synthesized ZnO/PVP mesocrystals on the basis of Fourier transform infrared (FTIR) and solid-state 13C NMR (SSNMR) spectroscopy. An in-depth electron microscopy study sheds light on the internal organization of mesocrystals and reveals the formation of nanoreactors, that is, particles with enclosed porosity, upon thermal treatment.
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Affiliation(s)
- Monica Distaso
- Institute of Particle Technology, FAU Erlangen-Nuremberg , Cauerstraße, 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems, FAU Erlangen-Nuremberg , Haberstraße, 9a, 91058 Erlangen, Germany
| | | | - Stefano Todisco
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari , Via Orabona 4 (CAMPUS), I-70125 Bari, Italy
| | - Sergio Marras
- Materials Characterization Facility, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy
| | - Vito Gallo
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari , Via Orabona 4 (CAMPUS), I-70125 Bari, Italy
| | - Liberato Manna
- Nanochemistry Department, Istituto Italiano di Tecnologia , Via Morego 30, 16163 Genova, Italy
| | - Wolfgang Peukert
- Institute of Particle Technology, FAU Erlangen-Nuremberg , Cauerstraße, 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems, FAU Erlangen-Nuremberg , Haberstraße, 9a, 91058 Erlangen, Germany
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40
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Paolella A, Faure C, Bertoni G, Marras S, Guerfi A, Darwiche A, Hovington P, Commarieu B, Wang Z, Prato M, Colombo M, Monaco S, Zhu W, Feng Z, Vijh A, George C, Demopoulos GP, Armand M, Zaghib K. Light-assisted delithiation of lithium iron phosphate nanocrystals towards photo-rechargeable lithium ion batteries. Nat Commun 2017; 8:14643. [PMID: 28393912 PMCID: PMC5394232 DOI: 10.1038/ncomms14643] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 01/17/2017] [Indexed: 12/21/2022] Open
Abstract
Recently, intensive efforts are dedicated to convert and store the solar energy in a single device. Herein, dye-synthesized solar cell technology is combined with lithium-ion materials to investigate light-assisted battery charging. In particular we report the direct photo-oxidation of lithium iron phosphate nanocrystals in the presence of a dye as a hybrid photo-cathode in a two-electrode system, with lithium metal as anode and lithium hexafluorophosphate in carbonate-based electrolyte; a configuration corresponding to lithium ion battery charging. Dye-sensitization generates electron-hole pairs with the holes aiding the delithiation of lithium iron phosphate at the cathode and electrons utilized in the formation of a solid electrolyte interface at the anode via oxygen reduction. Lithium iron phosphate acts effectively as a reversible redox agent for the regeneration of the dye. Our findings provide possibilities in advancing the design principles for photo-rechargeable lithium ion batteries.
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Affiliation(s)
- Andrea Paolella
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1.,Department of Mining and Materials Engineering, McGill University, Wong Building, 3610 University Street, Montreal, Quebec, Canada H3A OC5
| | - Cyril Faure
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | | | - Sergio Marras
- Nanochemistry Department, Istituto Italiano di Tecnologia, via Morego 30, 16130 Genova, Italy
| | - Abdelbast Guerfi
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | - Ali Darwiche
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | - Pierre Hovington
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | - Basile Commarieu
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | - Zhuoran Wang
- Department of Mining and Materials Engineering, McGill University, Wong Building, 3610 University Street, Montreal, Quebec, Canada H3A OC5
| | - Mirko Prato
- Nanochemistry Department, Istituto Italiano di Tecnologia, via Morego 30, 16130 Genova, Italy
| | - Massimo Colombo
- Nanochemistry Department, Istituto Italiano di Tecnologia, via Morego 30, 16130 Genova, Italy
| | - Simone Monaco
- Nanochemistry Department, Istituto Italiano di Tecnologia, via Morego 30, 16130 Genova, Italy
| | - Wen Zhu
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | - Zimin Feng
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | - Ashok Vijh
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
| | - Chandramohan George
- Institute for Manufacturing, Department of Engineering, University of Cambridge, 17 Charles Babbage Road, Cambridge CB3 0FS, UK
| | - George P Demopoulos
- Department of Mining and Materials Engineering, McGill University, Wong Building, 3610 University Street, Montreal, Quebec, Canada H3A OC5
| | - Michel Armand
- Cicenergigune Parque Tecnologico C/Albert Einstein 48 CP, 01510 Minano (Alava), Spain
| | - Karim Zaghib
- Institute de Recherche d-Hydro-Québec (IREQ), 1800 Boulevard Lionel Boulet, Varennes, Quebec, Canada J3X 1S1
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41
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Xie Y, Chen W, Bertoni G, Kriegel I, Xiong M, Li N, Prato M, Riedinger A, Sathya A, Manna L. Tuning and Locking the Localized Surface Plasmon Resonances of CuS (Covellite) Nanocrystals by an Amorphous CuPd x S Shell. Chem Mater 2017; 29:1716-1723. [PMID: 28413257 PMCID: PMC5389691 DOI: 10.1021/acs.chemmater.6b05184] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/26/2017] [Indexed: 05/11/2023]
Abstract
We demonstrate the stabilization of the localized surface plasmon resonance (LSPR) in a semiconductor-based core-shell heterostructure made of a plasmonic CuS core embedded in an amorphous-like alloyed CuPd x S shell. This heterostructure is prepared by reacting the as-synthesized CuS nanocrystals (NCs) with Pd2+ cations at room temperature in the presence of an electron donor (ascorbic acid). The reaction starts from the surface of the CuS NCs and proceeds toward the center, causing reorganization of the initial lattice and amorphization of the covellite structure. According to density functional calculations, Pd atoms are preferentially accommodated between the bilayer formed by the S-S covalent bonds, which are therefore broken, and this can be understood as the first step leading to amorphization of the particles upon insertion of the Pd2+ ions. The position and intensity in near-infrared LSPRs can be tuned by altering the thickness of the shell and are in agreement with the theoretical optical simulation based on the Mie-Gans theory and Drude model. Compared to the starting CuS NCs, the amorphous CuPd x S shell in the core-shell nanoparticles makes their plasmonic response less sensitive to a harsh oxidation environment (generated, for example, by the presence of I2).
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Affiliation(s)
- Yi Xie
- State
Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology (WUT), No. 122, Luoshi Road, Wuhan 430070, P. R. China
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego, 30, 16163 Genova, Italy
- E-mail:
| | - Wenhui Chen
- State
Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology (WUT), No. 122, Luoshi Road, Wuhan 430070, P. R. China
| | - Giovanni Bertoni
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego, 30, 16163 Genova, Italy
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy
| | - Ilka Kriegel
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego, 30, 16163 Genova, Italy
- Molecular
Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Mo Xiong
- State
Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology (WUT), No. 122, Luoshi Road, Wuhan 430070, P. R. China
| | - Neng Li
- State
Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology (WUT), No. 122, Luoshi Road, Wuhan 430070, P. R. China
| | - Mirko Prato
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego, 30, 16163 Genova, Italy
| | - Andreas Riedinger
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego, 30, 16163 Genova, Italy
- Optical
Materials Engineering Laboratory, ETH Zurich, 8092 Zurich, Switzerland
| | - Ayyappan Sathya
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego, 30, 16163 Genova, Italy
| | - Liberato Manna
- Department
of Nanochemistry, Istituto Italiano di Tecnologia
(IIT), via Morego, 30, 16163 Genova, Italy
- E-mail:
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42
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Dang Z, Shamsi J, Palazon F, Imran M, Akkerman QA, Park S, Bertoni G, Prato M, Brescia R, Manna L. In Situ Transmission Electron Microscopy Study of Electron Beam-Induced Transformations in Colloidal Cesium Lead Halide Perovskite Nanocrystals. ACS Nano 2017; 11:2124-2132. [PMID: 28122188 PMCID: PMC5345894 DOI: 10.1021/acsnano.6b08324] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 01/25/2017] [Indexed: 05/20/2023]
Abstract
An increasing number of studies have recently reported the rapid degradation of hybrid and all-inorganic lead halide perovskite nanocrystals under electron beam irradiation in the transmission electron microscope, with the formation of nanometer size, high contrast particles. The nature of these nanoparticles and the involved transformations in the perovskite nanocrystals are still a matter of debate. Herein, we have studied the effects of high energy (80/200 keV) electron irradiation on colloidal cesium lead bromide (CsPbBr3) nanocrystals with different shapes and sizes, especially 3 nm thick nanosheets, a morphology that facilitated the analysis of the various ongoing processes. Our results show that the CsPbBr3 nanocrystals undergo a radiolysis process, with electron stimulated desorption of a fraction of bromine atoms and the reduction of a fraction of Pb2+ ions to Pb0. Subsequently Pb0 atoms diffuse and aggregate, giving rise to the high contrast particles, as previously reported by various groups. The diffusion is facilitated by both high temperature and electron beam irradiation. The early stage Pb nanoparticles are epitaxially bound to the parent CsPbBr3 lattice, and evolve into nonepitaxially bound Pb crystals upon further irradiation, leading to local amorphization and consequent dismantling of the CsPbBr3 lattice. The comparison among CsPbBr3 nanocrystals with various shapes and sizes evidences that the damage is particularly pronounced at the corners and edges of the surface, due to a lower diffusion barrier for Pb0 on the surface than inside the crystal and the presence of a larger fraction of under-coordinated atoms.
