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Rubio-Giménez V, Carraro F, Hofer S, Fratschko M, Stassin T, Rodríguez-Hermida S, Schrode B, Barba L, Resel R, Falcaro P, Ameloot R. Polymorphism and orientation control of copper-dicarboxylate metal-organic framework thin films through vapour- and liquid-phase growth. CrystEngComm 2024; 26:1071-1076. [PMID: 38384732 PMCID: PMC10877460 DOI: 10.1039/d3ce01296d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 02/02/2024] [Indexed: 02/23/2024]
Abstract
Precise control over the crystalline phase and crystallographic orientation within thin films of metal-organic frameworks (MOFs) is highly desirable. Here, we report a comparison of the liquid- and vapour-phase film deposition of two copper-dicarboxylate MOFs starting from an oriented metal hydroxide precursor. X-ray diffraction revealed that the vapour- or liquid-phase reaction of the linker with this precursor results in different crystalline phases, morphologies, and orientations. Pole figure analysis showed that solution-based growth of the MOFs follows the axial texture of the metal hydroxide precursor, resulting in heteroepitaxy. In contrast, the vapour-phase method results in non-epitaxial growth with uniplanar texture only.
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Affiliation(s)
- Víctor Rubio-Giménez
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy (cMACS), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Francesco Carraro
- Institute of Physical and Theoretical Chemistry, Graz University of Technology Stremayrgasse 9/Z2 8010 Graz Austria
| | - Sebastian Hofer
- Institute of Solid State Physics, Graz University of Technology Petersgasse 16 8010 Graz Austria
| | - Mario Fratschko
- Institute of Solid State Physics, Graz University of Technology Petersgasse 16 8010 Graz Austria
| | - Timothée Stassin
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy (cMACS), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Sabina Rodríguez-Hermida
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy (cMACS), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Benedikt Schrode
- Institute of Solid State Physics, Graz University of Technology Petersgasse 16 8010 Graz Austria
| | - Luisa Barba
- Istituto di Cristallografia - Sincrotrone Elettra, Consiglio Nazionale delle Ricerche Area Science Park 34142 Basovizza Italy
| | - Roland Resel
- Institute of Solid State Physics, Graz University of Technology Petersgasse 16 8010 Graz Austria
| | - Paolo Falcaro
- Institute of Physical and Theoretical Chemistry, Graz University of Technology Stremayrgasse 9/Z2 8010 Graz Austria
| | - Rob Ameloot
- Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy (cMACS), KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
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2
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Basso F, Ciuffarin F, Chiodetti M, Alinovi M, Carini E, Barba L, Manzocco L, Nicoli MC, Calligaris S. Effect of moderate hydrostatic pressure on crystallization of palm kernel stearin-sunflower oil model systems. Curr Res Food Sci 2024; 8:100700. [PMID: 38435277 PMCID: PMC10907390 DOI: 10.1016/j.crfs.2024.100700] [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: 11/18/2023] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 03/05/2024] Open
Abstract
Lipid crystallization under moderate hydrostatic pressure treatments (200 MPa, 20 °C, 1-24 h) was studied in palm kernel stearin (PS 100%) and its blends with sunflower oil (PS 80, 90 % w/w). Hyperbarically-crystallized samples exhibited significantly higher firmness, elastic modulus and critical stress values as compared to those of the samples crystallized at atmospheric pressure. These data indicate that moderate hydrostatic pressure favored the formation of a higher amount of small palm kernel stearin crystals as compared to those formed at atmospheric pressure. Pressurization did not affect fat polymorphism, but was able to enhance nucleation instead of crystal growth. This work clearly demonstrated the efficacy of moderate hydrostatic pressure in steering lipid crystallization, opening interesting possible applications of high-pressure processing technology in the fat manufacturing sector.
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Affiliation(s)
- Federico Basso
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/A, 33100, Udine, Italy
| | - Francesco Ciuffarin
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/A, 33100, Udine, Italy
| | - Miriam Chiodetti
- Department of Food and Drug, University of Parma, Parco Area delle Scienze, 47/A, 43124, Parma, Italy
| | - Marcello Alinovi
- Department of Food and Drug, University of Parma, Parco Area delle Scienze, 47/A, 43124, Parma, Italy
| | - Eleonora Carini
- Department of Food and Drug, University of Parma, Parco Area delle Scienze, 47/A, 43124, Parma, Italy
| | - Luisa Barba
- Institute of Crystallography, National Council of Research, 34100, Trieste, Italy
| | - Lara Manzocco
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/A, 33100, Udine, Italy
| | - Maria Cristina Nicoli
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/A, 33100, Udine, Italy
| | - Sonia Calligaris
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via Sondrio 2/A, 33100, Udine, Italy
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3
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Milita S, Zaquin T, Fermani S, Montroni D, Pinkas I, Barba L, Falini G, Mass T. Assembly of the Intraskeletal Coral Organic Matrix during Calcium Carbonate Formation. Cryst Growth Des 2023; 23:5801-5811. [PMID: 37547884 PMCID: PMC10401569 DOI: 10.1021/acs.cgd.3c00401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 07/01/2023] [Indexed: 08/08/2023]
Abstract
Scleractinia coral skeleton formation occurs by a heterogeneous process of nucleation and growth of aragonite in which intraskeletal soluble organic matrix molecules, usually referred to as SOM, play a key role. Several studies have demonstrated that they influence the shape and polymorphic precipitation of calcium carbonate. However, the structural aspects that occur during the growth of aragonite have received less attention. In this research, we study the deposition of calcium carbonate on a model substrate, silicon, in the presence of SOM extracted from the skeleton of two coral species representative of different living habitats and colonization strategies, which we previously characterized. The study is performed mainly by grazing incidence X-ray diffraction with the support of Raman spectroscopy and electron and optical microscopies. The results show that SOM macromolecules once adsorbed on the substrate self-assembled in a layered structure and induced the oriented growth of calcite, inhibiting the formation of vaterite. Differently, when SOM macromolecules were dispersed in solution, they induced the deposition of amorphous calcium carbonate (ACC), still preserving a layered structure. The entity of these effects was species-dependent, in agreement with previous studies. In conclusion, we observed that in the setup required by the experimental procedure, the SOM from corals appears to present a 2D lamellar structure. This structure is preserved when the SOM interacts with ACC but is lost when the interaction occurs with calcite. This knowledge not only is completely new for coral biomineralization but also has strong relevance in the study of biomineralization on other organisms.
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Affiliation(s)
- Silvia Milita
- CNR—Institute
for Microelectronic and Microsystems, via Gobetti 101, Bologna 40129, Italy
| | - Tal Zaquin
- Department
of Marine Biology, The Leon H. Charney School of Marine Sciences, University of Haifa, Mt. Carmel, Haifa 3498838, Israel
| | - Simona Fermani
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via Selmi 2, Bologna 40126, Italy
- Interdepartmental
Centre for Industrial Research Health Sciences & Technologie, University of Bologna, Bologna 40064, Italy
| | - Devis Montroni
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via Selmi 2, Bologna 40126, Italy
| | - Iddo Pinkas
- Department
of Chemical Research Support, Weizmann Institute
of Science, Rehovot 76100, Israel
| | - Luisa Barba
- CNR
-Institute
of Crystallography, Elettra Synchrotron, Trieste I-34100, Italy
| | - Giuseppe Falini
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via Selmi 2, Bologna 40126, Italy
- CNR,
Institute for Nanostructured
Materials, via Gobetti
101, Bologna 40129, Italy
| | - Tali Mass
- Department
of Marine Biology, The Leon H. Charney School of Marine Sciences, University of Haifa, Mt. Carmel, Haifa 3498838, Israel
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4
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Ciuffarin F, Alongi M, Peressini D, Barba L, Lucci P, Calligaris S. Role of the polyphenol content on the structuring behavior of liposoluble gelators in extra virgin olive oil. Food Chem 2023; 412:135572. [PMID: 36724719 DOI: 10.1016/j.foodchem.2023.135572] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 12/22/2022] [Accepted: 01/23/2023] [Indexed: 01/26/2023]
Abstract
The role of polyphenols in affecting the structural and rheological properties of oleogels was investigated. Polyphenols were selectively removed from extra virgin olive oil (EVOO), and the resulting oils at three different polyphenol levels were gelled by using 10% (w/w) of monoglycerides (MG), rice wax (RW), sunflower wax (SW), and a mixture of β-sitosterol/γ-oryzanol (PS). The structural characteristics of oleogels were assessed by visual appearance, rheology, polarized light microscopy, calorimetry, XRD, and FTIR. Polyphenol content differently affected oleogel characteristics depending on network features. While EVOO-polyphenols did not influence PS- and SW-based oleogels, they reinforced MG- and RW-based oleogel network. As polyphenol content increased, the critical stress and melting temperature also increased, concomitantly with changes in crystal morphology. This was attributed to the capacity of polyphenols to form additional junction points in the crystalline network.
