1
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Wright MA, Surta TW, Evans JA, Lim J, Jo H, Hawkins CJ, Bahri M, Daniels LM, Chen R, Zanella M, Chagas LG, Cookson J, Collier P, Cibin G, Chadwick AV, Dyer MS, Browning ND, Claridge JB, Hardwick LJ, Rosseinsky MJ. Accessing Mg-Ion Storage in V 2PS 10 via Combined Cationic-Anionic Redox with Selective Bond Cleavage. Angew Chem Int Ed Engl 2024; 63:e202400837. [PMID: 38446007 DOI: 10.1002/anie.202400837] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 03/07/2024]
Abstract
Magnesium batteries attract interest as alternative energy-storage devices because of elemental abundance and potential for high energy density. Development is limited by the absence of suitable cathodes, associated with poor diffusion kinetics resulting from strong interactions between Mg2+ and the host structure. V2PS10 is reported as a positive electrode material for rechargeable magnesium batteries. Cyclable capacity of 100 mAh g-1 is achieved with fast Mg2+ diffusion of 7.2 × ${\times }$ 10-11-4 × ${\times }$ 10-14 cm2 s-1. The fast insertion mechanism results from combined cationic redox on the V site and anionic redox on the (S2)2- site; enabled by reversible cleavage of S-S bonds, identified by X-ray photoelectron and X-ray absorption spectroscopy. Detailed structural characterisation with maximum entropy method analysis, supported by density functional theory and projected density of states analysis, reveals that the sulphur species involved in anion redox are not connected to the transition metal centres, spatially separating the two redox processes. This facilitates fast and reversible Mg insertion in which the nature of the redox process depends on the cation insertion site, creating a synergy between the occupancy of specific Mg sites and the location of the electrons transferred.
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Affiliation(s)
- Matthew A Wright
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, L69 7ZF, Liverpool, UK
| | - T Wesley Surta
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Jae A Evans
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Jungwoo Lim
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, L69 7ZF, Liverpool, UK
| | - Hongil Jo
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Cara J Hawkins
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Mounib Bahri
- Albert Crewe Centre, University of Liverpool, Research Technology Building, Elisabeth Street, Pembroke Place, L69 3GE, Liverpool, UK
| | - Luke M Daniels
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Ruiyong Chen
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Marco Zanella
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Luciana G Chagas
- Johnson Matthey Technology Centre, Sonning Common, RG4 9NH, Reading, UK
| | - James Cookson
- Johnson Matthey Technology Centre, Sonning Common, RG4 9NH, Reading, UK
| | - Paul Collier
- Johnson Matthey Technology Centre, Sonning Common, RG4 9NH, Reading, UK
| | - Giannantonio Cibin
- Diamond Light Source, Harwell Science and Innovation Campus, OX11 0DE, Didcot, UK
| | - Alan V Chadwick
- School of Physical Sciences, University of Kent, CT2 7NH, Canterbury, UK
| | - Matthew S Dyer
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Nigel D Browning
- Albert Crewe Centre, University of Liverpool, Research Technology Building, Elisabeth Street, Pembroke Place, L69 3GE, Liverpool, UK
- School of Engineering, Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, L69 3GH, Liverpool, UK
| | - John B Claridge
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Laurence J Hardwick
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, L69 7ZF, Liverpool, UK
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2
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Han G, Vasylenko A, Daniels LM, Collins CM, Corti L, Chen R, Niu H, Manning TD, Antypov D, Dyer MS, Lim J, Zanella M, Sonni M, Bahri M, Jo H, Dang Y, Robertson CM, Blanc F, Hardwick LJ, Browning ND, Claridge JB, Rosseinsky MJ. Superionic lithium transport via multiple coordination environments defined by two-anion packing. Science 2024; 383:739-745. [PMID: 38359130 DOI: 10.1126/science.adh5115] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 01/17/2024] [Indexed: 02/17/2024]
Abstract
Fast cation transport in solids underpins energy storage. Materials design has focused on structures that can define transport pathways with minimal cation coordination change, restricting attention to a small part of chemical space. Motivated by the greater structural diversity of binary intermetallics than that of the metallic elements, we used two anions to build a pathway for three-dimensional superionic lithium ion conductivity that exploits multiple cation coordination environments. Li7Si2S7I is a pure lithium ion conductor created by an ordering of sulphide and iodide that combines elements of hexagonal and cubic close-packing analogously to the structure of NiZr. The resulting diverse network of lithium positions with distinct geometries and anion coordination chemistries affords low barriers to transport, opening a large structural space for high cation conductivity.
