1
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Andrusenko I, Mugnaioli E, Gemmi M, Schmidt W. True molecular conformation and structure determination of remarkable polycyclic aromatic hydrocarbons. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322094621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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2
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Gemmi M, Andrusenko I, Marchetti D, Latini A, Arciniegas M. 3D ED of hybrid perovskites. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322092968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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3
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Faye M, Sala A, Marchetti D, Agbemeh V, Gemmi M. Structure determination of a mechanochemically synthesised metal–organic framework using 3D electron diffraction. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322090635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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4
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Marchetti D, Portone F, Mezzadri F, Dalcanale E, Gemmi M, Pedrini A, Massera C. Dynamic behaviour of a tetrapyridine-based crystalline supramolecular organic framework. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322095055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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5
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Cabaj M, Palatinus L, Andrusenko I, Gemmi M. The influence of energy filtering on kinematical and dynamical structure refinement from 3D ED data. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322091525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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6
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Agbemeh V, Sonaglioni D, Andrusenko I, Husanu E, Gemmi M. Structural study of organic cocrystals using 3D electron diffraction. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322091380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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7
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Abstract
Coesite in impact rocks is traditionally considered a retrograde product formed during pressure release by the crystallisation of an amorphous phase (either silica melt or diaplectic glass). Recently, the detailed microscopic and crystallographic study of impact ejecta from Kamil crater and the Australasian tektite strewn field pointed in turn to a different coesite formation pathway, through subsolidus quartz-to-coesite transformation. We report here further evidence documenting the formation of coesite directly from quartz. In Kamil ejecta we found sub-micrometric single-coesite-crystals that represent the first crystallization seeds of coesite. Coesite in Australasian samples show instead well-developed subeuhedral crystals, growing at the expenses of hosting quartz and postdating PDF deformation. Coesite (010) plane is most often parallel to quartz {10-11} plane family, supporting the formation of coesite through a topotactic transformation. Such reaction is facilitated by the presence of pre-existing and shock-induced discontinuities in the target. Shock wave reverberations can provide pressure and time conditions for coesite nucleation and growth. Because discontinuities occur in both porous and non-porous rocks and the coesite formation mechanism appears similar for small and large impacts, we infer that the proposed subsolidus transformation model is valid for all types of quartz-bearing target rocks.
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Affiliation(s)
- F Campanale
- Dipartimento di Scienze della Terra, Università d Pisa, Via S. Maria 53, 56126, Pisa, Italy.
- Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia (IIT), Piazza San Silvestro 12, 56127, Pisa, Italy.
| | - E Mugnaioli
- Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia (IIT), Piazza San Silvestro 12, 56127, Pisa, Italy
| | - M Gemmi
- Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia (IIT), Piazza San Silvestro 12, 56127, Pisa, Italy
| | - L Folco
- Dipartimento di Scienze della Terra, Università d Pisa, Via S. Maria 53, 56126, Pisa, Italy