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Affiliation(s)
- Francesco Ciuffarin
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy
| | - Marilisa Alongi
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy.
| | - Donatella Peressini
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy
| | - Luisa Barba
- Institute of Crystallography, National Council of Research, 34100 Trieste, Italy
| | - Paolo Lucci
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy
| | - Sonia Calligaris
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy
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5
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Basiricò L, Fratelli I, Verdi M, Ciavatti A, Barba L, Cesarini O, Bais G, Polentarutti M, Chiari M, Fraboni B. Mixed 3D-2D Perovskite Flexible Films for the Direct Detection of 5 MeV Protons. Adv Sci (Weinh) 2022; 10:e2204815. [PMID: 36437046 PMCID: PMC9811469 DOI: 10.1002/advs.202204815] [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: 08/21/2022] [Revised: 11/04/2022] [Indexed: 06/16/2023]
Abstract
This study reports on a novel, flexible, proton beam detector based on mixed 3D-2D perovskite films deposited by solution onto thin plastic foils. The 3D-2D mixture allows to obtain micrometer-thick and highly uniform films that constitute the detector's active layer. The devices demonstrate excellent flexibility with stable electric transport properties down to a bending radius of 3.1 mm. The detector is characterized under a 5 MeV proton beam with fluxes in the range [4.5 × 105 - 1.4 × 109 ] H+ cm-2 s-1 , exhibiting a stable response to repetitive irradiation cycles with sensitivity up to (290 ± 40) nC Gy-1 mm-3 and a limit of detection down to (72±2) µGy s-1 . The detector radiation tolerance is also assessed up to a total of 1.7 × 1012 protons impinging on the beam spot area, with a maximum variation of the detector's response of 14%.
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Affiliation(s)
- Laura Basiricò
- Department of Physics and AstronomyUniversity of BolognaBologna40127Italy
- National Institute for Nuclear PhysicsINFN section of BolognaBologna40127Italy
| | - Ilaria Fratelli
- Department of Physics and AstronomyUniversity of BolognaBologna40127Italy
- National Institute for Nuclear PhysicsINFN section of BolognaBologna40127Italy
| | - Matteo Verdi
- Department of Physics and AstronomyUniversity of BolognaBologna40127Italy
- National Institute for Nuclear PhysicsINFN section of BolognaBologna40127Italy
| | - Andrea Ciavatti
- Department of Physics and AstronomyUniversity of BolognaBologna40127Italy
- National Institute for Nuclear PhysicsINFN section of BolognaBologna40127Italy
| | - Luisa Barba
- National Council of ResearchInstitute of CrystallographyTrieste34149Italy
| | - Olivia Cesarini
- National Institute for Nuclear PhysicsINFNLaboratori Nazionali di LegnaroLegnaro35020Italy
| | | | | | - Massimo Chiari
- National Institute for Nuclear PhysicsINFN section of FirenzeSesto Fiorentino50019Italy
| | - Beatrice Fraboni
- Department of Physics and AstronomyUniversity of BolognaBologna40127Italy
- National Institute for Nuclear PhysicsINFN section of BolognaBologna40127Italy
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6
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Mazzola F, Chaluvadi SK, Polewczyk V, Mondal D, Fujii J, Rajak P, Islam M, Ciancio R, Barba L, Fabrizio M, Rossi G, Orgiani P, Vobornik I. Disentangling Structural and Electronic Properties in V 2O 3 Thin Films: A Genuine Nonsymmetry Breaking Mott Transition. Nano Lett 2022; 22:5990-5996. [PMID: 35787096 DOI: 10.1021/acs.nanolett.2c02288] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Phase transitions are key in determining and controlling the quantum properties of correlated materials. Here, by using the combination of material synthesis and photoelectron spectroscopy, we demonstrate a genuine Mott transition undressed of any symmetry breaking side effects in the thin films of V2O3. In particular and in contrast with the bulk V2O3, we unveil the purely electronic dynamics approaching the metal-insulator transition, disentangled from the structural transformation that is prevented by the residual substrate-induced strain. On approaching the transition, the spectral signal evolves slowly over a wide temperature range, the Fermi wave-vector does not change, and the critical temperature is lower than the one reported for the bulk. Our findings are fundamental in demonstrating the universal benchmarks of a genuine nonsymmetry breaking Mott transition, extendable to a large array of correlated quantum systems, and hold promise of exploiting the metal-insulator transition by implementing V2O3 thin films in devices.
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Affiliation(s)
- Federico Mazzola
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | | | - Vincent Polewczyk
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Debashis Mondal
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Jun Fujii
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Piu Rajak
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Mahabul Islam
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Regina Ciancio
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Luisa Barba
- Istituto di Cristallografia del CNR, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Michele Fabrizio
- International School for Advanced Studies (SISSA), Via Bonomea 265, I-34149 Trieste, Italy
| | - Giorgio Rossi
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
- University of Milano, Via Celoria 16, I-20133 Milano, Italy
| | - Pasquale Orgiani
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
| | - Ivana Vobornik
- CNR-IOM, Area Science Park, Strada Statale 14 km 163.5, I-34149 Trieste, Italy
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7
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Holzer V, Schrode B, Simbrunner J, Hofer S, Barba L, Resel R, Werzer O. Impact of sample misalignment on grazing incidence x-ray diffraction patterns and the resulting unit cell determination. Rev Sci Instrum 2022; 93:063906. [PMID: 35778026 DOI: 10.1063/5.0088176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/21/2022] [Indexed: 06/15/2023]
Abstract
Grazing incidence x-ray diffraction (GIXD) is a frequently used tool for the crystallographic characterization of thin films in terms of polymorph identification and determination of the crystallographic lattice parameters. Even full structure solutions are possible. To obtain highly accurate diffraction patterns, the thin film sample has to be aligned carefully with the center of the goniometer, which allows a defined incidence of the primary x-ray beam relative to the sample surface. This work studies the effect of misalignment of a thin film sample on the acquired diffraction pattern. Three potential types of misalignments are considered: the deviation of the sample surface from the center of the goniometer, an error in the incidence angle of the primary beam, and an inclination of the goniometer rotation axis from the normal of the substrate surface. The consequence of these types of sample misalignments is the shift of diffraction peaks toward specific directions in reciprocal space. Mathematical equations are given that relate the error in positions of Bragg peaks for each type of sample misalignment. Experiments with intentionally misaligned samples confirm the given formulas. In a subsequent step, the errors in the peak positions are translated to systematic errors in the estimation of the unit cell parameters. Depending on the type of misalignment, some alignment errors can be reduced or even corrected; in particular, azimuthal sample rotations prove to be advantageous in these cases. The results in this work improve the quality of GIXD measurements, in general, enabling deeper analysis like the full structure solution from the GIXD pattern on everyday basis.
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Affiliation(s)
- Valentin Holzer
- Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Benedikt Schrode
- Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Josef Simbrunner
- Department of Neuroradiology, Vascular and Interventional Radiology, Medical University Graz, Auenbruggerplatz 9, 8036, Graz, Austria
| | - Sebastian Hofer
- Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Luisa Barba
- Institute of Crystallography, CNR, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Roland Resel
- Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Oliver Werzer
- JOANNEUM RESEARCH Forschungsgesellschaft mbH, Institute for Surface Technologies and Photonics, Franz-Pichler-Straße 30, 8160 Weiz, Austria
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8
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Calabrese G, Pipitone C, Marini D, Giannici F, Martorana A, Barba L, Summonte C, Masciocchi N, Milita S. Highly Stable Thin Films Based on Novel Hybrid 1D (PRSH)PbX 3 Pseudo-Perovskites. Nanomaterials (Basel) 2021; 11:nano11102765. [PMID: 34685211 PMCID: PMC8539398 DOI: 10.3390/nano11102765] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 11/16/2022]
Abstract
In this study, the structure and morphology, as well as time, ultraviolet radiation, and humidity stability of thin films based on newly developed 1D (PRSH)PbX3 (X = Br, I) pseudo-perovskite materials, containing 1D chains of face-sharing haloplumbate octahedra, are investigated. All films are strongly crystalline already at room temperature, and annealing does not promote further crystallization or film reorganization. The film microstructure is found to be strongly influenced by the anion type and, to a lesser extent, by the DMF/DMSO solvent volume ratio used during film deposition by spin-coating. Comparison of specular X-ray diffraction and complementary grazing incidence X-ray diffraction analysis indicates that the use of DMF/DMSO mixed solvents promotes the strengthening of a dominant 100 or 210 texturing, as compared the case of pure DMF, and that the haloplumbate chains always lie in a plane parallel to the substrate. Under specific DMF/DMSO solvent volume ratios, the prepared films are found to be highly stable in time (up to seven months under fluxing N2 and in the dark) and to highly moist conditions (up to 25 days at 78% relative humidity). Furthermore, for representative (PRSH)PbX3 films, resistance against ultraviolet exposure (λ = 380 nm) is investigated, showing complete stability after irradiation for up to 15 h at a power density of 600 mW/cm2. These results make such thin films interesting for highly stable perovskite-based (opto)electronic devices.