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Affiliation(s)
- Guopeng Han
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Andrij Vasylenko
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Luke M Daniels
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Chris M Collins
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Lucia Corti
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
| | - Ruiyong Chen
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Hongjun Niu
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Troy D Manning
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Dmytro Antypov
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
| | - Matthew S Dyer
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
| | - Jungwoo Lim
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool L69 7ZF, UK
| | - Marco Zanella
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Manel Sonni
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Mounib Bahri
- Albert Crewe Centre, University of Liverpool, Research Technology Building, Elisabeth Street, Pembroke Place, Liverpool L69 3GE, UK
| | - Hongil Jo
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
| | - Yun Dang
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Craig M Robertson
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Frédéric Blanc
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool L69 7ZF, UK
| | - Laurence J Hardwick
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool L69 7ZF, UK
| | - Nigel D Browning
- Albert Crewe Centre, University of Liverpool, Research Technology Building, Elisabeth Street, Pembroke Place, Liverpool L69 3GE, UK
- School of Engineering, Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3GH, UK
| | - John B Claridge
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
| | - Matthew J Rosseinsky
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory, 51 Oxford Street, University of Liverpool, Liverpool L7 3NY, UK
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Burman JJ, Bahri M, Siachos I, Presser V, Mehdi BL. In Situ (S)TEM Study of Thermal Reduction Synthesis Pathway for Sulfur- containing Titanium MAX Phase to MXene Phase. Microsc Microanal 2023; 29:1579-1580. [PMID: 37613859 DOI: 10.1093/micmic/ozad067.812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- J J Burman
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, UK
- Albert Crewe Centre, University of Liverpool, UK
| | - M Bahri
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, UK
- Albert Crewe Centre, University of Liverpool, UK
| | - I Siachos
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, UK
- Albert Crewe Centre, University of Liverpool, UK
| | - V Presser
- INM - Leibniz-Institute für Neue Materialien gGmbH, Saarbrücken, Germany
| | - B Layla Mehdi
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, UK
- Albert Crewe Centre, University of Liverpool, UK
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4
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Bahri M, Schnaider Tontini F, de Keersmaecker ML, Ratcliff EL, Armstrong NR, Browning ND. FIB Sample Preparation and Low Dose STEM Characterisation Challenges of Hybrid Organic-inorganic Perovskite (HOIP) Solar Cells. Microsc Microanal 2023; 29:115-116. [PMID: 37613287 DOI: 10.1093/micmic/ozad067.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- M Bahri
- Albert Crewe Centre, University of Liverpool, Liverpool, UK
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool, UK
| | - F Schnaider Tontini
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool, UK
| | - M L de Keersmaecker
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - E L Ratcliff
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
- Laboratory for Interface Science of Printable Electronic Materials, University of Arizona, Tucson, AZ, USA
- Institute for Energy Solutions, University of Arizona, Tucson, AZ, USA
| | - N R Armstrong
- Institute for Energy Solutions, University of Arizona, Tucson, AZ, USA
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA
| | - N D Browning
- Albert Crewe Centre, University of Liverpool, Liverpool, UK
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool, UK
- Physical and Computational Sciences, Pacific Northwest National Lab, Richland, WA, USA
- Sivananthan Laboratories, Bolingbrook, IL, USA
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5
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Groysbeck N, Hanss V, Donzeau M, Strub JM, Cianférani S, Spehner D, Bahri M, Ersen O, Eltsov M, Schultz P, Zuber G. Bioactivated and PEG-Protected Circa 2 nm Gold Nanoparticles for in Cell Labelling and Cryo-Electron Microscopy. Small Methods 2023; 7:e2300098. [PMID: 37035956 DOI: 10.1002/smtd.202300098] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/09/2023] [Indexed: 06/09/2023]
Abstract