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Affiliation(s)
- Zhiya Dang
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Javad Shamsi
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Francisco Palazon
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Muhammad Imran
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Quinten A. Akkerman
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Sungwook Park
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Department
of Physics, Pukyong National University, Busan 608-737, Korea
| | - Giovanni Bertoni
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- IMEM-CNR, Parco Area delle Scienze 37/A, Parma 43124, Italy
| | - Mirko Prato
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Rosaria Brescia
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- E-mail:
| | - Liberato Manna
- Department
of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- E-mail:
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Almeida G, Dogan S, Bertoni G, Giannini C, Gaspari R, Perissinotto S, Krahne R, Ghosh S, Manna L. Colloidal Monolayer β-In 2Se 3 Nanosheets with High Photoresponsivity. J Am Chem Soc 2017; 139:3005-3011. [PMID: 28155276 PMCID: PMC5942869 DOI: 10.1021/jacs.6b11255] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
We report a low-temperature colloidal
synthesis of single-layer,
five-atom-thick, β-In2Se3 nanosheets with
lateral sizes tunable from ∼300 to ∼900 nm, using short
aminonitriles (dicyandiamide or cyanamide) as shape controlling agents.
The phase and the monolayer nature of the nanosheets were ascertained
by analyzing the intensity ratio between two diffraction peaks from
two-dimensional slabs of the various phases, determined by diffraction
simulations. These findings were further backed-up by comparing and
fitting the experimental X-ray diffraction pattern with Debye formula
simulated patterns and with side-view high-resolution transmission
electron microscopy imaging and simulation. The β-In2Se3 nanosheets were found to be indirect band gap semiconductors
(Eg = 1.55 eV), and single nanosheet photodetectors
demonstrated high photoresponsivity and fast response times.
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Affiliation(s)
- Guilherme Almeida
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova , Via Dodecaneso, 31, 16146, Genova, Italy
| | | | | | - Cinzia Giannini
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche , via Amendola 122/O, 70126 Bari, Italy
| | | | - Stefano Perissinotto
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia , via Giovanni Pascoli 70/3, I-20133 Milan, Italy
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Thomann B, Falzon LC, Bertoni G, Vogt HR, Schüpbach-Regula G, Magouras I. A census to determine the prevalence and risk factors for caprine arthritis-encephalitis virus and visna/maedi virus in the Swiss goat population. Prev Vet Med 2016; 137:52-58. [PMID: 28107881 DOI: 10.1016/j.prevetmed.2016.12.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 12/13/2016] [Accepted: 12/19/2016] [Indexed: 10/20/2022]
Abstract
In Switzerland, viruses belonging to two different phylogenetic groups of small ruminant lentiviruses (SRLV) are currently circulating: the caprine arthritis-encephalitis virus (CAEV) and visna/maedi virus (VMV). In the past two decades, a mandatory national control program has led to a very low prevalence of seropositivity, while completely eliminating CAE as a clinical manifestation. However, in order to reduce the high costs and effort associated with this program, adjustments based on the most recent epidemiological knowledge are needed. The purpose of this study was to estimate the seroprevalence of CAEV and VMV using the newest diagnostic tools available, and to identify potential risk factors for infection with these viruses in Switzerland. For the prevalence estimation, a census was carried out including 10,696 farms with a total of 85,454 goats. Blood samples were analysed using a 3-step serological testing algorithm consisting of Chekit ELISA, Western Blot and SU5 ELISA. A risk factor analysis was conducted using logistic regression models built with data obtained from a mail questionnaire, and serological results from the census. The apparent herd-level prevalences were 0.38%, 2.77%, and 3.04% for CAEV, VMV and SRLV, respectively. Animal-level prevalences were 0.06% for CAEV, 0.55% for VMV, and 0.61% for SRLV. No statistically significant risk factors associated with CAEV or VMV infection were identified. However, the proportional high number of CAEV seropositive dwarf goats, in relation to their population size, could indicate that these hobby breeds may slip through some of the official controls. For an infection with SRLV, a medium herd size (7-40 goats) was found to be protective, compared with smaller (OR=1.90, p=0.034) and larger herds (OR=1.95, p=0.038). In conclusion, considering that all CAEV positive animals were culled, these results imply that CAEV is no longer actively spreading and has successfully been controlled in Switzerland. However, given the uncertain pathogenic potential of VMV in goats, future surveillance should also be taking into account the not insignificant number of VMV circulating in the Swiss goat population.
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Affiliation(s)
- B Thomann
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Schwarzenburgstrasse 155, 3097 Liebefeld, Switzerland.
| | - L C Falzon
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Schwarzenburgstrasse 155, 3097 Liebefeld, Switzerland
| | - G Bertoni
- Institute of Virology and Immunology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland
| | - H R Vogt
- Institute of Veterinary Virology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, 3012 Bern, Switzerland
| | - G Schüpbach-Regula
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Schwarzenburgstrasse 155, 3097 Liebefeld, Switzerland
| | - I Magouras
- Veterinary Public Health Institute, Vetsuisse Faculty, University of Bern, Schwarzenburgstrasse 155, 3097 Liebefeld, Switzerland
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Valenti G, Boni A, Melchionna M, Cargnello M, Nasi L, Bertoni G, Gorte RJ, Marcaccio M, Rapino S, Bonchio M, Fornasiero P, Prato M, Paolucci F. Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution. Nat Commun 2016; 7:13549. [PMID: 27941752 PMCID: PMC5159813 DOI: 10.1038/ncomms13549] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 10/13/2016] [Indexed: 11/16/2022] Open
Abstract
Considering the depletion of fossil-fuel reserves and their negative environmental impact, new energy schemes must point towards alternative ecological processes. Efficient hydrogen evolution from water is one promising route towards a renewable energy economy and sustainable development. Here we show a tridimensional electrocatalytic interface, featuring a hierarchical, co-axial arrangement of a palladium/titanium dioxide layer on functionalized multi-walled carbon nanotubes. The resulting morphology leads to a merging of the conductive nanocarbon core with the active inorganic phase. A mechanistic synergy is envisioned by a cascade of catalytic events promoting water dissociation, hydride formation and hydrogen evolution. The nanohybrid exhibits a performance exceeding that of state-of-the-art electrocatalysts (turnover frequency of 15000 H2 per hour at 50 mV overpotential). The Tafel slope of ∼130 mV per decade points to a rate-determining step comprised of water dissociation and formation of hydride. Comparative activities of the isolated components or their physical mixtures demonstrate that the good performance evolves from the synergistic hierarchical structure.
Hydrogen evolution by water electrolysis is a promising route to 'green energy', but efficiency is still an issue. Here, the authors make mixed organic/inorganic hierarchical nanostructures with high hydrogen evolution activity, identifying synergic effects in the material contributing to enhanced efficiency.