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Affiliation(s)
- Gabriele Calabrese
- Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche, via Gobetti 101, 40129 Bologna, Italy; (D.M.); (C.S.)
- Correspondence: (G.C.); (N.M.); (S.M.)
| | - Candida Pipitone
- Dipartimento di Fisica e Chimica, Università di Palermo, viale delle Scienze, Ed. 17, 90128 Palermo, Italy; (C.P.); (F.G.); (A.M.)
| | - Diego Marini
- Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche, via Gobetti 101, 40129 Bologna, Italy; (D.M.); (C.S.)
| | - Francesco Giannici
- Dipartimento di Fisica e Chimica, Università di Palermo, viale delle Scienze, Ed. 17, 90128 Palermo, Italy; (C.P.); (F.G.); (A.M.)
| | - Antonino Martorana
- Dipartimento di Fisica e Chimica, Università di Palermo, viale delle Scienze, Ed. 17, 90128 Palermo, Italy; (C.P.); (F.G.); (A.M.)
| | - Luisa Barba
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Strada Statale 14-km 163, 5, AREA Science Park, Basovizza, 34149 Trieste, Italy;
| | - Caterina Summonte
- Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche, via Gobetti 101, 40129 Bologna, Italy; (D.M.); (C.S.)
| | - Norberto Masciocchi
- Dipartimento di Scienza e Alta Tecnologia e To.Sca.Lab., Università dell’Insubria, via Valleggio 11, 22100 Como, Italy
- Correspondence: (G.C.); (N.M.); (S.M.)
| | - Silvia Milita
- Istituto per la Microelettronica e Microsistemi, Consiglio Nazionale delle Ricerche, via Gobetti 101, 40129 Bologna, Italy; (D.M.); (C.S.)
- Correspondence: (G.C.); (N.M.); (S.M.)
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9
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Calligaris S, Plazzotta S, Barba L, Manzocco L. Design of Roll‐In Margarine Analogous by Partial Drying of Monoglyceride‐Structured Emulsions. EUR J LIPID SCI TECH 2021. [DOI: 10.1002/ejlt.202000206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sonia Calligaris
- Department of Agricultural Food, Environmental and Animal Sciences University of Udine Via Sondrio 2/A Udine 33100 Italy
| | - Stella Plazzotta
- Department of Agricultural Food, Environmental and Animal Sciences University of Udine Via Sondrio 2/A Udine 33100 Italy
| | - Luisa Barba
- Crystallography Institute of CNR Trieste 34100 Italy
| | - Lara Manzocco
- Department of Agricultural Food, Environmental and Animal Sciences University of Udine Via Sondrio 2/A Udine 33100 Italy
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10
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Vohra V, Matsunaga Y, Takada T, Kiyokawa A, Barba L, Porzio W. Impact of the Electron Acceptor Nature on the Durability and Nanomorphological Stability of Bulk Heterojunction Active Layers for Organic Solar Cells. Small 2021; 17:e2004168. [PMID: 33325643 DOI: 10.1002/smll.202004168] [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] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 11/12/2020] [Indexed: 06/12/2023]
Abstract
A systematic study is conducted to compare the performances and stability of active layers employing a high performance electron donor (PBDB-T) combined with state-of-the-art fullerene (PC71 BM), nonfullerene (ITIC), and polymer (N2200) electron acceptors. The impact of the chemical nature of the acceptor on the durability of organic solar cells (OSCs) is elucidated by monitoring their photovoltaic performances under light exposure or dark conditions in the presence of oxygen. PC71 BM molecules exhibit a higher resistance toward oxidation compared to nonfullerene acceptors. Unencapsulated PBDB-T:PC71 BM OSCs display relatively stable performances at room temperature when stored in air for 3 months. However, when exposed to temperatures above 80 °C, their active materials demix causing notable reductions in the short-circuit densities. Such detrimental demixing can also be seen for PBDB-T:ITIC active layers above 120 °C. Although N2200 chains irreversibly degrade when exposed to air, thermally induced demixing does not occur in PBDB-T:N2200 active layers annealed up to 200 °C. In summary, fullerene OSCs may be the best currently available choice for unencapsulated room temperature applications but if oxidation of the polymer acceptors can be avoided, all polymer active layers should enable the fabrication of highly durable OSCs with lifetimes matching the requirements for OSC commercialization.
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Affiliation(s)
- Varun Vohra
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
| | - Yumi Matsunaga
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
| | - Tomoaki Takada
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
| | - Ayumu Kiyokawa
- Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan
| | - Luisa Barba
- Istituto di Cristallografia del CNR - c/o Sincrotrone Elettra, Strada Statale 14-Km, 163, 5 Area Science Park, Basovizza, Trieste, 34142, Italy
| | - William Porzio
- Institute of Chemical Sciences and Technologies "G.Natta" Consiglio Nazionale delle Ricerche (SCI-TEC), via A. Corti 12, Milano, 20133, Italy
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Latini A, Quaranta S, Menchini F, Lisi N, Di Girolamo D, Tarquini O, Colapietro M, Barba L, Demitri N, Cassetta A. A novel water-resistant and thermally stable black lead halide perovskite, phenyl viologen lead iodide C 22H 18N 2(PbI 3) 2. Dalton Trans 2020; 49:2616-2627. [PMID: 32039432 DOI: 10.1039/c9dt04148f] [Citation(s) in RCA: 6] [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: 02/02/2023]
Abstract
A novel black organoammonium iodoplumbate semiconductor, namely phenyl viologen lead iodide C22H18N2(PbI3)2 (PhVPI), was successfully synthesized and characterized. This material showed physical and chemical properties suitable for photovoltaic applications. Indeed, low direct allowed band gap energy (Eg = 1.32 eV) and high thermal stability (up to at least 300 °C) compared to methylammonium lead iodide CH3NH3PbI3 (MAPI, Eg = 1.5 eV) render PhVPI potentially attractive for solar cell fabrication. The compound was extensively characterized by means of X-ray diffraction (performed on both powder and single crystals), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), UV-photoelectron spectroscopy (UPS), FT-IR spectroscopy, TG-DTA, and CHNS analysis. Reactivity towards water was monitored through X-ray powder diffraction carried out after prolonged immersion of the material in water at room temperature. Unlike its methyl ammonium counterpart, PhVPI proved to be unaffected by water exposure. The lack of reactivity towards water is to be attributed to the quaternary nature of the nitrogen atoms of the phenyl viologen units that prevents the formation of acid-base equilibria when in contact with water. On the other hand, PhVPI's thermal stability was evaluated by temperature-controlled powder XRD measurements following an hour-long isothermal treatment at 250 and 300 °C. In both cases no signs of decomposition could be detected. However, the compound melted incongruently at 332 °C producing, upon cooling, a mostly amorphous material. PhVPI was found to be slightly soluble in DMF (∼5 mM) and highly soluble in DMSO. Nevertheless, its solubility in DMF can be dramatically increased by adding an equimolar amount of DMSO. Therefore, phenyl viologen lead iodide can be amenable for the fabrication of solar devices by spin coating as actually done for MAPI-based cells. The crystal structure, determined by means of single crystal X-ray diffraction using synchrotron radiation, turned out to be triclinic and consequently differs from the prototypal perovskite structure. In fact, it comprises infinite double chains of corner-sharing PbI6 octahedra along the a-axis direction with phenyl viologen cations positioned between the columns. Finally, the present determination of PhVPI's electronic band structure achieved through UPS and UV-Vis DRS is instrumental in using the material for solar cells.