Advances in cryo-electron microscopy (EM) enable imaging of protein assemblies within mammalian cells in a near native state when samples are preserved by cryogenic vitrification. To accompany this progress, specialized EM labelling protocols must be developed. Gold nanoparticles (AuNPs) of 2 nm are synthesized and functionalized to bind selected intracellular targets inside living human cells and to be detected in vitreous sections. As a proof of concept, thioaminobenzoate-, thionitrobenzoate-coordinated gold nanoparticles are functionalized on their surface with SV40 Nuclear Localization Signal (NLS)-containing peptides and 2 kDa polyethyleneglycols (PEG) by thiolate exchange to target the importin-mediated nuclear machinery and facilitate cytosolic diffusion by shielding the AuNP surface from non-specific binding to cell components, respectively. After delivery by electroporation into the cytoplasm of living human cells, the PEG-coated AuNPs diffuse freely in the cytoplasm but do not enter the nucleus. Incorporation of NLS within the PEG coverage promotes a quick nuclear import of the nanoparticles in relation to the density of NLS onto the AuNPs. Cryo-EM of vitreous cell sections demonstrate the presence of 2 nm AuNPs as single entities in the nucleus. Biofunctionalized AuNPs combined with live-cell electroporation procedures are thus potent labeling tools for the identification of macromolecules in cellular cryo-EM.
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Affiliation(s)
- Nadja Groysbeck
- Université de Strasbourg - CNRS, UMR 7242, Biotechnologie et Signalisation Cellulaire, Boulevard Sebastien Brant, Illkirch, F-67400, France
| | - Victor Hanss
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 1 rue Laurent Fries, BP10142, Illkirch Cedex, F-67404, France
| | - Mariel Donzeau
- Université de Strasbourg - CNRS, UMR 7242, Biotechnologie et Signalisation Cellulaire, Boulevard Sebastien Brant, Illkirch, F-67400, France
| | - Jean-Marc Strub
- Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, F-67000, France
| | - Sarah Cianférani
- Laboratoire de Spectrométrie de Masse BioOrganique, Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, F-67000, France
| | - Danièle Spehner
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 1 rue Laurent Fries, BP10142, Illkirch Cedex, F-67404, France
| | - Mounib Bahri
- Albert Crewe Centre, University of Liverpool, 4. Waterhouse Building, Block C, 1-3 Brownlow Street, London, L69 3GL, UK
| | - Ovidiu Ersen
- Université de Strasbourg - CNRS, UMR 7504, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), 23 rue de Loess, Strasbourg, 67034, France
| | - Mikhael Eltsov
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 1 rue Laurent Fries, BP10142, Illkirch Cedex, F-67404, France
| | - Patrick Schultz
- Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 1 rue Laurent Fries, BP10142, Illkirch Cedex, F-67404, France
| | - Guy Zuber
- Université de Strasbourg - CNRS, UMR 7242, Biotechnologie et Signalisation Cellulaire, Boulevard Sebastien Brant, Illkirch, F-67400, France
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Oefner N, Shuck CE, Schumacher L, Heck F, Hofmann K, Schmidpeter J, Li W, Bahri M, Mehdi BL, Drochner A, Albert B, Hess C, Gogotsi Y, Etzold BJM. MXene Aerogel Derived Ultra-Active Vanadia Catalyst for Selective Conversion of Sustainable Alcohols to Base Chemicals. ACS Appl Mater Interfaces 2023; 15:16714-16722. [PMID: 36961995 DOI: 10.1021/acsami.2c22720] [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] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Selective oxidation reactions are an important class of the current chemical industry and will be highly important for future sustainable chemical production. Especially, the selective oxidation of primary alcohols is expected to be of high future interest, as alcohols can be obtained on technical scales from biomass fermentation. The oxidation of primary alcohols produces aldehydes, which are important intermediates. While selective methanol oxidation is industrially established, the commercial catalyst suffers from deactivation. Ethanol selective oxidation is not commercialized but would give access to sustainable acetaldehyde production when using renewable ethanol. In this work, it is shown that employing 2D MXenes as building blocks allows one to design a nanostructured oxide catalyst composed of mixed valence vanadium oxides, which outperforms on both reactions known materials by nearly an order of magnitude in activity, while showing high selectivity and stability. The study shows that the synthesis route employing 2D materials is key to obtain these attractive catalysts. V4C3Tx MXene structured as an aerogel precursor needs to be employed and mildly oxidized in an alcohol and oxygen atmosphere to result in the aspired nanostructured catalyst composed of mixed valence VO2, V6O13, and V3O7. Very likely, the bulk stable reduced valence state of the material together coupled with the nanorod arrangement allows for unprecedented oxygen mobility as well as active sites and results in an ultra-active catalyst.