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Affiliation(s)
- Giovanni Valenti
- Department of Chemistry 'Giacomo Ciamician', University of Bologna and INSTM, via Selmi 2, Bologna 40126, Italy
| | - Alessandro Boni
- Department of Chemistry 'Giacomo Ciamician', University of Bologna and INSTM, via Selmi 2, Bologna 40126, Italy
| | - Michele Melchionna
- Department of Chemical and Pharmaceutical Sciences and INSTM, University of Trieste, via L. Giorgieri 1, Trieste 34127, Italy
| | - Matteo Cargnello
- Department of Chemical Engineering and SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, USA
| | - Lucia Nasi
- IMEM-CNR Institute, Parco area delle Scienze 37/A, Parma 43124, Italy
| | - Giovanni Bertoni
- IMEM-CNR Institute, Parco area delle Scienze 37/A, Parma 43124, Italy
| | - Raymond J Gorte
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, 220 S. 33rd Street, Philadelphia, Pennsylvania 19104, USA
| | - Massimo Marcaccio
- Department of Chemistry 'Giacomo Ciamician', University of Bologna and INSTM, via Selmi 2, Bologna 40126, Italy
| | - Stefania Rapino
- Department of Chemistry 'Giacomo Ciamician', University of Bologna and INSTM, via Selmi 2, Bologna 40126, Italy
| | - Marcella Bonchio
- Department of Chemical Sciences and ITM-CNR, University of Padova, via F. Marzolo 1, Padova 35131, Italy
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences and INSTM, University of Trieste, via L. Giorgieri 1, Trieste 34127, Italy.,ICCOM-CNR Trieste Associate Unit, University of Trieste, via L. Giorgieri 1, Trieste 34127, Italy
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences and INSTM, University of Trieste, via L. Giorgieri 1, Trieste 34127, Italy.,Nanobiotechnology Laboratory, CIC biomaGUNE, Paseo de Miramón 182, Donostia-San Sebastián 20009, Spain.,Ikerbasque, Basque Foundation for Science, Bilbao 48013, Spain
| | - Francesco Paolucci
- Department of Chemistry 'Giacomo Ciamician', University of Bologna and INSTM, via Selmi 2, Bologna 40126, Italy.,ICMATE-CNR Bologna Associate Unit, University of Bologna, via Selmi 2, Bologna 40126, Italy
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Spadaro MC, Luches P, Bertoni G, Grillo V, Turner S, Van Tendeloo G, Valeri S, D'Addato S. Influence of defect distribution on the reducibility of CeO2-x nanoparticles. Nanotechnology 2016; 27:425705. [PMID: 27631569 DOI: 10.1088/0957-4484/27/42/425705] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Ceria nanoparticles (NPs) are fundamental in heterogeneous catalysis because of their ability to store or release oxygen depending on the ambient conditions. Their oxygen storage capacity is strictly related to the exposed planes, crystallinity, density and distribution of defects. In this work a study of ceria NPs produced with a ligand-free, physical synthesis method is presented. The NP films were grown by a magnetron sputtering based gas aggregation source and studied by high resolution- and scanning-transmission electron microscopy and x-ray photoelectron spectroscopy. In particular, the influence of the oxidation procedure on the NP reducibility has been investigated. The different reducibility has been correlated to the exposed planes, crystallinity and density and distribution of structural defects. The results obtained in this work represent a basis to obtain cerium oxide NP with desired oxygen transport properties.
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Affiliation(s)
- Maria Chiara Spadaro
- Dipartimento FIM, Università di Modena e Reggio Emilia, via G. Campi 213/a, I-41125 Modena, Italy. CNR-NANO, via G. Campi 213/a, I-41125 Modena, Italy
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Baldwin RL, Li C, Bickhart DM, Evock-Clover CM, Grossi P, Choudhary RK, Elsasser TH, Bertoni G, Trevisi E, Aiken GE, McLeod KR, Capuco A. 0850 Consumption of endophyte-infected fescue seed during the dry period and lactation affects mammary gland gene expression in dairy cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-0850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Lak A, Niculaes D, Anyfantis GC, Bertoni G, Barthel MJ, Marras S, Cassani M, Nitti S, Athanassiou A, Giannini C, Pellegrino T. Facile transformation of FeO/Fe 3O 4 core-shell nanocubes to Fe 3O 4 via magnetic stimulation. Sci Rep 2016; 6:33295. [PMID: 27665698 PMCID: PMC5036086 DOI: 10.1038/srep33295] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 08/24/2016] [Indexed: 01/01/2023] Open
Abstract
Here, we propose the use of magnetic hyperthermia as a means to trigger the oxidation of Fe1-xO/Fe3-δO4 core-shell nanocubes to Fe3-δO4 phase. As a first relevant consequence, the specific absorption rate (SAR) of the initial core-shell nanocubes doubles after exposure to 25 cycles of alternating magnetic field stimulation. The improved SAR value was attributed to a gradual transformation of the Fe1-xO core to Fe3-δO4, as evidenced by structural analysis including high resolution electron microscopy and Rietveld analysis of X-ray diffraction patterns. The magnetically oxidized nanocubes, having large and coherent Fe3-δO4 domains, reveal high saturation magnetization and behave superparamagnetically at room temperature. In comparison, the treatment of the same starting core-shell nanocubes by commonly used thermal annealing process renders a transformation to γ-Fe2O3. In contrast to other thermal annealing processes, the method here presented has the advantage of promoting the oxidation at a macroscopic temperature below 37 °C. Using this soft oxidation process, we demonstrate that biotin-functionalized core-shell nanocubes can undergo a mild self-oxidation transformation without losing their functional molecular binding activity.
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Affiliation(s)
- Aidin Lak
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Dina Niculaes
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | | | | | | | - Sergio Marras
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Marco Cassani
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Simone Nitti
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | | | - Cinzia Giannini
- Institute of Crystallography, National Research Council, via Amendola 122/O, Bari 70126 Italy