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Affiliation(s)
- Alessandro Latini
- Dipartimento di Chimica, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy.
| | - Simone Quaranta
- Dipartimento di Ingegneria dell'Informazione, Elettronica e Telecomunicazioni, Sapienza Università di Roma, Via Eudossiana, 18, 00184 Roma, Italy
| | - Francesca Menchini
- ENEA - Energy Technologies Department, Via Anguillarese, 301, 00123 Roma, Italy
| | - Nicola Lisi
- ENEA - Energy Technologies Department, Via Anguillarese, 301, 00123 Roma, Italy
| | - Diego Di Girolamo
- Dipartimento di Chimica, Sapienza Università di Roma, Piazzale Aldo Moro 5, 00185 Roma, Italy.
| | - Ombretta Tarquini
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia, Via Salaria km 29, 300, 00015 Monterotondo Scalo, Roma, Italy
| | - Marcello Colapietro
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia, Via Salaria km 29, 300, 00015 Monterotondo Scalo, Roma, Italy
| | - Luisa Barba
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia, Sede Secondaria di Trieste, Area Science Park - Basovizza, Strada Statale 14, km 163.5, 34149 Trieste, Italy
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste, Area Science Park - Basovizza, Strada Statale 14, km 163.5, 34149 Trieste, Italy
| | - Alberto Cassetta
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia, Sede Secondaria di Trieste, Area Science Park - Basovizza, Strada Statale 14, km 163.5, 34149 Trieste, Italy
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Kumar A, Naumenko D, Rossi G, Magnano E, Nappini S, Bondino F, Segoloni E, Amidani L, d'Acapito F, Boscherini F, Barba L, Pace E, Benfatto M, Casassa S, Pedio M. The effect of long-range order on intermolecular interactions in organic semiconductors: zinc octaethyl porphyrin molecular thin film model systems. Phys Chem Chem Phys 2019; 21:22966-22975. [PMID: 31599284 DOI: 10.1039/c9cp00954j] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to optimize the performance of devices based on porphyrin thin films it is of great importance to gain a physical understanding of the various factors which affect their charge transport and light-harvesting properties. In this work, we have employed a multi-technique approach to study vacuum deposited zinc octaethyl porphyrin (ZnOEP) thin films with different degrees of long-range order as model systems. An asymmetrical stretching of the skeletal carbon atoms of the porphyrin conformer has been observed and attributed to ordered molecular stacking and intermolecular interactions. For ordered films, a detailed fitting analysis of the X-ray absorption near edge structure (XANES) using the MXAN code establishes a symmetry reduction in the molecular conformer involving the skeletal carbon atoms of the porphyrin ring; this highlights the consequences of increased π-π stacking of ZnOEP molecules adopting the triclinic structure. The observed asymmetrical stretching of the π conjugation network of the porphyrin structure can have significant implications for charge transport and light harvesting, significantly influencing the performance of porphyrin based devices.
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Affiliation(s)
- A Kumar
- Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, TASC Laboratory, Trieste, Italy.
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Hatterer E, Chauchet X, Barba L, Richard F, Moine V, Chatel L, Cons L, Ravn U, Masternak K, Fischer N, Kosco-Vilbois M, Ferlin W, Buatois V, Shang L. Targeting a membrane-proximal epitope on mesothelin increases the tumoricidal activity of a bispecific antibody blocking CD47 on tumor cells. Eur J Cancer 2019. [DOI: 10.1016/j.ejca.2019.01.053] [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: 10/27/2022]
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14
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D'Annibale A, Panetta R, Tarquini O, Colapietro M, Quaranta S, Cassetta A, Barba L, Chita G, Latini A. Synthesis, physico-chemical characterization and structure of the elusive hydroxylammonium lead iodide perovskite NH3OHPbI3. Dalton Trans 2019; 48:5397-5407. [DOI: 10.1039/c9dt00690g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The elusive hydroxylammonium lead iodide NH3OHPbI3 has been successfully synthesized and characterized for the first time.
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Affiliation(s)
- Andrea D'Annibale
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Riccardo Panetta
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- 00185 Roma
- Italy
| | - Ombretta Tarquini
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia
- Roma
- Italy
| | | | - Simone Quaranta
- Dipartimento di Ingegneria dell'Informazione
- Elettronica e Telecomunicazioni
- Università degli Studi di Roma “La Sapienza”
- 00184 Roma
- Italy
| | - Alberto Cassetta
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia
- Sede Secondaria di Trieste
- 34149 Trieste
- Italy
| | - Luisa Barba
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia
- Sede Secondaria di Trieste
- 34149 Trieste
- Italy
| | - Giuseppe Chita
- Consiglio Nazionale delle Ricerche - Istituto di Cristallografia
- Sede Secondaria di Trieste
- 34149 Trieste
- Italy
| | - Alessandro Latini
- Dipartimento di Chimica
- Università degli Studi di Roma “La Sapienza”
- 00185 Roma
- Italy
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15
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Calligaris S, Valoppi F, Barba L, Anese M, Nicoli MC. β-Carotene degradation kinetics as affected by fat crystal network and solid/liquid ratio. Food Res Int 2018; 105:599-604. [DOI: 10.1016/j.foodres.2017.11.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 11/08/2017] [Accepted: 11/24/2017] [Indexed: 12/01/2022]
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Fayaz G, Goli SAH, Kadivar M, Valoppi F, Barba L, Balducci C, Conte L, Calligaris S, Nicoli MC. Pomegranate seed oil organogels structured by propolis wax, beeswax, and their mixture. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201700032] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Goly Fayaz
- Department of Food Science and Technology; College of Agriculture; Isfahan University of Technology; Isfahan Iran
| | - Sayed Amir Hossein Goli
- Department of Food Science and Technology; College of Agriculture; Isfahan University of Technology; Isfahan Iran
| | - Mahdi Kadivar
- Department of Food Science and Technology; College of Agriculture; Isfahan University of Technology; Isfahan Iran
| | - Fabio Valoppi
- Istituto di Cristallografia; ConsiglioNazionaledelleRicerche; Trieste Italy
| | - Luisa Barba
- Istituto di Cristallografia; ConsiglioNazionaledelleRicerche; Trieste Italy
| | | | - Lanfranco Conte
- Dipartimento di ScienzeAgroalimentari; Ambientali e Animali, Università di Udine; Udine Italy
| | - Sonia Calligaris
- Dipartimento di ScienzeAgroalimentari; Ambientali e Animali, Università di Udine; Udine Italy
| | - Maria Cristina Nicoli
- Dipartimento di ScienzeAgroalimentari; Ambientali e Animali, Università di Udine; Udine Italy
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Manzoni G, Gragnaniello L, Autès G, Kuhn T, Sterzi A, Cilento F, Zacchigna M, Enenkel V, Vobornik I, Barba L, Bisti F, Bugnon P, Magrez A, Strocov VN, Berger H, Yazyev OV, Fonin M, Parmigiani F, Crepaldi A. Evidence for a Strong Topological Insulator Phase in ZrTe_{5}. Phys Rev Lett 2016; 117:237601. [PMID: 27982645 DOI: 10.1103/physrevlett.117.237601] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Indexed: 05/05/2023]
Abstract
The complex electronic properties of ZrTe_{5} have recently stimulated in-depth investigations that assigned this material to either a topological insulator or a 3D Dirac semimetal phase. Here we report a comprehensive experimental and theoretical study of both electronic and structural properties of ZrTe_{5}, revealing that the bulk material is a strong topological insulator (STI). By means of angle-resolved photoelectron spectroscopy, we identify at the top of the valence band both a surface and a bulk state. The dispersion of these bands is well captured by ab initio calculations for the STI case, for the specific interlayer distance measured in our x-ray diffraction study. Furthermore, these findings are supported by scanning tunneling spectroscopy revealing the metallic character of the sample surface, thus confirming the strong topological nature of ZrTe_{5}.