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Affiliation(s)
- Niklas Oefner
- Technical University of Darmstadt, Department of Chemistry, Ernst-Berl-Institut für Technische und Makromolekulare Chemie, 64287 Darmstadt, Germany
| | - Christopher E Shuck
- A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Leon Schumacher
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, 64287 Darmstadt, Germany
| | - Franziska Heck
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, 64287 Darmstadt, Germany
| | - Kathrin Hofmann
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, 64287 Darmstadt, Germany
| | - Jana Schmidpeter
- Technical University of Darmstadt, Department of Chemistry, Ernst-Berl-Institut für Technische und Makromolekulare Chemie, 64287 Darmstadt, Germany
| | - Weiqun Li
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom
| | - Mounib Bahri
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom
| | - B Layla Mehdi
- Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3GH, United Kingdom
| | - Alfons Drochner
- Technical University of Darmstadt, Department of Chemistry, Ernst-Berl-Institut für Technische und Makromolekulare Chemie, 64287 Darmstadt, Germany
| | - Barbara Albert
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, 64287 Darmstadt, Germany
| | - Christian Hess
- Technical University of Darmstadt, Department of Chemistry, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, 64287 Darmstadt, Germany
| | - Yury Gogotsi
- A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Bastian J M Etzold
- Technical University of Darmstadt, Department of Chemistry, Ernst-Berl-Institut für Technische und Makromolekulare Chemie, 64287 Darmstadt, Germany
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Yang H, Li C, Liu T, Fellowes T, Chong SY, Catalano L, Bahri M, Zhang W, Xu Y, Liu L, Zhao W, Gardner AM, Clowes R, Browning ND, Li X, Cowan AJ, Cooper AI. Packing-induced selectivity switching in molecular nanoparticle photocatalysts for hydrogen and hydrogen peroxide production. Nat Nanotechnol 2023; 18:307-315. [PMID: 36702952 DOI: 10.1038/s41565-022-01289-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 11/07/2022] [Indexed: 06/18/2023]
Abstract
Molecular packing controls optoelectronic properties in organic molecular nanomaterials. Here we report a donor-acceptor organic molecule (2,6-bis(4-cyanophenyl)-4-(9-phenyl-9H-carbazol-3-yl)pyridine-3,5-dicarbonitrile) that exhibits two aggregate states in aqueous dispersions: amorphous nanospheres and ordered nanofibres with π-π molecular stacking. The nanofibres promote sacrificial photocatalytic H2 production (31.85 mmol g-1 h-1) while the nanospheres produce hydrogen peroxide (H2O2) (3.20 mmol g-1 h-1 in the presence of O2). This is the first example of an organic photocatalyst that can be directed to produce these two different solar fuels simply by changing the molecular packing. These different packings affect energy band levels, the extent of excited state delocalization, the excited state dynamics, charge transfer to O2 and the light absorption profile. We use a combination of structural and photophysical measurements to understand how this influences photocatalytic selectivity. This illustrates the potential to achieve multiple photocatalytic functionalities with a single organic molecule by engineering nanomorphology and solid-state packing.