- CISUP, Centro per l'Integrazione della Strumentazione dell'Università di Pisa, Lungarno Pacinotti 43, 56126, Pisa, Italy
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Chiappe C, Rodriguez-Douton MJ, Mozzati MC, Prete D, Griesi A, Guazzelli L, Gemmi M, Caporali S, Calisi N, Pomelli CS, Rossella F. Publisher Correction: Fe-functionalized paramagnetic sporopollenin from pollen grains: one-pot synthesis using ionic liquids. Sci Rep 2020; 10:20953. [PMID: 33239661 PMCID: PMC7688958 DOI: 10.1038/s41598-020-77728-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- C Chiappe
- Dipartimento Di Farmacia, Università Di Pisa, Via Bonanno 33, 56126, Pisa, Italy
| | - M J Rodriguez-Douton
- Dipartimento Di Farmacia, Università Di Pisa, Via Bonanno 33, 56126, Pisa, Italy
| | - M C Mozzati
- Dipartimento Di Fisica, Università Di Pavia, Via Bassi 6, 27100, Pavia, Italy
| | - D Prete
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56126, Pisa, Italy
| | - A Griesi
- Center for Nanotechnology Innovation@NEST, Istituto Italiano Di Tecnologia, Piazza San Silvestro, 12, 56127, Pisa, Italy.,Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
| | - L Guazzelli
- Dipartimento Di Farmacia, Università Di Pisa, Via Bonanno 33, 56126, Pisa, Italy
| | - M Gemmi
- Center for Nanotechnology Innovation@NEST, Istituto Italiano Di Tecnologia, Piazza San Silvestro, 12, 56127, Pisa, Italy
| | - S Caporali
- Dipartimento Di Ingegneria Industriale, Università Di Firenze, Via di S. Marta 3, 50129, Firenze, Italy.,INSTM, Via Giusti 9, 50123, Firenze, Italy
| | - N Calisi
- Dipartimento Di Ingegneria Industriale, Università Di Firenze, Via di S. Marta 3, 50129, Firenze, Italy.,INSTM, Via Giusti 9, 50123, Firenze, Italy
| | - C S Pomelli
- Dipartimento Di Farmacia, Università Di Pisa, Via Bonanno 33, 56126, Pisa, Italy.
| | - F Rossella
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56126, Pisa, Italy
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9
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Chiappe C, Rodriguez-Douton MJ, Mozzati MC, Prete D, Griesi A, Guazzelli L, Gemmi M, Caporali S, Calisi N, Pomelli CS, Rossella F. Fe-functionalized paramagnetic sporopollenin from pollen grains: one-pot synthesis using ionic liquids. Sci Rep 2020; 10:12005. [PMID: 32686728 PMCID: PMC7371869 DOI: 10.1038/s41598-020-68875-6] [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: 07/18/2019] [Accepted: 04/15/2020] [Indexed: 11/15/2022] Open
Abstract
The preparation of Fe-decorated sporopollenins was achieved using pollen grains and an ionic liquid as solvent and functionalizing agent. The integrity of the organic capsules was ascertained through scanning electron microscopy studies. The presence of Fe in the capsule was investigated using FT-IR, X-ray photoemission spectroscopy and energy-dispersive X-ray spectroscopy. Electron paramagnetic resonance and magnetization measurements allowed us to demonstrate the paramagnetic behavior of our Fe-functionalized sporopollenin. A few potential applications of pollen-based systems functionalized with magnetic metal ions via ionic liquids are discussed.
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Affiliation(s)
- C Chiappe
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126, Pisa, Italy
| | - M J Rodriguez-Douton
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126, Pisa, Italy
| | - M C Mozzati
- Dipartimento di Fisica, Università di Pavia, Via Bassi 6, 27100, Pavia, Italy
| | - D Prete
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56126, Pisa, Italy
| | - A Griesi
- Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro, 12, 56127, Pisa, Italy
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
| | - L Guazzelli
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126, Pisa, Italy
| | - M Gemmi
- Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro, 12, 56127, Pisa, Italy
| | - S Caporali
- Dipartimento di Ingegneria Industriale, Università di Firenze, Via di S. Marta 3, 50129, Firenze, Italy
- INSTM, Via Giusti 9, 50123, Firenze, Italy
| | - N Calisi
- Dipartimento di Ingegneria Industriale, Università di Firenze, Via di S. Marta 3, 50129, Firenze, Italy
- INSTM, Via Giusti 9, 50123, Firenze, Italy
| | - C S Pomelli
- Dipartimento di Farmacia, Università di Pisa, Via Bonanno 33, 56126, Pisa, Italy.