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Affiliation(s)
- G Manzoni
- Universitá degli Studi di Trieste, Via Alfonso Valerio 2, Trieste 34127, Italy
| | - L Gragnaniello
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - G Autès
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- National Centre for Computational Design and Discovery of Novel Materials MARVEL, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - T Kuhn
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - A Sterzi
- Universitá degli Studi di Trieste, Via Alfonso Valerio 2, Trieste 34127, Italy
| | - F Cilento
- Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, Trieste I-34149, Italy
| | - M Zacchigna
- Officina dei Materiali (IOM)-CNR, Laboratorio TASC, Area Science Park - Basovizza, I-34149 Trieste, Italy
| | - V Enenkel
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - I Vobornik
- Officina dei Materiali (IOM)-CNR, Laboratorio TASC, Area Science Park - Basovizza, I-34149 Trieste, Italy
| | - L Barba
- Institute of Crystallography, CNR, Area Science Park, Strada Statale 14, km 163.5 Trieste I-34149, Italy
| | - F Bisti
- Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
| | - Ph Bugnon
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - A Magrez
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - V N Strocov
- Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
| | - H Berger
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - O V Yazyev
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- National Centre for Computational Design and Discovery of Novel Materials MARVEL, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - M Fonin
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - F Parmigiani
- Universitá degli Studi di Trieste, Via Alfonso Valerio 2, Trieste 34127, Italy
- Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, Trieste I-34149, Italy
- International Faculty, University of Köln, 50937 Köln, Germany
| | - A Crepaldi
- Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, Trieste I-34149, Italy
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18
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Calligaris S, Valoppi F, Barba L, Pizzale L, Anese M, Conte L, Nicoli MC. Development of Transparent Curcumin Loaded Microemulsions by Phase Inversion Temperature (PIT) Method: Effect of Lipid Type and Physical State on Curcumin Stability. FOOD BIOPHYS 2016. [DOI: 10.1007/s11483-016-9461-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Alekseev O, Vaughn J, Taylor B, Barba L, Greiner J, Dickson C, Anderson C, Fullmer J, Vaskalis Z. Development of an ELISA to detect tumor-associated antigen tNASP in urine. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw363.90] [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: 11/12/2022] Open
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20
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Vohra V, Anzai T, Inaba S, Porzio W, Barba L. Transfer-printing of active layers to achieve high quality interfaces in sequentially deposited multilayer inverted polymer solar cells fabricated in air. Sci Technol Adv Mater 2016; 17:530-540. [PMID: 27877901 PMCID: PMC5118652 DOI: 10.1080/14686996.2016.1221306] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 07/19/2016] [Accepted: 08/03/2016] [Indexed: 06/06/2023]
Abstract
Polymer solar cells (PSCs) are greatly influenced by both the vertical concentration gradient in the active layer and the quality of the various interfaces. To achieve vertical concentration gradients in inverted PSCs, a sequential deposition approach is necessary. However, a direct approach to sequential deposition by spin-coating results in partial dissolution of the underlying layers which decreases the control over the process and results in not well-defined interfaces. Here, we demonstrate that by using a transfer-printing process based on polydimethylsiloxane (PDMS) stamps we can obtain increased control over the thickness of the various layers while at the same time increasing the quality of the interfaces and the overall concentration gradient within the active layer of PSCs prepared in air. To optimize the process and understand the influence of various interlayers, our approach is based on surface free energy, spreading parameters and work of adhesion calculations. The key parameter presented here is the insertion of high quality hole transporting and electron transporting layers, respectively above and underneath the active layer of the inverted structure PSC which not only facilitates the transfer process but also induces the adequate vertical concentration gradient in the device to facilitate charge extraction. The resulting non-encapsulated devices (active layer prepared in air) demonstrate over 40% increase in power conversion efficiency with respect to the reference spin-coated inverted PSCs.
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Affiliation(s)
- Varun Vohra
- Department of Engineering Science, University of Electro-Communications, Chofu, Japan
| | - Takuya Anzai
- Department of Engineering Science, University of Electro-Communications, Chofu, Japan
| | - Shusei Inaba
- Department of Engineering Science, University of Electro-Communications, Chofu, Japan
| | - William Porzio
- Istituto per lo Studio delle Macromolecole, CNR-ISMAC, Milano, Italy
| | - Luisa Barba
- Istituto di Cristallografia-Sincrotrone Elettra, Basovizza, Italy
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21
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Valoppi F, Calligaris S, Barba L, Šegatin N, Poklar Ulrih N, Nicoli MC. Influence of oil type on formation, structure, thermal, and physical properties of monoglyceride-based organogel. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201500549] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fabio Valoppi
- Istituto di Cristallografia; Consiglio Nazionale delle Ricerche; Trieste Italy
| | - Sonia Calligaris
- Dipartimento di Scienze Agroalimentari; Ambientali e Animali; Università di Udine; Udine Italy
| | - Luisa Barba
- Istituto di Cristallografia; Consiglio Nazionale delle Ricerche; Trieste Italy
| | - Nataša Šegatin
- Biotechnical Faculty; Department of Food Science and Technology; University of Ljubljana; Ljubljana Slovenia
| | - Nataša Poklar Ulrih
- Biotechnical Faculty; Department of Food Science and Technology; University of Ljubljana; Ljubljana Slovenia
| | - Maria Cristina Nicoli
- Dipartimento di Scienze Agroalimentari; Ambientali e Animali; Università di Udine; Udine Italy
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22
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Valoppi F, Calligaris S, Barba L, Nicoli MC. Structural and viscoelastic characterization of ternary mixtures of sunflower oil, saturated monoglycerides and aqueous phases containing different bases. Food Res Int 2015; 74:224-230. [PMID: 28411987 DOI: 10.1016/j.foodres.2015.05.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 02/06/2015] [Revised: 04/30/2015] [Accepted: 05/08/2015] [Indexed: 11/27/2022]
Abstract
The structure at different length scales and the viscoelastic properties of ternary mixtures composed of saturated monoglycerides, sunflower oil and aqueous solutions of weak bases (KHCO3, NaHCO3, and NH4HCO3) or strong bases (NaOH and KOH) were investigated. The characteristics of ternary mixtures were studied systematically by using polarized light microscopy, differential scanning calorimetry (DSC), synchrotron X-ray diffraction (XRD) and rheological analysis. Results showed that the base type and concentration greatly affected the structure of the mixtures. The use of strong bases allowed gelled systems to be obtained only at low concentrations (<10mM). On the contrary, the presence of weak bases induced gelling at all concentrations considered (from 1 to 1000mM). The increase of base concentration led to a reduction of the mean droplet diameter and melting temperature. At the same time, the viscoelastic characteristics as a function of base concentration followed a more complex behavior: G' and G″ progressively decreased as the salt concentration increased in a concentration range from 1 to 100mM, while the rheological parameters increased when salt concentration increased from 100 to 1000mM. The structural and viscoelastic behavior of systems prepared with different salts were commonly independent of the cation present in the medium. Results highlight that it is possible to tailor the structure of these gels by using specific bases.
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Affiliation(s)
- Fabio Valoppi
- Dipartimento di Scienze degli Alimenti, Università di Udine, Via Sondrio 2/A, 33100 Udine, Italy
| | - Sonia Calligaris
- Dipartimento di Scienze degli Alimenti, Università di Udine, Via Sondrio 2/A, 33100 Udine, Italy.
| | - Luisa Barba
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, 34100 Trieste, Italy
| | - Maria Cristina Nicoli
- Dipartimento di Scienze degli Alimenti, Università di Udine, Via Sondrio 2/A, 33100 Udine, Italy
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Affiliation(s)
- Silvia Destri
- Istituto per lo studio delle Macromolecole del CNR; Via E. Bassini 15 20133 Milan Italy
| | - Luisa Barba
- Istituto di Cristallografia-Sincrotrone Elettra; Strada Statale 14 Km 163.5 Area Science Park Basovizza Trieste Italy
| | - Ilario Gelmetti
- Dipartimento di Chimica e Chimica Industriale; Via Moruzzi 3 56124 Pisa Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Industriale; Via Moruzzi 3 56124 Pisa Italy
| | - William Porzio
- Istituto per lo studio delle Macromolecole del CNR; Via E. Bassini 15 20133 Milan Italy
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Leone G, Galeotti F, Porzio W, Scavia G, Barba L, Arrighetti G, Ricci G, Botta C, Giovanella U. Poly(styrene)/oligo(fluorene)-intercalated fluoromica hybrids: synthesis, characterization and self-assembly. Beilstein J Nanotechnol 2014; 5:2450-2458. [PMID: 25671140 PMCID: PMC4311581 DOI: 10.3762/bjnano.5.254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 11/18/2014] [Indexed: 06/04/2023]
Abstract
We report on the intercalation of a cationic fluorescent oligo(fluorene) in between the 2D interlayer region of a fluoromica type silicate. The formation of intercalated structures with different fluorophore contents is observed in powders by synchrotron radiation XRD. Successively, the hybrids are dispersed in poly(styrene) through in situ polymerization. Such a procedure allows us to synthesize the materials from solution, to achieve solid films, and to characterize them by optical and morphologic techniques. The polymeric films with homogeneous distribution of the hybrids exhibit ultraviolet-blue photoluminescence with a significantly enhanced photostability compared to the bare oligo(fluorene)s. Finally, under specific conditions, the polymer hybrid with higher oligo(fluorene) content spontaneously assembles into highly ordered microporous films.