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Affiliation(s)
- Haofan Yang
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, UK
| | - Chao Li
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool, UK
| | - Tao Liu
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
| | - Thomas Fellowes
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, UK
| | - Samantha Y Chong
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
| | - Luca Catalano
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
- Laboratoire de Chimie des Polymères, Université libre de Bruxelles (ULB), Brussels, Belgium
| | - Mounib Bahri
- Albert Crewe Centre for Electron Microscopy, University of Liverpool, Liverpool, UK
| | - Weiwei Zhang
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China
| | - Yongjie Xu
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, UK
| | - Lunjie Liu
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
| | - Wei Zhao
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, UK
| | - Adrian M Gardner
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool, UK
| | - Rob Clowes
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK
| | - Nigel D Browning
- Albert Crewe Centre for Electron Microscopy, University of Liverpool, Liverpool, UK
| | - Xiaobo Li
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK.
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, China.
| | - Alexander J Cowan
- Stephenson Institute for Renewable Energy, University of Liverpool, Liverpool, UK.
| | - Andrew I Cooper
- Materials Innovation Factory & Department of Chemistry, University of Liverpool, Liverpool, UK.
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, UK.
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Zhang M, Lidder J, Bahri M, Zhang H. Preparation of PLGA-Coated Porous Silica Nanofibers for Drug Release. Pharmaceutics 2022; 14:pharmaceutics14122660. [PMID: 36559154 PMCID: PMC9785363 DOI: 10.3390/pharmaceutics14122660] [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: 11/09/2022] [Revised: 11/23/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022] Open
Abstract
Fibrous materials have unique applications in drug release and biomedical fields. This study reports on the preparation of porous silica nanofibers, using organic nanofibers as templates, and their use for drug release. Different from the commonly used electrospinning method, the organic nanofibers are produced via a self-assembly approach between melamine and benzene-1,3,5-tricarboxylic acid. Silica is then coated on the organic nanofibers via homogenization in a silica sol, a freeze-drying process, and then a sol-gel process. In order to regulate the surface area and mesopore volume of silica nanofibers, cetyltrimethyl ammonium bromide at different concentrations is used as template in the sol-gel process. With the removal of organic nanofibers and the surfactant by calcination, porous silica nanofibers are generated and then assessed as a scaffold for controlled drug release with ketoprofen as a model drug. Poly (D, L-lactide-co-glycolide) is coated on the silica nanofibers to achieve slow burst release and prolonged cumulative release of 25 days. This study demonstrates an effective method of preparing hollow silica nanofibers and the use of such nanofibers for long-term release with high drug loading.
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Affiliation(s)
- Meina Zhang
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Jasmine Lidder
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Mounib Bahri
- Albert Crewe Centre for Electron Microscopy, University of Liverpool, Liverpool L69 3GL, UK
| | - Haifei Zhang
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
- Correspondence:
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Bai Y, Li C, Liu L, Yamaguchi Y, Bahri M, Yang H, Gardner A, Zwijnenburg MA, Browning ND, Cowan AJ, Kudo A, Cooper AI, Sprick RS. Photocatalytic Overall Water Splitting Under Visible Light Enabled by a Particulate Conjugated Polymer Loaded with Palladium and Iridium. Angew Chem Int Ed Engl 2022; 61:e202201299. [PMID: 35377540 PMCID: PMC9321674 DOI: 10.1002/anie.202201299] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 11/27/2022]
Abstract
Polymer photocatalysts have received growing attention in recent years for photocatalytic hydrogen production from water. Most studies report hydrogen production with sacrificial electron donors, which is unsuitable for large‐scale hydrogen energy production. Here we show that the palladium/iridium oxide‐loaded homopolymer of dibenzo[b,d]thiophene sulfone (P10) facilitates overall water splitting to produce stoichiometric amounts of H2 and O2 for an extended period (>60 hours) after the system stabilized. These results demonstrate that conjugated polymers can act as single component photocatalytic systems for overall water splitting when loaded with suitable co‐catalysts, albeit currently with low activities. Transient spectroscopy shows that the IrO2 co‐catalyst plays an important role in the generation of the charge separated state required for water splitting, with evidence for fast hole transfer to the co‐catalyst.