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Zurnic I, Hütter S, Lehmann U, Stanke N, Reh J, Kern T, Lindel F, Gerresheim G, Hamann M, Müllers E, Lesbats P, Cherepanov P, Serrao E, Engelman A, Lindemann D, Da Silva Santos C, Tartour K, Cimarelli A, Burdick R, Chen J, Sastri J, Hu WS, Pathak V, Keppler OT, Pradeau K, Eiler S, Levy N, Lennon S, Cianferani S, Emiliani S, Ruff M, Parissi V, Rato S, Rausell A, Munoz M, Telenti A, Ciuffi A, Zhyvoloup A, Melamed A, Anderson I, Planas D, Kriston-Vizi J, Ketteler R, Lee CH, Merritt A, Ancuta P, Bangham C, Fassati A, Rodari A, Van Driessche B, Galais M, Delacourt N, Fauquenoy S, Vanhulle C, Kula A, Burny A, Rohr O, Van Lint C, van Montfort T, van der Sluis R, Speijer D, Berkhout B, Meng B, Rutkowski A, Berry N, Dölken L, Lever A, Schuster T, Asbach B, Wagner R, Gross C, Wiesmann V, Kalmer M, Wittenberg T, Gettemans J, Thoma-Kress AK, Li M, Freed EO, Liu SL, Müller J, Münch J, Sewald X, Uchil P, Ladinsky M, Beloor J, Pi R, Herrmann C, Motamedi N, Murooka T, Brehm M, Greiner D, Mempel T, Bjorkman P, Kumar P, Mothes W, Joas S, Parrish E, Gnanadurai CW, Lump E, Stürzel CM, Parrish NF, Sauermann U, Töpfer K, Schultheiss T, Bosinger S, Silvestri G, Apetrei C, Huot N, Müller-Trutwin M, Sauter D, Hahn BH, Stahl-Hennig C, Kirchhoff F, Schumann G, Jung-Klawitter S, Fuchs NV, Upton KR, Muñoz-Lopez M, Shukla R, Wang J, Garcia-Canadas M, Lopez-Ruiz C, Gerhardt DJ, Sebe A, Grabundzija I, Gerdes P, Merkert S, Pulgarin A, Bock A, Held U, Witthuhn A, Haase A, Wolvetang EJ, Martin U, Ivics Z, Izsvák Z, Garcia-Perez J, Faulkner GJ, Hurst T, Katzourakis A, Magiorkinis G, Schott K, Derua R, Seifried J, Reuter A, Schmitz H, Tondera C, Brandariz-Nuñez A, Diaz-Griffero F, Janssens V, König R, Baldauf HM, Stegmann L, Schwarz SM, Trotard M, Martin M, Lenzi G, Burggraf M, Pan X, Fregoso OI, Lim ES, Abraham L, Erikson E, Nguyen L, Ambiel I, Rutsch F, Kim B, Emerman M, Fackler OT, Wittmann S, Behrendt R, Volkmann B, Eissmann K, Gramberg T, Bolduan S, Koppensteiner H, Regensburg S, Brack-Werner R, Draenert R, Schindler M, Ducroux A, Xu S, Ponnurangam A, Franz S, Malassa A, Ewald E, Goffinet C, Fung SY, Chan CP, Yuen CK, Kok KH, Chan CP, Jin DY, Dittmer U, Kmiec D, Iyer S, Stürzel C, Hahn B, Ariumi Y, Yasuda-Inoue M, Kawano K, Tateishi S, Turelli P, Compton A, Roy N, Porrot F, Billet A, Casartelli N, Yount J, Liang C, Schwartz O, Magnus C, Reh L, Moore P, Uhr T, Weber J, Morris L, Trkola A, Grindberg RV, Schlaepfer E, Schreiber G, Simon V, Speck RF, Debyser Z, Vranckx L, Demeulemeester J, Saleh S, Verdin E, Cereseto A, Christ F, Gijsbers R, Wang G, Zhao N, Das AT, Köstler J, Perdiguero B, Esteban M, Jacobs BL, Montefiori DC, LaBranche CC, Yates NL, Tomaras GD, Ferrari G, Foulds KE, Roederer M, Landucci G, Forthal DN, Seaman MS, Hawkins N, Self SG, Phogat S, Tartaglia J, Barnett SW, Burke B, Cristillo AD, Ding S, Heeney JL, Pantaleo G, Stab V, Ensser A, Tippler B, Burton D, Tenbusch M, Überla K, Alter G, Lofano G, Dugast AS, Kulkarni V, Suscovich T, Opazo T, Barraza F, Herrera D, Garces A, Schwenke T, Tapia D, Cancino J, Arriagada G, Haußner C, Damm D, Rohrhofer A, Schmidt B, Eichler J, Midgley R, Wheeldon J, Piguet V, Khopkar P, Rohamare M, Kulkarni S, Godinho-Santos A, Hance A, Goncalves J, Mammano F, Gasser R, Hamoudi M, Pellicciotta M, Zhou Z, Visdeloup C, Colin P, Braibant M, Lagane B, Negroni M, Wamara J, Bannert N, Mesplede T, Osman N, Anstett K, Liang JC, Pham HT, Wainberg M, Shao W, Shan J, Kearney M, Wu X, Maldarelli F, Mellors J, Luke B, Coffin J, Hughes S, Fricke T, Opp S, Shepard C, Ivanov D, Valle-Casuso J, Kanja M, Cappy P, Negroni M, Lener D, Knyazhanskaya E, Anisenko A, Zatsepin T, Gottikh M, Komkov A, Minervina A, Nugmanov G, Nazarov V, Khodosevich K, Mamedov I, Lebedev Y, Colomer-Lluch M, Serra-Moreno R, Sarracino A, Gharu L, Pasternak A, Marcello A, McCartin AM, Kulkarni A, Le Douce V, Gautier V, Baeyens A, Naessens E, Van Nuffel A, Weening K, Reilly AM, Claeys E, Trypsteen W, Vandekerckhove L, Eyckerman S, Gevaert K, Verhasselt B, Mok HP, Norton N, Fun A, Hirst J, Wills M, Miklik D, Senigl F, Hejnar J, Sakuragi JI, Sakuragi S, Yokoyama M, Shioda T, Sato H, Bodem J, Moschall R, Denk S, Erkelenz S, Schenk C, Schaal H, Donhauser N, Socher E, Millen S, Sticht H, Gross C, Mann M, Wei G, Betts MJ, Liu Y, Kehl T, Russell RB, Löchelt M, Hohn O, Mostafa S, Hanke K, Norley S, Chen CY, Shingai M, Borrego P, Taveira N, Strebel K, Hellmund C, Meng B, Friedrich M, Hahn F, Setz C, Rauch P, Fraedrich K, Matthaei A, Henklein P, Traxdorf M, Fossen T, Schubert U, Khwaja A, Galilee M, Alian A, Schwalbe B, Hauser H, Schreiber M, Scherpenisse M, Cho YK, Kim J, Jeong D, Trejbalova K, Benesova M, Kucerova D, Vernerova Z, Amouroux R, Hajkova P, Elleder D, Hron T, Farkasova H, Padhi A, Paces J, Zhu H, Gifford R, Murcia P, Carrozza ML, Niewiadomska AM, Mazzei M, Abi-Said M, Hughes J, Hué S, Gifford R, Obasa A, Jacobs G, Engelbrecht S, Mack K, Starz K, Geyer M, Bibollet-Ruche F, Stürzel C, Leoz M, Plantier JC, Argaw-Denboba A, Balestrieri E, Serafino A, Bucci I, Cipriani C, Spadafora C, Sinibaldi-Vallebona P, Matteucci C, Jayashree SN, Neogi U, Chhangani AK, Rathore SS, Mathur BRJ, Abati A, Koç BT, Oğuzoğlu TÇ, Shimauchi T, Caucheteux S, Turpin J, Finsterbusch K, Tokura Y, Souriant S, Balboa L, Pingris K, Kviatcowsky D, Raynaud-Messina B, Cougoule C, Mercier I, Kuroda M, González-Montaner P, Inwentarz S, Moraña EJ, del Carmen Sasiain M, Neyrolles O, Maridonneau-Parini I, Lugo-Villarino G, Vérollet C, Herrmann A, Thomas D, Bouzas NF, Lahaye X, Bhargava A, Satoh T, Gentili M, Cerboni S, Silvin A, Conrad C, Ahmed-Belkacem H, Rodriguez EC, Guichou JF, Bosquet N, Piel M, Le Grand R, King M, Pawlotsky JM, Manel N, Hofmann H, Vanwalscappel B, Bloch N, Landau N, Indik S, Hagen B, Valle-Casuso JC, Allouch A, David A, Barré-Sinoussi F, Benkirane M, Pancino G, Saez-Cirion A, Lee WY, Sloan R, Schulte B, Opp S, Blomberg J, Vargiu L, Rodriguez-Tomé P, Tramontano E, Sperber G, Kumari N, Ammosova T, Diaz S, Oneal P, Nekhai S, Fahrny A, Gers-Huber G, Audigé A, Jayaprakash A, Sachidanandam R, Hernandez M, Dillon-White M, Souriant S, Pingris K, Raynaud-Messina B, Cougoule C, Mercier I, Neyrolles O, Maridonneau-Parini I, Lugo-Villarino G, Maze E, Ham C, Almond N, Towers G, Belshaw R, de Sousa-Pereira P, Abrantes J, Pizzato M, Esteves PJ, Kahle T, Schmitt S, Merkel L, Reuter N, Stamminger T, Rosa ID, Bishop K, Spinazzola A, Groom H, Vieyres G, Müsken M, Zillinger T, Hornung V, Barchet W, Häussler S, Pietschmann T, Javed A, Leuchte N, Salinas G, Opitz L, Sopper S, Mummert C, Hofmann C, Hückelhoven AG, Bergmann S, Müller-Schmucker SM, Harrer EG, Dörrie J, Schaft N, Harrer T, Cardinaux L, Zahno ML, Vogt HR, Zanoni R, Bertoni G, Muenchhoff M, Goulder P, Keppler O, Rebensburg S, Helfer M, Zhang Y, Chen H, Bernier A, Gosselin A, Routy JP, Wöhrl B, Schneider A, Corona A, Spöring I, Jordan M, Buchholz B, Maccioni E, Di Santo R, Schweimer K, Schölz C, Weinert B, Wagner S, Beli P, Miyake Y, Qi J, Jensen L, Streicher W, McCarthy A, Westwood N, Lain S, Cox J, Matthias P, Mann M, Bradner J, Choudhary C, Stern M, Valletta E, Frezza C, Marino-Merlo F, Grelli S, Serafino AL, Mastino A, Macchi B, Kaulfuß M, Windmann S, Bayer W, Mikasi S, Jacobs G, Heß R, Bonsmann MSG, Kirschning C, Lepenies B, Kolenbrander A, Temchura V, Iijima K, Kobayashi J, Ishizaka Y. Proceedings of the Frontiers of Retrovirology Conference 2016. Retrovirology 2016. [PMCID: PMC5046194 DOI: 10.1186/s12977-016-0294-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Oral presentations Session 1: Entry & uncoating O1 Host cell