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Affiliation(s)
- Giuseppe Leone
- CNR, Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy
| | - Francesco Galeotti
- CNR, Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy
| | - William Porzio
- CNR, Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy
| | - Guido Scavia
- CNR, Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy
| | - Luisa Barba
- CNR, Institute of Crystallography, UOS Trieste, Strada Statale 14, 34149 Basovizza, Trieste, Italy
| | - Gianmichele Arrighetti
- CNR, Institute of Crystallography, UOS Trieste, Strada Statale 14, 34149 Basovizza, Trieste, Italy
| | - Giovanni Ricci
- CNR, Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy
| | - Chiara Botta
- CNR, Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy
| | - Umberto Giovanella
- CNR, Istituto per lo Studio delle Macromolecole (ISMAC), via E. Bassini 15, 20133 Milano, Italy
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Calligaris S, Valoppi F, Barba L, Anese M, Nicoli MC. Mutual effect of fat and β-carotene on fat crystal network structure and carotenoid bleaching. Food Res Int 2014. [DOI: 10.1016/j.foodres.2014.09.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Valoppi F, Calligaris S, Barba L, Nicoli MC. Compositional Phase Diagram, Rheological and Structural Properties of Systems Containing UHT Skim Milk, Sunflower Oil, Saturated Monoglycerides and Co-Surfactants. FOOD BIOPHYS 2014. [DOI: 10.1007/s11483-014-9363-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yenamandra A, Wheeler F, Hollis A, Barba L, Wang Y, Geng L. Detection of Genomic Imbalances Involved in Common Chromosomal Rearrangements of Acute Leukemia by Cytogenomic SNP Microarray Analysis. Cancer Genet 2014. [DOI: 10.1016/j.cancergen.2014.06.018] [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: 10/24/2022]
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Mao L, Calligaris S, Barba L, Miao S. Monoglyceride self-assembled structure in O/W emulsion: formation, characterization and its effect on emulsion properties. Food Res Int 2014. [DOI: 10.1016/j.foodres.2014.01.042] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Barba L, Arrighetti G, Calligaris S. Crystallization and melting properties of extra virgin olive oil studied by synchrotron XRD and DSC. EUR J LIPID SCI TECH 2012. [DOI: 10.1002/ejlt.201200259] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Fumagalli E, Campione M, Raimondo L, Sassella A, Moret M, Barba L, Arrighetti G. Grazing-incidence X-ray diffraction study of rubrene epitaxial thin films. J Synchrotron Radiat 2012; 19:682-687. [PMID: 22898945 DOI: 10.1107/s0909049512027562] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 06/18/2012] [Indexed: 06/01/2023]
Abstract
The growth of organic semiconductors as thin films with good and controlled electrical performances is nowadays one of the main tasks in the field of organic semiconductor-based electronic devices. In particular it is often required to grow highly crystalline and precisely oriented thin films. Here, thanks to grazing-incidence X-ray diffraction measurements carried out at the ELETTRA synchrotron facility, it is shown that rubrene thin films deposited by organic molecular beam epitaxy on the surface of tetracene single crystals have the structure of the known orthorhombic polymorph, with the (2 0 0) plane parallel to the substrate surface. Moreover, the exact epitaxial relationship between the film and the substrate crystalline structures is determined, demonstrating the presence of a unique in-plane orientation of the overlayer.
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Affiliation(s)
- Enrico Fumagalli
- Department of Materials Science, University of Milano-Bicocca, via R. Cozzi 53, I-20125 Milano, Italy.
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Vohra V, Arrighetti G, Barba L, Higashimine K, Porzio W, Murata H. Enhanced Vertical Concentration Gradient in Rubbed P3HT:PCBM Graded Bilayer Solar Cells. J Phys Chem Lett 2012; 3:1820-1823. [PMID: 26291866 DOI: 10.1021/jz300710a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [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: 06/04/2023]
Abstract
Graded bilayer solar cells have proven to be at least as efficient as the bulk heterojunctions when it comes to the Poly(3-hexylthiophene) (P3HT) - [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) donor-acceptor system. However, control of the vertical concentration gradient using simple techniques has never been reported. We demonstrate that rubbing the P3HT layer prior to PCBM deposition induces major morphological changes in the active layer. Using the newly introduced energy-dispersive X-ray spectroscopy element mapping technique, we found that rubbing P3HT induces the formation of an ideal vertical donor-acceptor concentration gradient. Furthermore, the P3HT crystallites undergo a molecular reorientation from edge-on to face-on configuration inducing a better charge transport in the vertical direction. The combination of these two major morphological changes leads to the fabrication of high-performance solar cells that exhibit, to date, the record efficiencies for spin-coated graded bilayers solar cells.
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Affiliation(s)
- Varun Vohra
- †Japan Advanced Institute of Science and Technology (JAIST), School of Materials Science, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Gianmichele Arrighetti
- ‡Istituto di Cristallografia del CNR - c/o Sincrotrone Elettra, Strada Statale 14-Km 163,5 Area Science Park, 34012 Basovizza, Trieste, Italy
| | - Luisa Barba
- ‡Istituto di Cristallografia del CNR - c/o Sincrotrone Elettra, Strada Statale 14-Km 163,5 Area Science Park, 34012 Basovizza, Trieste, Italy
| | - Koichi Higashimine
- †Japan Advanced Institute of Science and Technology (JAIST), School of Materials Science, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - William Porzio
- §Istituto per lo Studio delle Macromolecole (ISMAC) Via Bassini, 15, Milano, 20133, Italy
| | - Hideyuki Murata
- †Japan Advanced Institute of Science and Technology (JAIST), School of Materials Science, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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Poccia N, Fratini M, Ricci A, Campi G, Barba L, Vittorini-Orgeas A, Bianconi G, Aeppli G, Bianconi A. Evolution and control of oxygen order in a cuprate superconductor. Nat Mater 2011; 10:733-736. [PMID: 21857676 DOI: 10.1038/nmat3088] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 07/01/2011] [Indexed: 05/31/2023]
Abstract
The disposition of defects in metal oxides is a key attribute exploited for applications from fuel cells and catalysts to superconducting devices and memristors. The most typical defects are mobile excess oxygens and oxygen vacancies, which can be manipulated by a variety of thermal protocols as well as optical and d.c. electric fields. Here we report the X-ray writing of high-quality superconducting regions, derived from defect ordering, in the superoxygenated layered cuprate, La₂CuO(4+y). Irradiation of a poor superconductor prepared by rapid thermal quenching results first in the growth of ordered regions, with an enhancement of superconductivity becoming visible only after a waiting time, as is characteristic of other systems such as ferroelectrics, where strain must be accommodated for order to become extended. However, in La₂CuO(4+y), we are able to resolve all aspects of the growth of (oxygen) intercalant order, including an extraordinary excursion from low to high and back to low anisotropy of the ordered regions. We can also clearly associate the onset of high-quality superconductivity with defect ordering in two dimensions. Additional experiments with small beams demonstrate a photoresist-free, single-step strategy for writing functional materials.
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Porzio W, Scavia G, Barba L, Arrighetti G, Milita S. Depth-resolved molecular structure and orientation of polymer thin films by synchrotron X-ray diffraction. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2010.12.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Scavia G, Porzio W, Destri S, Barba L, Arrighetti G. Micro-contact printing of poly(3-hexylthiophene) on silicon oxide: Effect of stamp stretching. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2010.05.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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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Moreau J, Giovanella U, Bombenger JP, Porzio W, Vohra V, Spadacini L, Di Silvestro G, Barba L, Arrighetti G, Destri S, Pasini M, Saba M, Quochi F, Mura A, Bongiovanni G, Fiorini M, Uslenghi M, Botta C. Highly Emissive Nanostructured Thin Films of Organic Host-Guests for Energy Conversion. Chemphyschem 2009; 10:647-53. [DOI: 10.1002/cphc.200800682] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
BACKGROUND Histologic findings of diabetic nephropathy (DN) are observed in allografts of patients with pretransplant (PreTx) diabetes mellitus (DM) and in patients who develop DM posttransplant (PostTx). Patients with allograft biopsies (Bx) were retrospectively studied to determine the incidence of recurrent and de novo DN and to ascertain what, if any, risk factors predispose to histologic DN in either patient population. METHODS From the renal transplant services at four hospitals from 1992 to 2000, the authors identified all patients with PreTxDM and PostTxDM (n=81). Those with renal biopsies performed >/=18 months PostTx were classified according to the presence or absence of histologic DN (Bx-positive, n=23; Bx-negative, n=35). Patients were then subdivided into four categories-recurrent DN (n=16), de novo DN (n=7), no recurrent DN (n=27), and no de novo DN (n=8)-for analyses. RESULTS Among these 58 patients, 74.1% had PreTx and 25.9% had PostTx diabetes. Of those with histologic DN, 69.6% were recurrent DN and 30.4% were de novo DN, making de novo DN at least as likely to develop as recurrent DN. After the onset of diabetes in the de novo population, the time to development of histologic DN was similar in the recurrent and the de novo patients (6.68+/-3.86 years vs. 5.90+/-3.13 years, P=0.66) and more rapid than previously reported. Apart from a more frequent family history of hypertension in patients with allograft DN compared with those without allograft DN, known risk factors for the development of native DN did not significantly differ among patients in the four cohorts. Proposed risk factors related to transplantation did not correlate with the development of recurrent or de novo DN. CONCLUSION Among patients with histologic DN, de novo DN occurred at least as frequently as recurrent DN, and the time to onset of histologically apparent DN was more rapid than previously reported. Neither the usual clinical predictors of DN nor clinical variables related to transplantation clearly distinguished the group with DN from the group without it, potentially implicating novel mechanisms in its pathogenesis.