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Affiliation(s)
- Yang Bai
- Materials Innovation Factory & Department of ChemistryUniversity of LiverpoolLiverpoolL7 3NYUK
- Institute of Materials Research and EngineeringAgency for Science Technology and ResearchSingapore138634Singapore
| | - Chao Li
- Stephenson Institute for Renewable EnergyUniversity of LiverpoolLiverpoolL69 7ZFUK
| | - Lunjie Liu
- Materials Innovation Factory & Department of ChemistryUniversity of LiverpoolLiverpoolL7 3NYUK
| | - Yuichi Yamaguchi
- Department of Applied ChemistryTokyo University of ScienceTokyo162-8601Japan
| | - Mounib Bahri
- Albert Crewe Centre for Electron MicroscopyUniversity of LiverpoolLiverpoolL69 3GLUK
| | - Haofan Yang
- Materials Innovation Factory & Department of ChemistryUniversity of LiverpoolLiverpoolL7 3NYUK
| | - Adrian Gardner
- Stephenson Institute for Renewable EnergyUniversity of LiverpoolLiverpoolL69 7ZFUK
| | | | - Nigel D. Browning
- Albert Crewe Centre for Electron MicroscopyUniversity of LiverpoolLiverpoolL69 3GLUK
| | - Alexander J. Cowan
- Stephenson Institute for Renewable EnergyUniversity of LiverpoolLiverpoolL69 7ZFUK
| | - Akihiko Kudo
- Department of Applied ChemistryTokyo University of ScienceTokyo162-8601Japan
| | - Andrew I. Cooper
- Materials Innovation Factory & Department of ChemistryUniversity of LiverpoolLiverpoolL7 3NYUK
| | - Reiner Sebastian Sprick
- Materials Innovation Factory & Department of ChemistryUniversity of LiverpoolLiverpoolL7 3NYUK
- Department of Pure and Applied ChemistryUniversity of StrathclydeGlasgowG1 1XLUK
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10
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Zhao W, Yan P, Li B, Bahri M, Liu L, Zhou X, Clowes R, Browning ND, Wu Y, Ward JW, Cooper AI. Accelerated Synthesis and Discovery of Covalent Organic Framework Photocatalysts for Hydrogen Peroxide Production. J Am Chem Soc 2022; 144:9902-9909. [PMID: 35635501 PMCID: PMC9185744 DOI: 10.1021/jacs.2c02666] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Zhao
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Peiyao Yan
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Boyu Li
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Mounib Bahri
- Albert Crewe Centre for Electron Microscopy, University of Liverpool, Liverpool L69 3GL, United Kingdom
| | - Lunjie Liu
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Xiang Zhou
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Rob Clowes
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Nigel D. Browning
- Albert Crewe Centre for Electron Microscopy, University of Liverpool, Liverpool L69 3GL, United Kingdom
| | - Yue Wu
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - John W. Ward
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
| | - Andrew I. Cooper
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
- Leverhulme Research Centre for Functional Materials Design, Materials Innovation Factory and Department of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
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11
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Liu W, Morfin F, Provost K, Bahri M, Baaziz W, Ersen O, Piccolo L, Zlotea C. Unveiling the Ir single atoms as selective active species for the partial hydrogenation of butadiene by operando XAS. Nanoscale 2022; 14:7641-7649. [PMID: 35548860 DOI: 10.1039/d2nr00994c] [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] [Indexed: 06/15/2023]
Abstract
Single-atom catalysts represent an intense topic of research due to their interesting catalytic properties for a wide range of reactions. Clarifying the nature of the active sites of single-atom catalysts under realistic working conditions is of paramount importance for the design of performant materials. We have prepared an Ir single-atom catalyst supported on a nitrogen-rich carbon substrate that has proven to exhibit substantial activity toward the hydrogenation of butadiene with nearly 100% selectivity to butenes even at full conversion. We evidence here, by quantitative operando X-ray absorption spectroscopy, that the initial Ir single atoms are coordinated with four light atoms i.e., Ir-X4 (X = C/N/O) with an oxidation state of +3.2. During pre-treatment under hydrogen flow at 250 °C, the Ir atom loses one neighbour (possibly oxygen) and partially reduces to an oxidation state of around +2.0. We clearly demonstrate that Ir-X3 (X = C/N/O) is an active species with very good stability under reactive conditions. Moreover, Ir single atoms remain isolated under a reducing atmosphere at a temperature as high as 400 °C.