polo-like kinases (PLKs) promote early prototype foamy virus (PFV) replication Irena Zurnic, Sylvia Hütter, Ute Lehmann, Nicole Stanke, Juliane Reh, Tobias Kern, Fabian Lindel, Gesche Gerresheim, Martin Hamann, Erik Müllers, Paul Lesbats, Peter Cherepanov, Erik Serrao, Alan Engelman, Dirk Lindemann O2 A novel entry/uncoating assay reveals the presence of at least two species of viral capsids during synchronized HIV-1 infection Claire Da Silva Santos, Kevin Tartour, Andrea Cimarelli O3 Dynamics of nuclear envelope association and nuclear import of HIV-1 complexes Rya Burdick, Jianbo Chen, Jaya Sastri, Wei-Shau Hu, Vinay Pathak O4 Human papillomavirus protein E4 potently enhances the susceptibility to HIV infection Oliver T. Keppler Session 2: Reverse transcription & integration O5 Structure and function of HIV-1 integrase post translational modifications Karine Pradeau, Sylvia Eiler, Nicolas Levy, Sarah Lennon, Sarah Cianferani, Stéphane Emiliani, Marc Ruff O6 Regulation of retroviral integration by RNA polymerase II associated factors and chromatin structure Vincent Parissi Session 3: Transcription and latency O7 A novel single-cell analysis pipeline to identify specific biomarkers of HIV permissiveness Sylvie Rato, Antonio Rausell, Miguel Munoz, Amalio Telenti, Angela Ciuffi O8 A capsid-dependent integration program linking T cell activation to HIV-1 gene expression Alexander Zhyvoloup, Anat Melamed, Ian Anderson, Delphine Planas, Janos Kriston-Vizi, Robin Ketteler, Chen-Hsuin Lee, Andy Merritt, Petronela Ancuta, Charles Bangham, Ariberto Fassati O9 Characterisation of new RNA polymerase III and RNA polymerase II transcriptional promoters in the Bovine Leukemia Virus genome Anthony Rodari, Benoit Van Driessche, Mathilde Galais, Nadége Delacourt, Sylvain Fauquenoy, Caroline Vanhulle, Anna Kula, Arsène Burny, Olivier Rohr, Carine Van Lint O10 Tissue-specific dendritic cells differentially modulate latent HIV-1 reservoirs Thijs van Montfort, Renee van der Sluis, Dave Speijer, Ben Berkhout Session 4: RNA trafficking & packaging O11 A novel cis-acting element affecting HIV replication Bo Meng, Andrzej Rutkowski, Neil Berry, Lars Dölken, Andrew Lever O12 Tolerance of HIV’s late gene expression towards stepwise codon adaptation Thomas Schuster, Benedikt Asbach, Ralf Wagner Session 5: Assembly & release O13 Importance of the tax-inducible actin-bundling protein fascin for transmission of human T cell leukemia virus Type 1 (HTLV-1) Christine Gross, Veit Wiesmann, Martina Kalmer, Thomas Wittenberg, Jan Gettemans, Andrea K. Thoma-Kress O14 Lentiviral nef proteins antagonize TIM-mediated inhibition of viral release Minghua Li, Eric O. Freed, Shan-Lu Liu Session 6: Pathogenesis & evolution O15 SEVI and semen prolong the half-life of HIV-1 Janis Müller, Jan Münch O16 CD169+ macrophages mediate retrovirus trans-infection of permissive lymphocytes to establish infection in vivo Xaver Sewald, Pradeep Uchil, Mark Ladinsky, Jagadish Beloor, Ruoxi Pi, Christin Herrmann, Nasim Motamedi, Thomas Murooka, Michael Brehm, Dale Greiner, Thorsten Mempel, Pamela Bjorkman, Priti Kumar, Walther Mothes O17 Efficient replication of a vpu containing SIVagm construct in African Green Monkeys requires an HIV-1 nef gene Simone Joas, Erica Parrish, Clement Wesley Gnanadurai, Edina Lump, Christina M. Stürzel, Nicholas F. Parrish, Ulrike Sauermann, Katharina Töpfer, Tina Schultheiss, Steven Bosinger, Guido Silvestri, Cristian Apetrei, Nicholas Huot, Michaela Müller-Trutwin, Daniel Sauter, Beatrice H. Hahn, Christiane Stahl-Hennig, Frank Kirchhoff O18 Reprogramming initiates mobilization of endogenous mutagenic LINE-1, Alu and SVA retrotransposons in human induced pluripotent stem cells with consequences for host gene expression Gerald Schumann, Sabine Jung-Klawitter, Nina V. Fuchs, Kyle R. Upton, Martin Muñoz-Lopez, Ruchi Shukla, Jichang Wang, Marta Garcia-Canadas, Cesar Lopez-Ruiz, Daniel J. Gerhardt, Attila Sebe, Ivana Grabundzija, Patricia Gerdes, Sylvia Merkert, Andres Pulgarin, Anja Bock, Ulrike Held, Anett Witthuhn, Alexandra Haase, Ernst J. Wolvetang, Ulrich Martin, Zoltán Ivics, Zsuzsanna Izsvák, J. Garcia-Perez, Geoffrey J. Faulkner O19 NF-κB activation induces expression of human endogenous retrovirus and particle production Tara Hurst, Aris Katzourakis, Gkikas Magiorkinis Session 7a and b: Innate sensing & intrinsic immunity O20 Identification of the phosphatase acting on T592 in SAMHD1 during M/G1 transition Kerstin Schott, Rita Derua, Janna Seifried, Andreas Reuter, Heike Schmitz, Christiane Tondera, Alberto Brandariz-Nuñez, Felipe Diaz-Griffero, Veerle Janssens, Renate König O21 Vpx overcomes a SAMHD1-independent block to HIV reverse transcription that is specific to resting CD4 T cells Hanna-Mari Baldauf, Lena Stegmann, Sarah-Marie Schwarz, Maud Trotard, Margarethe Martin, Gina Lenzi, Manja Burggraf, Xiaoyu Pan, Oliver I. Fregoso, Efrem S. Lim, Libin Abraham, Elina Erikson, Laura Nguyen, Ina Ambiel, Frank Rutsch, Renate König, Baek Kim, Michael Emerman, Oliver T. Fackler, Oliver T. Keppler O22 The role of SAMHD1 in antiviral restriction and immune sensing in the mouse Sabine Wittmann, Rayk Behrendt, Bianca Volkmann, Kristin Eissmann, Thomas Gramberg O23 T cells expressing reduced restriction factors are preferentially infected in therapy naïve HIV-1 patients Sebastian Bolduan, Herwig Koppensteiner, Stefanie Regensburg, Ruth Brack-Werner, Rika Draenert, Michael Schindler O24 cGAS-mediated innate immunity spreads through HIV-1 env-induced membrane fusion sites from infected to uninfected primary HIV-1 target cells Aurélie Ducroux, Shuting Xu, Aparna Ponnurangam, Sergej Franz, Angelina Malassa, Ellen Ewald, Christine Goffinet O25 Perturbation of innate RNA and DNA sensing by human T cell leukemia virus type 1 oncoproteins Sin-Yee Fung, Ching-Ping Chan, Chun-Kit Yuen, Kin-Hang Kok, Chin-Ping Chan, Dong-Yan Jin O26 Induction and anti-viral activity of Interferon α subtypes in HIV-1 infection Ulf Dittmer O27 Vpu-mediated counteraction of tetherin is a major determinant of HIV-1 interferon resistance Dorota Kmiec, Shilpa Iyer, Christina Stürzel, Daniel Sauter, Beatrice Hahn, Frank Kirchhoff O28 DNA repair protein Rad18 restricts HIV-1 and LINE-1 life cycle Yasuo Ariumi, Mariko Yasuda-Inoue, Koudai Kawano, Satoshi Tateishi, Priscilla Turelli O29 Natural mutations in IFITM3 allow escape from post-translational regulation and toggle antiviral specificity Alex Compton, Nicolas Roy, Françoise Porrot, Anne Billet, Nicoletta Casartelli, Jacob Yount, Chen Liang, Oliver Schwartz Session 8: Adaptive immunity & immune evasion O30 Observing evolution in HIV-1 infection: phylogenetics and mutant selection windows to infer the influence of the autologous antibody response on the viral quasispecies Carsten Magnus, Lucia Reh, Penny Moore, Therese Uhr, Jacqueline Weber, Lynn Morris, Alexandra Trkola O31 Dose and subtype specific analyses of the anti-HIV effects