| | - F Rossella
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56126, Pisa, Italy
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10
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Parlanti P, Cappello V, Brun F, Tromba G, Rigolio R, Tonazzini I, Cecchini M, Piazza V, Gemmi M. Size and specimen-dependent strategy for x-ray micro-ct and tem correlative analysis of nervous system samples. Sci Rep 2017; 7:2858. [PMID: 28588216 PMCID: PMC5460131 DOI: 10.1038/s41598-017-02998-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 03/30/2017] [Indexed: 11/08/2022] Open
Abstract
Correlative approaches are a powerful tool in the investigation of biological samples, but require specific preparation procedures to maintain the strength of the employed methods. Here we report the optimization of the embedding protocol of nervous system samples for a correlative synchrotron X-ray computed microtomography (micro-CT) and transmission electron microscopy (TEM) approach. We demonstrate that it is possible to locate, with the micrometric resolution of micro-CT, specific volumes of interest for a further ultrastructural characterization to be performed with TEM. This approach can be applied to samples of different size and morphology up to several cm. Our optimized method represents an invaluable tool for investigating those pathologies in which microscopic alterations are localized in few confined regions, rather than diffused in entire tissues, organs or systems. We present a proof of concept of our method in a mouse model of Globoid Cells Leukodistrophy.
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Affiliation(s)
- P Parlanti
- NEST, Scuola Normale Superiore, Piazza San Silvestro 12, I-56127, Pisa, Italy
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - V Cappello
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, I-56127, Pisa, Italy.
| | - F Brun
- National Research Council - Institute of Nanotechnology (CNR Nanotech) c/o Dipartimento di Fisica, Università Sapienza, Piazzale Aldo Moro 5, I-00185, Rome, Italy
- Dipartimento di Ingegneria e Architettura, Università degli Studi di Trieste, Via A. Valerio 10, I-34127, Trieste, Italy
- Elettra - Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5 in Area Science Park, I-34149, Basovizza, Trieste, Italy
| | - G Tromba
- Elettra - Sincrotrone Trieste S.C.p.A., S.S. 14 km 163.5 in Area Science Park, I-34149, Basovizza, Trieste, Italy
| | - R Rigolio
- Dipartimento di Medicina e Chirurgia, Experimental Neurology Unit, Università degli Studi di Milano-Bicocca, Via Cadore 48, I-20900, Monza, Italy
| | - I Tonazzini
- NEST, Scuola Normale Superiore and Istituto di Nanoscienze - CNR, Piazza San Silvestro 12, I-56127, Pisa, Italy
- Fondazione Umberto Veronesi, Piazza Velasca, I-20122, Milano, Italy
| | - M Cecchini
- NEST, Scuola Normale Superiore and Istituto di Nanoscienze - CNR, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - V Piazza
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - M Gemmi
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, I-56127, Pisa, Italy
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11
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David J, Rossella F, Rocci M, Ercolani D, Sorba L, Beltram F, Gemmi M, Roddaro S. Crystal Phases in Hybrid Metal-Semiconductor Nanowire Devices. Nano Lett 2017; 17:2336-2341. [PMID: 28231001 DOI: 10.1021/acs.nanolett.6b05223] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We investigate the metallic phases observed in hybrid metal-GaAs nanowire devices obtained by controlled thermal annealing of Ni/Au electrodes. Devices are fabricated onto a SiN membrane compatible with transmission electron microscopy studies. Energy dispersive X-ray spectroscopy allows us to show that the nanowire body includes two Ni-rich phases that thanks to an innovative use of electron diffraction tomography can be unambiguously identified as Ni3GaAs and Ni5As2 crystals. The mechanisms of Ni incorporation leading to the observed phenomenology are discussed.