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Affiliation(s)
- W Liu
- Université Paris Est, Institut de Chimie et des Matériaux Paris-Est (UMR7182), CNRS, UPEC, 2-8 rue Henri Dunant, 94320 Thiais, France.
| | - F Morfin
- Univ. Lyon, Université Claude Bernard - Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne Cedex, France
| | - K Provost
- Université Paris Est, Institut de Chimie et des Matériaux Paris-Est (UMR7182), CNRS, UPEC, 2-8 rue Henri Dunant, 94320 Thiais, France.
| | - M Bahri
- Université de Strasbourg, Institut de Physique et Chimie des Matériaux de Strasbourg (UMR7504), 23 rue du Loess, BP 34 67034 Strasbourg Cedex 2, France
| | - W Baaziz
- Université de Strasbourg, Institut de Physique et Chimie des Matériaux de Strasbourg (UMR7504), 23 rue du Loess, BP 34 67034 Strasbourg Cedex 2, France
| | - O Ersen
- Université de Strasbourg, Institut de Physique et Chimie des Matériaux de Strasbourg (UMR7504), 23 rue du Loess, BP 34 67034 Strasbourg Cedex 2, France
| | - L Piccolo
- Univ. Lyon, Université Claude Bernard - Lyon 1, CNRS, IRCELYON - UMR 5256, 2 Avenue Albert Einstein, F-69626 Villeurbanne Cedex, France
| | - C Zlotea
- Université Paris Est, Institut de Chimie et des Matériaux Paris-Est (UMR7182), CNRS, UPEC, 2-8 rue Henri Dunant, 94320 Thiais, France.
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12
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Gao H, Neale AR, Zhu Q, Bahri M, Wang X, Yang H, Xu Y, Clowes R, Browning ND, Little MA, Hardwick LJ, Cooper AI. A Pyrene-4,5,9,10-Tetraone-Based Covalent Organic Framework Delivers High Specific Capacity as a Li-Ion Positive Electrode. J Am Chem Soc 2022; 144:9434-9442. [PMID: 35588159 PMCID: PMC9164232 DOI: 10.1021/jacs.2c02196] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Electrochemically active covalent organic frameworks (COFs) are promising electrode materials for Li-ion batteries. However, improving the specific capacities of COF-based electrodes requires materials with increased conductivity and a higher concentration of redox-active groups. Here, we designed a series of pyrene-4,5,9,10-tetraone COF (PT-COF) and carbon nanotube (CNT) composites (denoted as PT-COFX, where X = 10, 30, and 50 wt % of CNT) to address these challenges. Among the composites, PT-COF50 achieved a capacity of up to 280 mAh g-1 as normalized to the active COF material at a current density of 200 mA g-1, which is the highest capacity reported for a COF-based composite cathode electrode to date. Furthermore, PT-COF50 exhibited excellent rate performance, delivering a capacity of 229 mAh g-1 at 5000 mA g-1 (18.5C). Using operando Raman microscopy the reversible transformation of the redox-active carbonyl groups of PT-COF was determined, which rationalizes an overall 4 e-/4 Li+ redox process per pyrene-4,5,9,10-tetraone unit, accounting for its superior performance as a Li-ion battery electrode.