of IFN-alpha family members Rashel V. Grindberg, Erika Schlaepfer, Gideon Schreiber, Viviana Simon, Roberto F. Speck Session 9: Novel antiviral strategies O32 LEDGIN-mediated inhibition of the integrase-LEDGF/p75 interaction reduces reactivation of residual latent HIV Zeger Debyser, Lenard Vranckx, Jonas Demeulemeester, Suha Saleh, Eric Verdin, Anna Cereseto, Frauke Christ, Rik Gijsbers O33 NKG2D-mediated clearance of reactivated viral reservoirs by natural killer cells O34 Inhibition of HIV reactivation in brain cells by AAV-mediated delivery of CRISPR/Cas9 O35 CRISPR-Cas9 as antiviral: potent HIV-1 inhibition, but rapid virus escape and the subsequent design of escape-proof antiviral strategies Ben Berkhout, Gang Wang, Na Zhao, Atze T. Das Session 10: Recent advances in HIV vaccine development O36 Priming with a potent HIV-1 DNA vaccine frames the quality of T cell and antibody responses prior to a poxvirus and protein boost Benedikt Asbach, Josef Köstler, Beatriz Perdiguero, Mariano Esteban, Bertram L. Jacobs, David C. Montefiori, Celia C. LaBranche, Nicole L. Yates, Georgia D. Tomaras, Guido Ferrari, Kathryn E. Foulds, Mario Roederer, Gary Landucci, Donald N. Forthal, Michael S. Seaman, Natalie Hawkins, Steven G. Self, Sanjay Phogat, James Tartaglia, Susan W. Barnett, Brian Burke, Anthony D. Cristillo, Song Ding, Jonathan L. Heeney, Giuseppe Pantaleo, Ralf Wagner O37 Passive immunisation with a neutralising antibody against HIV-1 Env prevents infection of the first cells in a mucosal challenge rhesus monkey model Christiane Stahl-Hennig, Viktoria Stab, Armin Ensser, Ulrike Sauermann, Bettina Tippler, Dennis Burton, Matthias Tenbusch, Klaus Überla O38 HIV antibody Fc-glycoforms drive B cell affinity maturation Galit Alter, Giuseppe Lofano, Anne-Sophie Dugast, Viraj Kulkarni, Todd Suscovich Poster presentations Topic 1: Entry & uncoating P1 Dynein light chain is required for murine leukemia virus infection Tatiana Opazo, Felipe Barraza, Diego Herrera, Andrea Garces, Tomas Schwenke, Diego Tapia, Jorge Cancino, Gloria Arriagada P2 Peptide paratope mimics of the broadly neutralising HIV-1 antibody b12 Christina Haußner, Dominik Damm, Anette Rohrhofer, Barbara Schmidt, Jutta Eichler P3 Investigating cellular pathways involved in the transmission of HIV-1 between dendritic cells and T cells using RNAi screening techniques Rebecca Midgley, James Wheeldon, Vincent Piguet P4 Co-receptor tropism in HIV-1, HIV-2 monotypic and dual infections Priyanka Khopkar, Megha Rohamare, Smita Kulkarni P5 Characterisation of the role of CIB1 and CIB2 as HIV-1 helper factors Ana Godinho-Santos, Allan Hance, Joao Goncalves, Fabrizio Mammano P6 Buffering deleterious polymorphisms in the highly constrained C2 region of HIV-1 envelope by the flexible V3 domain Romain Gasser, Meriem Hamoudi, Martina Pellicciotta, Zhicheng Zhou, Clara Visdeloup, Philippe Colin, Martine Braibant, Bernard Lagane, Matteo Negroni P7 Entry inhibition of HERV-K(HML-2) by an Env-IgG fusion protein Jula Wamara, Norbert Bannert Topic 2: Reverse transcription & integration P8 The R263K/H51Y resistance substitutions in HIV integrase decreases levels of integrated HIV DNA over time Thibault Mesplede, Nathan Osman, Kaitlin Anstett, Jiaming Calvin Liang, Hanh Thi Pham, Mark Wainberg P9 The Retrovirus Integration Database (RID) Wei Shao, Jigui Shan, Mary Kearney, Xiaolin Wu, Frank Maldarelli, John Mellors, Brian Luke, John Coffin, Stephen Hughes P10 The small molecule 3G11 inhibits HIV-1 reverse transcription Thomas Fricke, Silvana Opp, Caitlin Shepard, Dmitri Ivanov, Baek Kim, Jose Valle-Casuso, Felipe Diaz-Griffero P11 Dual and opposite regulation of HIV-1 integration by hRAD51: impact on therapeutical approaches using homologous DNA repair modulators Vincent Parissi P12 A flexible motif essential for integration by HIV-1 integrase Marine Kanja, Pierre Cappy, Matteo Negroni, Daniela Lener P13 Interaction between HIV-1 integrase and the host protein Ku70: identification of the binding site and study of the influence on integrase-proteasome interplay Ekaterina Knyazhanskaya, Andrey Anisenko, Timofey Zatsepin, Marina Gottikh P14 Normalisation based method for deep sequencing of somatic retroelement integrations in human genome Alexander Komkov, Anastasia Minervina, Gaiaz Nugmanov, Vadim Nazarov, Konstantin Khodosevich, Ilgar Mamedov, Yuri Lebedev Topic 3: Transcription and latency P15 BCA2/RABRING7 restricts HIV-1 transcription by preventing the nuclear translocation of NF-κB Marta Colomer-Lluch, Ruth Serra-Moreno P16 MATR3 post-transcriptional regulation of HIV-1 transcription during latency Ambra Sarracino, Anna Kula, Lavina Gharu, Alexander Pasternak, Carine Van Lint, Alessandro Marcello P17 HIV-1 tat intersects the SUMO pathway to regulate HIV-1 promoter activity Ann Marie McCartin, Anurag Kulkarni, Valentin Le Douce, Virginie Gautier P18 Conservation in HIV-1 Vpr guides tertiary gRNA folding and alternative splicing Ann Baeyens, Evelien Naessens, Anouk Van Nuffel, Karin Weening, Anne-Marie Reilly, Eva Claeys, Wim Trypsteen, Linos Vandekerckhove, Sven Eyckerman, Kris Gevaert, Bruno Verhasselt P19 The majority of reactivatable latent HIV are genetically distinct Hoi Ping Mok, Nicholas Norton, Axel Fun, Jack Hirst, Mark Wills, Andrew Lever P20 Do mutations in the tat exonic splice enhancer contribute to HIV-1 latency? Nicholas Norton, Hoi Ping Mok, Jack Hirst, Andrew Lever P21 Culture-to-Ct: A fast and direct RT-qPCR HIV gene reactivation screening method using primary T cell culture Valentin Le Douce, Ann Marie McCartin, Virginie Gautier P22 A novel approach to define populations of early silenced proviruses Dalibor Miklik, Filip Senigl, Jiri Hejnar Topic 4: RNA trafficking & packaging P23 Functional analysis of the structure and conformation of HIV-1 genome RNA DIS Jun-ichi Sakuragi, Sayuri Sakuragi, Masaru Yokoyama, Tatsuo Shioda, Hironori Sato P24 Regulation of foamy viral env splicing controls gag and pol expression Jochen Bodem, Rebecca Moschall, Sarah Denk, Steffen Erkelenz, Christian Schenk, Heiner Schaal Topic 5: Assembly & release P25 Transfer of HTLV-1 p8 to target T cells depends on VASP: a novel interaction partner of p8 Norbert Donhauser, Ellen Socher, Sebastian Millen, Heinrich Sticht, Andrea K. Thoma-Kress P26 COL4A1 and COL4A2 are novel HTLV-1 tax targets with a putative role in virus transmission Christine Gross, Sebastian Millen, Melanie Mann, Klaus Überla, Andrea K. Thoma-Kress P27 The C terminus of foamy virus gag protein is required for particle formation, and virus budding: starting assembly at the C terminus? Guochao Wei, Matthew J. Betts, Yang Liu, Timo Kehl, Robert B. Russell, Martin Löchelt P28 Generation of an antigen-capture ELISA and analysis of Rec and Staufen-1 effects on HERV-K(HML-2) virus particle production Oliver Hohn, Saeed Mostafa, Kirsten Hanke, Stephen Norley, Norbert Bannert P29 Antagonism of BST-2/tetherin is a conserved function