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Affiliation(s)
- J David
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia , Piazza San Silvestro 12, 56127 Pisa, Italy
| | - F Rossella
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - M Rocci
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - D Ercolani
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - L Sorba
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - F Beltram
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12, I-56127 Pisa, Italy
| | - M Gemmi
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia , Piazza San Silvestro 12, 56127 Pisa, Italy
| | - S Roddaro
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12, I-56127 Pisa, Italy
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12
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Gorrini F, Cazzanelli M, Bazzanella N, Edla R, Gemmi M, Cappello V, David J, Dorigoni C, Bifone A, Miotello A. On the thermodynamic path enabling a room-temperature, laser-assisted graphite to nanodiamond transformation. Sci Rep 2016; 6:35244. [PMID: 27731385 PMCID: PMC5059669 DOI: 10.1038/srep35244] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 09/27/2016] [Indexed: 11/08/2022] Open
Abstract
Nanodiamonds are the subject of active research for their potential applications in nano-magnetometry, quantum optics, bioimaging and water cleaning processes. Here, we present a novel thermodynamic model that describes a graphite-liquid-diamond route for the synthesis of nanodiamonds. Its robustness is proved via the production of nanodiamonds powders at room-temperature and standard atmospheric pressure by pulsed laser ablation of pyrolytic graphite in water. The aqueous environment provides a confinement mechanism that promotes diamond nucleation and growth, and a biologically compatible medium for suspension of nanodiamonds. Moreover, we introduce a facile physico-chemical method that does not require harsh chemical or temperature conditions to remove the graphitic byproducts of the laser ablation process. A full characterization of the nanodiamonds by electron and Raman spectroscopies is reported. Our model is also corroborated by comparison with experimental data from the literature.
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Affiliation(s)
- F. Gorrini
- Laboratorio IdEA, Dipartimento di Fisica, Università degli Studi di Trento, via Sommarive 14, I-38123 Povo (TN) Italy
- Istituto Italiano di Tecnologia, Center for Neuroscience and Cognitive Systems, corso Bettini 31 Rovereto (TN) Italy
| | - M. Cazzanelli
- Laboratorio IdEA, Dipartimento di Fisica, Università degli Studi di Trento, via Sommarive 14, I-38123 Povo (TN) Italy
| | - N. Bazzanella
- Laboratorio IdEA, Dipartimento di Fisica, Università degli Studi di Trento, via Sommarive 14, I-38123 Povo (TN) Italy
| | - R. Edla
- Laboratorio IdEA, Dipartimento di Fisica, Università degli Studi di Trento, via Sommarive 14, I-38123 Povo (TN) Italy
| | - M. Gemmi
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation, piazza San Silvestro, 12 Pisa, Italy
| | - V. Cappello
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation, piazza San Silvestro, 12 Pisa, Italy
| | - J. David
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation, piazza San Silvestro, 12 Pisa, Italy
| | - C. Dorigoni
- Istituto Italiano di Tecnologia, Center for Neuroscience and Cognitive Systems, corso Bettini 31 Rovereto (TN) Italy
| | - A. Bifone
- Istituto Italiano di Tecnologia, Center for Neuroscience and Cognitive Systems, corso Bettini 31 Rovereto (TN) Italy
| | - A. Miotello
- Laboratorio IdEA, Dipartimento di Fisica, Università degli Studi di Trento, via Sommarive 14, I-38123 Povo (TN) Italy
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13
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Gomes UP, Ercolani D, Zannier V, David J, Gemmi M, Beltram F, Sorba L. Nucleation and growth mechanism of self-catalyzed InAs nanowires on silicon. Nanotechnology 2016; 27:255601. [PMID: 27171601 DOI: 10.1088/0957-4484/27/25/255601] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report on the nucleation and growth mechanism of self-catalyzed InAs nanowires (NWs) grown on Si (111) substrates by chemical beam epitaxy. Careful choices of the growth parameters lead to In-rich conditions such that the InAs NWs nucleate from an In droplet and grow by the vapor-liquid-solid mechanism while sustaining an In droplet at the tip. As the growth progresses, new NWs continue to nucleate on the Si (111) surface causing a spread in the NW size distribution. The observed behavior in NW nucleation and growth is described within a suitable existing theoretical model allowing us to extract relevant growth parameters. We argue that these results provide useful guidelines to rationally control the growth of self-catalyzed InAs NWs for various applications.