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Affiliation(s)
- V Bhalla
- Division of Nephrology and Hypertension, Department of Internal Medicine, Harbor-UCLA Research and Education Institute, Torrance, CA, USA
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Farré M, Fernandez J, Paez M, Granada L, Barba L, Gutierrez HM, Pulgarin C, Barceló D. Analysis and toxicity of methomyl and ametryn after biodegradation. Anal Bioanal Chem 2002; 373:704-9. [PMID: 12194027 DOI: 10.1007/s00216-002-1413-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2001] [Revised: 06/13/2002] [Accepted: 06/14/2002] [Indexed: 10/27/2022]
Abstract
The controlled biodegradation of ametryn and methomyl has been performed, in accordance with the OECD Zahn-Wellens/EMPA procedure, by use of an enriched mixture of activated sludge collected from three domestic waste-water-treatment plants (WWTP). During the process concentrations of ametryn and methomyl in the water samples were isolated by solid-phase extraction (SPE); recovery rates were 98.9 and 93.2 for methomyl and ametryn, respectively. Liquid chromatography-mass spectrometry (LC-MS) was used to determine final pesticide concentrations and for metabolite identification. The efficiency of aerobic biodegradation of ametryn and methomyl was evaluated by measuring both the decrease in the concentration of the pesticides and global properties such as the chemical oxygen demand (COD). The acute toxicity of ametryn and methomyl was evaluated by use of the ToxAlert100 biological test, which is based on inhibition of the bioluminescence of Vibrio fischeri. There was significant correlation between results from primary and ultimate biodegradation and those from determination of toxicity. Pesticide concentrations were always reduced to below the limit of detection in less than 17 days. High COD removal (90-96%) was achieved in 28 and 18 days for methomyl and ametryn, respectively.
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Affiliation(s)
- M Farré
- IIQAB-CSIC, c/Jordi Girona 18-26, 08034 Barcelona, Spain
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Adler SG, Kang SW, Feld S, Cha DR, Barba L, Striker L, Striker G, Riser BL, LaPage J, Nast CC. Glomerular mRNAs in human type 1 diabetes: biochemical evidence for microalbuminuria as a manifestation of diabetic nephropathy. Kidney Int 2001; 60:2330-6. [PMID: 11737607 DOI: 10.1046/j.1523-1755.2001.00073.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND In patients with type 1 diabetes, some consider microalbuminuria to be a predictor of diabetic nephropathy while others believe it is an early feature of diabetic nephropathy. METHODS Levels of mRNAs that are of pathogenetic relevance in diabetic nephropathy were compared in glomeruli isolated from microalbuminuric and overtly proteinuric subjects and in control normoalbuminuric diabetic subjects and living renal transplant donors. RESULTS In subjects with microalbuminuria and overt proteinuria, glomerular mRNAs were virtually identical and approximately twofold higher for connective tissue growth factor (CTGF; P < 0.01) and collagen alpha2(IV) (P < 0.03) compared to living renal donors and normoalbuminuric patients. Glomerular glyceraldehyde-3-phosphate dehydrogenase (GAPDH) levels were not significantly different among the groups (P = 0.4). Weak but statistically significant correlations were noted between CTGF mRNA and albuminuria (assessed by rank), fractional mesangial surface area, and a composite renal biopsy index. Glomerular CTGF mRNA correlated inversely with creatinine clearance. Glomerular collagen alpha2(IV) mRNA levels correlated with albuminuria (by rank) and less strongly with fractional mesangial area. CONCLUSION To our knowledge, these data provide the first biochemical evidence demonstrating that the glomeruli of microalbuminuric patients and those with overt proteinuria do not differ significantly. The data support the concept that microalbuminuria is not "predictive" of diabetic nephropathy, but rather is an earlier point in the spectrum of diabetic nephropathy.
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Affiliation(s)
- S G Adler
- Division of Nephrology and Hypertension, Harbor-UCLA Research and Education Institute, Torrance, CA 90502, USA.
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Nourissat C, Barba L, Chambaud D, Gacon G. [Single-compartment knee arthroplasty prosthesis and idiopathic necrosis of the medial tibia surface]. Rev Chir Orthop Reparatrice Appar Mot 2001; 87:367-72. [PMID: 11431632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
PURPOSE OF THE STUDY Idiopathic necrosis of the medial articular surface of the tibia is exceptional. Diagnosis is quite difficult and often made late. Among the different treatments proposed, we preferred single-compartment arthroplasty. MATERIAL AND METHODS We report 8 cases in women with a mean age of 71.1 years. Diagnosis was suspected due to drug-resistant knee pain, particularly frequent at night, initially with radiographically normal knees. The first radiographic signs, seen 3 months after the onset of pain, were pathognomonic for osteonecrosis evidencing subchondral defects of the tibial surface with a dense peripheral rim and apparently "sequestered" in a notch. Bone scintigraphy evidenced intense uptake in the medial compartment. MRI confirmed the diagnosis evidencing a band of low intensity signals completely surrounding a sequestered zone reaching the cortical. This band was stable and irreversible. In 5 cases CT scan and in 3 cases tomography identified the width and height of the necrotic area that was limited to the medial compartment in all cases. All patients were treated with a single compartment implant. The diagnosis of necrosis was confirmed at pathology. RESULTS At 4,6 years of mean follow up all patients had an excellent outcome, "forgetting" their knee. No lucent lines developed along the femoral or tibial implants. DISCUSSION Necrosis of the medial articular surface of the tibia is exceptional and often diagnosed late by bone scintigraphy or MRI. Surgical treatment is usually based on tibial osteotomy for valgisation or a single or three-compartment prosthesis. In our 8 cases, the necrosis was limited to the medial compartment, warranting our therapeutic option.
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Affiliation(s)
- C Nourissat
- Clinique du Renaison, 75, rue du Général-Giraud, 42300 Roanne
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Adler SG, Feld S, Striker L, Striker G, LaPage J, Esposito C, Aboulhosn J, Barba L, Cha DR, Nast CC. Glomerular type IV collagen in patients with diabetic nephropathy with and without additional glomerular disease. Kidney Int 2000; 57:2084-92. [PMID: 10792628 DOI: 10.1046/j.1523-1755.2000.00058.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
BACKGROUND Type IV collagen is a constituent of mesangial matrix and is increased in amount in many forms of glomerular injury. METHODS We performed renal biopsies in patients who (1) were donating a kidney to a relative (LRD, N = 6), (2) had diabetic glomerulopathy with or without nephrosclerosis (DM, N = 6), or (3) had diabetic glomerulopathy with a superimposed glomerular lesion (DM+, N = 5). Glomerular collagen alpha2(IV) and control glyceraldehyde-3-phosphate dehydrogenase (GAPDH) mRNAs were measured, and the former correlated with clinical and morphological data to assess its usefulness in reflecting glomerular injury. RESULTS Collagen alpha2(IV) mRNA levels were lowest in LRD (2.9 +/- 0.6 attomol/glomerulus), higher in DM (5.9 +/- 1.6, P = 0.05), and highest in DM+ (12.7 +/- 2.8 attm/glomerulus, P < 0.05 vs. LRD and vs. DM). Control GAPDH mRNA levels were not significantly different (P > 0.05). Levels of proteinuria, serum creatinine, and glomerular size did not correlate with collagen alpha2(IV) mRNA levels. The fractional mesangial area and the fractional mesangial area occupied by type IV collagen were higher in both diabetic groups than in LRD (P < 10-6), but the intensity of type IV collagen staining in the diabetic patients was significantly less than that seen in the LRD (P < 0.01). In DM+ patients, extramesangial type IV collagen was present. Fractional mesangial area and glomerular collagen alpha2(IV) mRNA levels correlated (r = 0.45, P < 0.05). CONCLUSION These data are consistent with a view of diabetic nephropathy as a lesion of increased alpha2 type IV collagen transcription, increased total amount of collagen present, but decreased mesangial density relative to other matrix molecules. These data further demonstrate that glomerular injury superimposed on diabetic nephropathy contributes to additional structural damage by inducing increased synthesis of type IV collagen at extramesangial sites.