of primary HIV-2 Env glycoproteins Chia-Yen Chen, Masashi Shingai, Pedro Borrego, Nuno Taveira, Klaus Strebel P30 Mutations in the packaging signal region of the HIV-1 genome cause a late domain mutant phenotype Chris Hellmund, Bo Meng, Andrew Lever P31 p6 regulates membrane association of HIV-1 gag Melanie Friedrich, Friedrich Hahn, Christian Setz, Pia Rauch, Kirsten Fraedrich, Alina Matthaei, Petra Henklein, Maximilian Traxdorf, Torgils Fossen, Ulrich Schubert Topic 6: Pathogenesis & evolution P32 Molecular and structural basis of protein evolution during viral adaptation Aya Khwaja, Meytal Galilee, Akram Alian P33 HIV-1 enhancement and neutralisation by soluble gp120 and its role for the selection of the R5-tropic “best fit” Birco Schwalbe, Heiko Hauser, Michael Schreiber P34 An insertion of seven amino acids in the Env cytoplasmic tail of Human Immunodeficiency Virus type 2 (HIV-2) selected during disease progression enhances viral replication François Dufrasne, Mara Lucchetti, Patrick Goubau, Jean Ruelle P35 Cell-associated HIV-1 unspliced to multiply spliced RNA ratio at 12 weeks ART correlates with markers of immune activation and apoptosis and predicts the CD4 T-cell count at 96 weeks ART Mirte Scherpenisse, Ben Berkhout, Alexander Pasternak P36 Faster progression in non-B subtype HIV-1-infected patients than Korean subclade of subtype B is accompanied by higher variation and no induction of gross deletion in non-B nef gene by Korean red ginseng treatment Young-Keol Cho, Jungeun Kim, Daeun Jeong P37 Aberrant expression of ERVWE1 endogenous retrovirus and overexpression of TET dioxygenases are characteristic features of seminoma Katerina Trejbalova, Martina Benesova, Dana Kucerova, Zdenka Vernerova, Rachel Amouroux, Petra Hajkova, Jiri Hejnar P38 Life history of the oldest lentivirus: characterisation of ELVgv integrations and the TRIM5 selection pattern in dermoptera Daniel Elleder, Tomas Hron, Helena Farkasova, Abinash Padhi, Jan Paces P39 Characterisation of a highly divergent endogenous retrovirus in the equine germ line Henan Zhu, Robert Gifford, Pablo Murcia P40 The emergence of pandemic retroviral infection in small ruminants Maria Luisa Carrozza, Anna-Maria Niewiadomska, Maurizio Mazzei, Mounir Abi-Said, Joseph Hughes, Stéphane Hué, Robert Gifford P41 Near full-length genome (NFLG) Characterisation of HIV-1 subtype B identified in South Africa Adetayo Obasa, Graeme Jacobs, Susan Engelbrecht P42 Acquisition of Vpu-mediated tetherin antagonism by an HIV-1 group O strain Katharina Mack, Kathrin Starz, Daniel Sauter, Matthias Geyer, Frederic Bibollet-Ruche, Christina Stürzel, Marie Leoz, Jean Christophe Plantier, Beatrice H. Hahn, Frank Kirchhoff P43 The human endogenous retrovirus type K is involved in cancer stem cell markers expression and in human melanoma malignancy Ayele Argaw-Denboba, Emanuela Balestrieri, Annalucia Serafino, Ilaria Bucci, Chiara Cipriani, Corrado Spadafora, Paolo Sinibaldi-Vallebona, Claudia Matteucci P44 Natural infection of Indian non-human primates by unique lentiviruses S. Nandi Jayashree, Ujjwal Neogi, Anil K. Chhangani, Shravan Sing Rathore, Bajrang R. J. Mathur P45 Free cervical cancer screening among HIV-positive women receiving antiretroviral treatment in Nigeria Adeyemi Abati P46 Molecular evolutionary status of feline immunodeficiency virus in Turkey B. Taylan Koç, Tuba Çiğdem Oğuzoğlu Topic 7: Innate sensing & intrinsic immunity P47 Cell-to-cell contact with HTLV-1-infected T cells reduces dendritic cell immune functions and contributes to infection in trans. Takatoshi Shimauchi, Stephan Caucheteux, Jocelyn Turpin, Katja Finsterbusch, Charles Bangham, Yoshiki Tokura, Vincent Piguet P48 Deciphering the mechanisms of HIV-1 exacerbation induced by Mycobacterium tuberculosis in monocytes/macrophages Shanti Souriant, Luciana Balboa, Karine Pingris, Denise Kviatcowsky, Brigitte Raynaud-Messina, Céline Cougoule, Ingrid Mercier, Marcelo Kuroda, Pablo González-Montaner, Sandra Inwentarz, Eduardo Jose Moraña, Maria del Carmen Sasiain, Olivier Neyrolles, Isabelle Maridonneau-Parini, Geanncarlo Lugo-Villarino, Christel Vérollet P49 The SAMHD1-mediated inhibition of LINE-1 retroelements is regulated by phosphorylation Alexandra Herrmann, Sabine Wittmann, Caitlin Shepard, Dominique Thomas, Nerea Ferreirós Bouzas, Baek Kim, Thomas Gramberg P50 Activities of nuclear envelope protein SUN2 in HIV infection Xavier Lahaye, Anvita Bhargava, Takeshi Satoh, Matteo Gentili, Silvia Cerboni, Aymeric Silvin, Cécile Conrad, Hakim Ahmed-Belkacem, Elisa C. Rodriguez, Jean-François Guichou, Nathalie Bosquet, Matthieu Piel, Roger Le Grand, Megan King, Jean-Michel Pawlotsky, Nicolas Manel P51 Activation of TLR7/8 with a small molecule agonist induces a novel restriction to HIV-1 infection of monocytes Henning Hofmann, Benedicte Vanwalscappel, Nicolin Bloch, Nathaniel Landau P52 Steady state between the DNA polymerase and Rnase H domain activities of reverse transcriptases determines the sensitivity of retroviruses to inhibition by APOBEC3 proteins Stanislav Indik, Benedikt Hagen P53 HIV restriction in mature dendritic cells is related to p21 induction and p21-mediated control of the dNTP pool and SAMHD1 activity. José Carlos Valle-Casuso, Awatef Allouch, Annie David, Françoise Barré-Sinoussi, Michaela Müller-Trutwin, Monsef Benkirane, Gianfranco Pancino, Asier Saez-Cirion P54 IFITM protens restrict HIV-1 protein synthesis Wing-Yiu Lee, Chen Liang, Richard Sloan P55 Characterisation and functional analysis of the novel restriction factor Serinc5 Bianca Schulte, Silvana Opp, Felipe Diaz-Griffero P56 piRNA sequences are common in Human Endogenous Retroviral Sequences (HERVs): An antiretroviral restriction mechanism? Jonas Blomberg, Luana Vargiu, Patricia Rodriguez-Tomé, Enzo Tramontano, Göran Sperber P57 Ferroportin restricts HIV-1 infection in sickle cell disease Namita Kumari, Tatiana Ammosova, Sharmeen Diaz, Patricia Oneal, Sergei Nekhai P58 APOBEC3G modulates the response to antiretroviral drugs in humanized mice Audrey Fahrny, Gustavo Gers-Huber, Annette Audigé, Roberto F. Speck, Anitha Jayaprakash, Ravi Sachidanandam, Matt Hernandez, Marsha Dillon-White, Viviana Simon P59 High-throughput epigenetic analysis of evolutionarily young endogenous retrovirus presents in the mule deer (Odocoileus hemionus) genome Tomas Hron, Helena Farkasova, Daniel Elleder P60 Characterisation of the expression of novel endogenous retroviruses and immune interactions in a macaque model Neil Berry, Emmanuel Maze, Claire Ham, Neil Almond, Greg Towers, Robert Belshaw P61 HIV-1 restriction by orthologs of SERINC3 and SERINC5 Patrícia de Sousa-Pereira, Joana Abrantes, Massimo Pizzato, Pedro J. Esteves, Oliver T. Fackler, Oliver T. Keppler, Hanna-Mari Baldauf P62 TRIM19/PML restricts HIV infection in a cell type-dependent manner Bianca Volkmann, Tanja Kahle, Kristin Eissmann, Alexandra Herrmann, Sven Schmitt, Sabine