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Affiliation(s)
- U P Gomes
- NEST Scuola Normale Superiore and Istituto di Nanoscienze-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
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14
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Gomes UP, Ercolani D, Sibirev NV, Gemmi M, Dubrovskii VG, Beltram F, Sorba L. Catalyst-free growth of InAs nanowires on Si (111) by CBE. Nanotechnology 2015; 26:415604. [PMID: 26404459 DOI: 10.1088/0957-4484/26/41/415604] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We investigate a growth mechanism which allows for the fabrication of catalyst-free InAs nanowires on Si (111) substrates by chemical beam epitaxy. Our growth protocol consists of successive low-temperature (LT) nucleation and high-temperature growth steps. This method produces non-tapered InAs nanowires with controllable length and diameter. We show that InAs nanowires evolve from the islands formed during the LT nucleation step and grow truly catalyst-free, without any indium droplets at the tip. The impact of different growth parameters on the nanowire morphology is presented. In particular, good control over nanowire aspect ratio is demonstrated. A better understanding of the growth process is obtained through the development of a theoretical model combining the diffusion-induced growth scenario with some specific features of the catalyst-free growth mechanism, along with the analysis of the V/III flow ratio influencing material incorporation. As a result, we perform a full mapping of the nanowire morphology versus growth parameters which provides useful general guidelines on the self-induced formation of III-V nanowires on silicon.
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Affiliation(s)
- U P Gomes
- NEST Scuola Normale Superiore and Istituto di Nanoscienze-CNR, Piazza S. Silvestro 12, I-56127 Pisa, Italy
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15
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Boni A, Bardi G, Bertero A, Cappello V, Emdin M, Flori A, Gemmi M, Innocenti C, Menichetti L, Sangregorio C, Villa S, Piazza V. Design and optimization of lipid-modified poly(amidoamine) dendrimer coated iron oxide nanoparticles as probes for biomedical applications. Nanoscale 2015; 7:7307-7317. [PMID: 25815711 DOI: 10.1039/c5nr01148e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Superparamagnetic iron oxide nanoparticles with a wide size range (2.6-14.1 nm) were synthesized and coated with the amphiphilic poly(amidoamine) PAMAM-C12 dendrimer. The resulting well dispersed and stable water suspensions were fully characterized in order to explore their possible use in biomedical applications. The structural and magnetic properties of the nanoparticles were preserved during the coating and were related to their relaxometric behaviour. The Nuclear Magnetic Resonance Dispersion (NMRD) profiles were found to be in accordance with the Roch model. The biocompatibility was assessed by means of cell viability tests and Transmission Electron Microscopy (TEM) analysis. The nanoparticles' capability of being detected via Magnetic Resonance Imaging (MRI) was investigated by means of clinical MRI scanners both in water and agar gel phantoms, and in a mouse model.
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Affiliation(s)
- A Boni
- Istituto Italiano di Tecnologia, Center for Nanotechnology Innovation @NEST, Piazza San Silvestro 12, 56127 Pisa, Italy.