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Affiliation(s)
- S G Adler
- Harbor-UCLA Research and Education Institute, Torrance, CA 90509, USA.
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Gacon G, Philippe M, Barba L, Frayssinet P. [Osteolysis after total knee prosthesis]. Rev Chir Orthop Reparatrice Appar Mot 2000; 86:20-8. [PMID: 10669821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
PURPOSE OF THE STUDY The aim of our work was to study X-rays showing osteolysis after 5 years and more in 122 prosthesis and to try and assess such complication, often described in the United States but seldom in Europ. MATERIAL We are dealing here with 122 retaining posterior cruciate ligament, mostly cementless prothesis implanted between 1985 and 1992 84 chromium-cobalt prosthesis (PCA and Themis) implanted in 34 males and 88 females with an average age of 67 (45-81), 87,7 p. 100 had femoral cementless components and 70 p. 100 tibial cementless components. METHODS All patients were examined and had X-rays at an average of 6,9 years. Specially considered were X-rays showing a possible osteolysis. We looked for possible complication (external laxity, anterior femoral dislocation and polyethylene wear), assessment of the mechanical axis and for clinical results (Hungerford score) RESULTS Revisions: 19 arthroplasties were revised for PE wear tibial loosening metallosis or patella problems The postoperative score according to Hungerford was 84,5 p. 100 for PCA prosthese and 87 p.100 for the Themis. On the X-rays were only few osteolysis to be found: 9 cases (7,3 p. 100). For the PCA series: 3 femoral osteolysis, 1 tibial at 12 years, and one patellar osteolysis. For the Themis series: no femoral osteolysis, 3 tibial and one patellar osteolysis. Osteolysis are apparent on X-rays in profile for the femur and the patella, and in both profile and frontal X-rays for the tibia. Clinicaly 4 osteolysis really asymptomatic were not re-operated. 5 were revised: one 11 years later for femoral and tibial loosening, two for a patellar loosening, the other two patients had to be reoperated on for metallism (titanium's femoral component) and for those two instances osteolysis were discovered during the complication. DISCUSSION Osteolysis after TKA appears unusual in our experience without bearing on frequency finded by american authors with a lesser follow-up (Engh 11,1 p. 100 after 4,5y, Peters 16 p. 100 after 2,9 y, Robinson 9,18 p. 100 after 4,6 y). American litteratur analysis shows that the important number of osteolysis is due to: - either to dual-metal using (Co-Cr component with Titanium screws for exemple), - or bad quality of polyethylene (compressed), - or a bad design of former prosthesis. CONCLUSION Interface illness, linked to the production of wear debris, osteolysis after total knee arthroplasty is rarer than after a hip one, probably because size of debris is different, larger in knee than in hip. It is likely that the improvement of PE quality, design of prosthesis, as well as a better knowledge of osteolysis mechanism will allow to delay this complication wich is in a long term ineluctable.
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Affiliation(s)
- G Gacon
- Clinique du Parc Lyon, 86 Boulevard des Belges, 69006 Lyon, France
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Pettinari C, Accorroni F, Cingolani A, Marchetti F, Cassetta A, Barba L. (1-Phenyl-3-methyl-4-acetylpyrazolon-5-ato)rhodium(I) complexes, synthesis, structural and spectroscopical characterization: Reactivity of diolefin- and dicarbonyl-rhodium complexes toward N-, P- and O-donors. J Organomet Chem 1998. [DOI: 10.1016/s0022-328x(98)00692-5] [Citation(s) in RCA: 13] [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: 10/18/2022]
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Gliubich F, Berni R, Colapietro M, Barba L, Zanotti G. Structure of sulfur-substituted rhodanese at 1.36 A resolution. Acta Crystallogr D Biol Crystallogr 1998; 54:481-6. [PMID: 9761843 DOI: 10.1107/s090744499701216x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
1.36 A resolution X-ray diffraction data have been recorded at 100 K for bovine liver sulfur-substituted rhodanese, using synchrotron radiation. The crystal structure has been refined anisotropically to a final R factor of 0.159 (Rfree = 0.229) for 53034 unique reflections. The model contains 2327 protein atoms and 407 solvent molecules, with a good geometry. The high resolution allows full details for helices, beta-sheets, tight turns and of all inter- and intramolecular interactions stabilizing the enzyme molecule to be given. The situation at the active site is described, particularly in regard to the network of hydrogen bonds made by Sgamma and Sdelta of the sulfur-substituted catalytic Cys247 and surrounding groups and solvent molecules. The replacement of the precipitant ammonium sulfate with cryoprotectants in the crystal-suspending medium led to the removal of the sulfate ion from the enzyme active site. Only limited changes of the enzyme structure have been found as a result of the drastic change in the crystal medium.
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Affiliation(s)
- F Gliubich
- Department of Organic Chemistry, University of Padova and Biopolymer Research Center, CNR, 35131, Padova, Italy
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Affiliation(s)
- D A Shoskes
- Harbor-UCLA Medical Center, Department of Surgery, Torrance 90502, USA
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Shoskes DA, Avelino L, Barba L, Sender M. Patient death or renal graft loss within 3 yr of transplantation in a county hospital: importance of poor initial graft function. Clin Transplant 1997; 11:618-22. [PMID: 9408696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Our purpose was to study the factors predictive of graft loss or patient death within 3 yr of renal transplant in a county population. 363 renal transplants performed between 1984 and 1991 at the Harbor-UCLA Medical Center were reviewed. There were 16 recipients (4%) who died and 76 (21%) who lost their grafts within 3 yr. Known causes of death were cardiac (44%), infection (38%) and malignancy (6%). There was a higher proportion of diabetics (44%), hypertensives (69%) and those with a past cardiac history (38%). There was also a high delayed graft function rate (56%). Of the 76 grafts that failed in the first 3 yr, 14% were due to noncompliance, 20% to grafts that never functioned, 9% to technical problems, 21% to acute rejection, 9% to recurrent disease and 26% to chronic rejection. The noncompliance group were younger (mean 34 yr), and more likely to be a first transplant (90%) and be non-white (82%). The rejection group was significant for high delayed graft function rate (84%) and frequent and early rejection (76% at least one rejection). We conclude that fair organ allocation requires a balance between equity and utility, but patient death or graft loss within 3 yr benefits neither the patient or society. Patient survival may be improved with diligent cardiac evaluation, particularly in older patients and diabetics. Patient education and monitoring for noncompliance is essential, particularly in young first-time recipients. Maneuvers to decrease delayed graft function are essential to improve long-term results.
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Affiliation(s)
- D A Shoskes
- Department of Surgery, Harbor-UCLA Medical Center, Torrance 90509, USA.
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Bretan PN, Koyle M, Singh K, Barba L, Ward H, Sender M, Avelino L, Rajfer J. Improved survival of en bloc renal allografts from pediatric donors. J Urol 1997; 157:1592-5. [PMID: 9112483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
PURPOSE We developed a technical and immunological protocol to increase survival of renal transplants from pediatric donors. MATERIALS AND METHODS En bloc kidneys (22) were procured from donors weighing 2 to 14 kg. (1 to 60 months old) and transplanted into adult recipients. In group 1 (12 patients) sequential therapy was used for kidneys with more than 35 hours of cold storage and immediate triple therapy (cyclosporine, azathioprine and prednisone) was used for those with less than 35 hours of cold storage. In group 2 (10 patients) OKT3 induction therapy was used. Mean followup was 4.7 years. RESULTS Mean blood pressure at 1 and 4 years was not significantly different between the groups. Mean serum creatinine was not significantly different between the groups at 1 year but it was significantly less in group 2 at 4 years (1.9 +/- 1.0 versus 1.2 +/- 0.24 mg./dl., p <0.05). At 1 year of followup the complication rate was 75% in 9 of 12 patients in group 1, including 4 infections or leaks (2 lost), 6 rejections (3 lost) and 3 cases of thrombosis or hemorrhage, and 20% (p <0.01) in group 2 (1 patient had the hemolytic uremic syndrome leading to graft loss). Graft survival was significantly greater in group 2 at all 4 years of followup (p = 0.05). CONCLUSIONS The success of pediatric en bloc renal transplantation can be enhanced by induction therapy in healthy recipients.
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Affiliation(s)
- P N Bretan
- Department of Surgery, University of California School of Medicine, Renal Transplant Service of Harbor/UCLA, Torrance, USA
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Spagna R, Barba L, Camalli M, Cassetta A, Catricala' M, Marciante C, Pifferi A, Colapietro M, Portalone G. The four-circle diffractometer at ELETTRA. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396098364] [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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