Wittmann, Laura Merkel, Nina Reuter, Thomas Stamminger, Thomas Gramberg P63 Recent invasion of the mule deer genome by a retrovirus Helena Farkasova, Tomas Hron, Daniel Elleder P64 Does the antiviral protein SAMHD1 influence mitochondrial function? Ilaria Dalla Rosa, Kate Bishop, Antonella Spinazzola, Harriet Groom P65 cGAMP transfers intercellularly via HIV-1 Env-mediated cell–cell fusion sites and triggers an innate immune response in primary target cells Shuting Xu, Aurélie Ducroux, Aparna Ponnurangam, Sergej Franz, Gabrielle Vieyres, Mathias Müsken, Thomas Zillinger, Angelina Malassa, Ellen Ewald, Veit Hornung, Winfried Barchet, Susanne Häussler, Thomas Pietschmann, Christine Goffinet P66 Pre-infection transcript levels of FAM26F in PBMCS inform about overall plasma viral load in acute and postacute phase after SIV-infection Ulrike Sauermann, Aneela Javed, Nicole Leuchte, Gabriela Salinas, Lennart Opitz, Christiane Stahl-Hennig, Sieghart Sopper P67 Sequence-function analysis of three T cell receptors targeting the HIV-1 p17 epitope SLYNTVATL Christiane Mummert, Christian Hofmann, Angela G. Hückelhoven, Silke Bergmann, Sandra M. Müller-Schmucker, Ellen G. Harrer, Jan Dörrie, Niels Schaft, Thomas Harrer P68 An immunodominant region of the envelope glycoprotein of small ruminant lentiviruses may function as decoy antigen Laure Cardinaux, M.-L. Zahno, H.-R. Vogt, R. Zanoni, G. Bertoni P69 Impact of immune activation, immune exhaustion, broadly neutralising antibodies and viral reservoirs on disease progression in HIV-infected children Maximilian Muenchhoff, Philip Goulder, Oliver Keppler Topic 9: Novel antiviral strategies P70 Identification of natural compounds as new antiviral products by bioassay-guided fractionation Alexandra Herrmann, Stephanie Rebensburg, Markus Helfer, Michael Schindler, Ruth Brack-Werner P71 The PPARG antagonism disconnects the HIV replication and effector functions in Th17 cells Yuwei Zhang, Huicheng Chen, Delphine Planas, Annie Bernier, Annie Gosselin, Jean-Pierre Routy, Petronela Ancuta P72 Characterisation of a multiresistant subtype AG reverse transcriptase: AZT resistance, sensitivity to RNase H inhibitors and inhibitor binding Birgitta Wöhrl, Anna Schneider, Angela Corona, Imke Spöring, Mareike Jordan, Bernd Buchholz, Elias Maccioni, Roberto Di Santo, Jochen Bodem, Enzo Tramontano, Kristian Schweimer P73 Insigths into the acetylation pattern of HDAC inhibitors and their potential role in HIV therapy Christian Schölz, Brian Weinert, Sebastian Wagner, Petra Beli, Yasuyuki Miyake, Jun Qi, Lars Jensen, Werner Streicher, Anna McCarthy, Nicholas Westwood, Sonia Lain, Jürgen Cox, Patrick Matthias, Matthias Mann, James Bradner, Chunaram Choudhary P74 HPV-derived and seminal amyloid peptides enhance HIV-1 infection and impair the efficacy of broadly neutralising antibodies and antiretroviral drugs Marcel Stern, Oliver T. Keppler P75 D(−)lentiginosine inhibits both proliferation and virus expression in cells infected by HTLV-1 in vitro Elena Valletta, Caterina Frezza, Claudia Matteucci, Francesca Marino-Merlo, Sandro Grelli, Anna Lucia Serafino, Antonio Mastino, Beatrice Macchi P76 HIV-1 resistance analyses of the Cape Winelands districts, South Africa Sello Mikasi, Graeme Jacobs, Susan Engelbrecht Topic 10: Recent advances in HIV vaccine development P77 Induction of complex retrovirus antigen-specific immune responses by adenovirus-based vectors depends on the order of vector administration Meike Kaulfuß, Sonja Windmann, Wibke Bayer P78 Direct impact of structural properties of HIV-1 Env on the regulation of the humoral immune response Rebecca Heß, Michael Storcksdieck gen. Bonsmann, Viktoria Stab, Carsten Kirschning, Bernd Lepenies, Matthias Tenbusch, Klaus Überla P79 Lentiviral virus-like particles mediate gerenration of T-follicular helper cells in vitro Anne Kolenbrander, Klaus Überla, Vladimir Temchura P80 Recruitment of HIV-1 Vpr to DNA damage sites and protection of proviral DNA from nuclease activity Kenta Iijima, Junya Kobayashi, Yukihito Ishizaka
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Ghosh S, Avellini T, Petrelli A, Kriegel I, Gaspari R, Almeida G, Bertoni G, Cavalli A, Scotognella F, Pellegrino T, Manna L. Colloidal CuFeS 2 Nanocrystals: Intermediate Fe d-Band Leads to High Photothermal Conversion Efficiency. Chem Mater 2016; 28:4848-4858. [PMID: 29033496 PMCID: PMC5634747 DOI: 10.1021/acs.chemmater.6b02192] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 06/01/2016] [Indexed: 05/21/2023]
Abstract
We describe the colloidal hot-injection synthesis of phase-pure nanocrystals (NCs) of a highly abundant mineral, chalcopyrite (CuFeS2). Absorption bands centered at around 480 and 950 nm, spanning almost the entire visible and near-infrared regions, encompass their optical extinction characteristics. These peaks are ascribable to electronic transitions from the valence band (VB) to the empty intermediate band (IB), located in the fundamental gap and mainly composed of Fe 3d orbitals. Laser-irradiation (at 808 nm) of an aqueous suspension of CuFeS2 NCs exhibited significant heating, with a photothermal conversion efficiency of 49%. Such efficient heating is ascribable to the carrier relaxation within the broad IB band (owing to the indirect VB-IB gap), as corroborated by transient absorption measurements. The intense absorption and high photothermal transduction efficiency (PTE) of these NCs in the so-called biological window (650-900 nm) make them suitable for photothermal therapy as demonstrated by tumor cell annihilation upon laser irradiation. The otherwise harmless nature of these NCs in dark conditions was confirmed by in vitro toxicity tests on two different cell lines. The presence of the deep Fe levels constituting the IB is the origin of such enhanced PTE, which can be used to design other high performing NC photothermal agents.
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Affiliation(s)
- Sandeep Ghosh
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Tommaso Avellini
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Alessia Petrelli
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Ilka Kriegel
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Roberto Gaspari
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Guilherme Almeida
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Giovanni Bertoni
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
- IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy
| | - Andrea Cavalli
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Francesco Scotognella
- Dipartimento
di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Teresa Pellegrino
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Department of Nanochemistry, CompuNet, and Department of
Drug Discovery and Development, Istituto
Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
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