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16
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Del Turco S, Ciofani G, Cappello V, Navarra T, Caselli C, Gemmi M, Mattoli V, Basta G. Anti-inflammatory and antioxidant effects of cerium oxide nanoparticles in human endothelial cells. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p4174] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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17
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Klein H, Bacia M, Rageau A, Strobel P, Gemmi M, Pankov V, Makhnach L. Complex Sr 64.1Bi 27.7Ni 8.2O xrevisited and refined. Acta Crystallogr A 2013. [DOI: 10.1107/s0108767313099030] [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: 11/11/2022] Open
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18
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Galanis AS, Gemmi M, Karavassili F, Lappas A, Margiolaki I, Nikolopoulos S. Study of Na 0.44MnO 2by manual diffraction tomography using beam precession TEM method. Acta Crystallogr A 2012. [DOI: 10.1107/s010876731209527x] [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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19
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Gemmi M. The interplay between X-ray powder and electron diffraction: the case of experimental petrology. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312097966] [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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20
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Klein H, Bacia M, Rageau A, Strobel P, Gemmi M. Huge unit cell Sr 64.1Bi 27.7Ni 8.2O xsolved by precession electron diffraction. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311082420] [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: 11/11/2022] Open
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21
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Garavelli L, Rosato S, Mele A, Wischmeijer A, Rivieri F, Gelmini C, Sandonà F, Sassatelli R, Carlinfante G, Giovanardi F, Gemmi M, Della Giustina E, Amarri S, Banchini G, Bedogni G. Massive hemobilia and papillomatosis of the gallbladder in metachromatic leukodystrophy: a life-threatening condition. Neuropediatrics 2009; 40:284-6. [PMID: 20446223 DOI: 10.1055/s-0030-1248246] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Polyposis of the gallbladder is rare during childhood. This condition can be associated with three other conditions: metachromatic leukodystrophy, Peutz-Jeghers' syndrome, and pancreaticobiliary maljunction. We report the case of a child with hemobilia in metachromatic leukodystrophy, which rendered cholecystectomy necessary. Macroscopically, the gallbladder measured 4.6 cm in length and showed an opaque serous surface and focal brown petechiae. Moreover, a yellow polypoid lesion of 2 cm in diameter and a diffuse thickening of the fundus wall were observed. Many reports describe the importance of the association of gallbladder papillomatosis with metachromatic leukodystrophy, but only three cases presented with massive intestinal bleeding, such as our young patient had. It is thus imperative that this life-threatening condition should be well known.
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Affiliation(s)
- L Garavelli
- Clinical Genetic Unit, S. Maria Nuova Hospital, Reggio Emilia, Italy.
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Summonte C, Rizzoli R, Desalvo A, Zignani F, Centurioni E, Pinghini R, Bruno G, Losurdo M, Capezzuto P, Gemmi M. Plasma-enhanced chemical vapour deposition of microcrystalline silicon: On the dynamics of the amorphous-microcrystalline interface by optical methods. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642810008209754] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - R. Rizzoli
- a Consiglio Nazionale delie Ricerche, Istituto LAMEL , I-40129 , Bologna , Italy
| | - A. Desalvo
- b Dipartimento di Chimica Applicata e Scienza dei Materiali , Bologna University , I-40136 , Bologna , Italy
| | - F. Zignani
- b Dipartimento di Chimica Applicata e Scienza dei Materiali , Bologna University , I-40136 , Bologna , Italy
| | - E. Centurioni
- a Consiglio Nazionale delie Ricerche, Istituto LAMEL , I-40129 , Bologna , Italy
- b Dipartimento di Chimica Applicata e Scienza dei Materiali , Bologna University , I-40136 , Bologna , Italy
| | - R. Pinghini
- a Consiglio Nazionale delie Ricerche, Istituto LAMEL , I-40129 , Bologna , Italy
- b Dipartimento di Chimica Applicata e Scienza dei Materiali , Bologna University , I-40136 , Bologna , Italy
| | - G. Bruno
- c Centro di Studio per la Chimica dei Plasmi, Consiglio Nazionale delie Ricerche , I-70126 , Bari , Italy
| | - M. Losurdo
- c Centro di Studio per la Chimica dei Plasmi, Consiglio Nazionale delie Ricerche , I-70126 , Bari , Italy
| | - P. Capezzuto
- c Centro di Studio per la Chimica dei Plasmi, Consiglio Nazionale delie Ricerche , I-70126 , Bari , Italy
| | - M. Gemmi
- a Consiglio Nazionale delie Ricerche, Istituto LAMEL , I-40129 , Bologna , Italy
- d Istituto Nazionale per la Fisica delia Materia, Dipartimento di Fisica, Bologna University , I-40127 , Bologna , Italy
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Nicolopoulos S, Morniroli JP, Gemmi M. From powder diffraction to structure resolution of nanocrystals by precession electron diffraction. ACTA ACUST UNITED AC 2007. [DOI: 10.1524/zksu.2007.2007.suppl_26.183] [Citation(s) in RCA: 5] [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: 11/24/2022]
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Ghisletti D, Cornaro U, Contardi C, Sanfilippo D, Gemmi M, Merlini M, Artioli G. Simultaneous XRPD-MS study on iron oxides supported on spinel-like aluminate. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305094067] [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: 11/11/2022] Open
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Righi L, Calestani G, Gemmi M, Migliori A, Bettinelli M. Neutron diffraction study of phi-Bi(8)Pb(5)O(17): structure refinement and analysis of cationic ordering. Acta Crystallogr B 2001; 57:237-43. [PMID: 11373380 DOI: 10.1107/s0108768101001628] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2000] [Accepted: 01/23/2001] [Indexed: 11/10/2022]
Abstract
The triclinic crystal structure of the varphi phase in the structure of the Bi(2)O(3)-PbO phase diagram has been recently solved by the synergetic use of electron and X-ray diffraction on a polycrystalline Bi(8)Pb(5)O(17) sample. In the present work the problem is re-examined on the basis of powder neutron diffraction data: the structure has been confirmed and refined by the Rietveld method. The increased accuracy of the O-atom positions allowed the study of the cationic ordering in this structure by means of bond-valence calculations and charge distribution analysis. The results, confirmed by the refinement of the site occupancies, indicate that the structure is ordered to a large extent, with Bi and Pb atoms occupying preferentially different lattice sites. In this frame, the varphi phase being the most ordered one in the considered region of the Bi(2)O(3)-PbO phase diagram, it should represent the thermodynamically stable low-temperature polymorph.
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Affiliation(s)
- L Righi
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica and CNR-CSSD, Università di Parma, Viale delle Scienze, 43100 Parma, Italy.
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Biasini M, Kontrym-Sznajd G, Monge MA, Gemmi M, Czopnik A, Jura A. Fermi surface and magnetic structure of TmGa3. Phys Rev Lett 2001; 86:4616-4619. [PMID: 11384297 DOI: 10.1103/physrevlett.86.4616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2000] [Indexed: 05/23/2023]
Abstract
We carry out measurements of the two-dimensional angular correlation of the positron annihilation radiation (2D-ACAR) to reconstruct the complex multisheet Fermi surface (FS) of the cubic rare-earth (RE) compound TmGa3. We discover a correlation between the antiferromagnetic structures and the nesting of the FS along the [110] directions. Moreover, we propose methods to estimate the density of states at the Fermi energy ( EF) and the electronic contribution to the specific heat [we obtain N(EF) = 13.6 states/Ryd cell and gamma = 2.4 mJ/mole K2].
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Affiliation(s)
- M Biasini
- ENEA, Via Don Fiammelli 2, 40129 Bologna, Italy
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Abstract
A new software package for quantitative electron diffraction data treatment of unknown structures is described. No "a priori" information is required by the package which is able to perform in successive steps the 2-D indexing of digitised diffraction patterns, the extraction of the intensity of the collected reflections and the 3-D indexing of all recorded patterns, giving as results the lattice parameters of the investigated structure and a series of data files (one for each diffraction pattern) containing the measured intensities and the relative e.s.d.s of the 3-D indexed reflections. The software package is mainly conceived for the treatment of diffraction patterns taken with a Gatan CCD Slow-Scan Camera, but it can also deal with generic digitised plates. The program is designed to extract intensity data suitable for structure solution techniques in electron crystallography. The integration routine is optimised for a correct background evaluation, a necessary condition to deal with weak spots of irregular shape and an intensity just above the background.
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Affiliation(s)
- D Belletti
- Dipartimento di Chimica Generale ed Inorganica, Università di Parma, Italy
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