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Affiliation(s)
- Hui Gao
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K.,Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool, Peach Street, Liverpool L69 7ZF, U.K
| | - Alex R Neale
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool, Peach Street, Liverpool L69 7ZF, U.K
| | - Qiang Zhu
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K.,Leverhulme Research Centre for Functional Materials Design, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K
| | - Mounib Bahri
- Albert Crewe Centre, University of Liverpool, Waterhouse Building, Block C, 1-3 Brownlow Street, Liverpool L69 3GL, U.K
| | - Xue Wang
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K.,Leverhulme Research Centre for Functional Materials Design, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K
| | - Haofan Yang
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K.,Leverhulme Research Centre for Functional Materials Design, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K
| | - Yongjie Xu
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K.,Leverhulme Research Centre for Functional Materials Design, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K
| | - Rob Clowes
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K
| | - Nigel D Browning
- Albert Crewe Centre, University of Liverpool, Waterhouse Building, Block C, 1-3 Brownlow Street, Liverpool L69 3GL, U.K
| | - Marc A Little
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K
| | - Laurence J Hardwick
- Stephenson Institute for Renewable Energy, Department of Chemistry, University of Liverpool, Peach Street, Liverpool L69 7ZF, U.K
| | - Andrew I Cooper
- Materials Innovation Factory and Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K.,Leverhulme Research Centre for Functional Materials Design, University of Liverpool, 51 Oxford Street, Liverpool L7 3NY, U.K
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13
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Bai Y, Li C, Liu L, Yamaguchi Y, Bahri M, Yang H, Gardner A, Zwijnenburg MA, Browning ND, Cowan AJ, Kudo A, Cooper AI, Sprick RS. Photocatalytic Overall Water Splitting Under Visible Light Enabled by a Particulate Conjugated Polymer Loaded with Palladium and Iridium**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201299] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yang Bai
- Materials Innovation Factory & Department of Chemistry University of Liverpool Liverpool L7 3NY UK
- Institute of Materials Research and Engineering Agency for Science Technology and Research Singapore 138634 Singapore
| | - Chao Li
- Stephenson Institute for Renewable Energy University of Liverpool Liverpool L69 7ZF UK
| | - Lunjie Liu
- Materials Innovation Factory & Department of Chemistry University of Liverpool Liverpool L7 3NY UK
| | - Yuichi Yamaguchi
- Department of Applied Chemistry Tokyo University of Science Tokyo 162-8601 Japan
| | - Mounib Bahri
- Albert Crewe Centre for Electron Microscopy University of Liverpool Liverpool L69 3GL UK
| | - Haofan Yang
- Materials Innovation Factory & Department of Chemistry University of Liverpool Liverpool L7 3NY UK
| | - Adrian Gardner
- Stephenson Institute for Renewable Energy University of Liverpool Liverpool L69 7ZF UK
| | | | - Nigel D. Browning
- Albert Crewe Centre for Electron Microscopy University of Liverpool Liverpool L69 3GL UK
| | - Alexander J. Cowan
- Stephenson Institute for Renewable Energy University of Liverpool Liverpool L69 7ZF UK
| | - Akihiko Kudo
- Department of Applied Chemistry Tokyo University of Science Tokyo 162-8601 Japan
| | - Andrew I. Cooper
- Materials Innovation Factory & Department of Chemistry University of Liverpool Liverpool L7 3NY UK
| | - Reiner Sebastian Sprick
- Materials Innovation Factory & Department of Chemistry University of Liverpool Liverpool L7 3NY UK
- Department of Pure and Applied Chemistry University of Strathclyde Glasgow G1 1XL UK
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14
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Chen H, Gardner A, Lin G, Zhao W, Bahri M, Browning N, Sprick RS, Li X, Xu X, Cooper A. Covalent Triazine-Based Frameworks with Cobalt-Loading for Visible Light-Driven Photocatalytic Water Oxidation. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00773h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conjugated polymers have received significant attention as photocatalysts. However, photocatalytic oxygen evolution has only been reported for a few polymers so far. Here, we present a bipyridine-based covalent triazine-based framework...
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15
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Groysbeck N, Donzeau M, Stoessel A, Haeberle AM, Ory S, Spehner D, Schultz P, Ersen O, Bahri M, Ihiawakrim D, Zuber G. Gold labelling of a green fluorescent protein (GFP)-tag inside cells using recombinant nanobodies conjugated to 2.4 nm thiolate-coated gold nanoparticles. Nanoscale Adv 2021; 3:6940-6948. [PMID: 36132366 PMCID: PMC9417625 DOI: 10.1039/d1na00256b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 09/24/2021] [Indexed: 06/15/2023]
Abstract
Advances in microscopy technology have prompted efforts to improve the reagents required to recognize specific molecules within the intracellular environment. For high-resolution electron microscopy, conjugation of selective binders originating from the immune response arsenal to gold nanoparticles (AuNPs) as contrasting agents is the method of choice to obtain labeling tools. However, conjugation of the minimal sized 15 kDa nanobody (Nb) to AuNPs remains challenging in comparison to the conjugation of 150 kDa IgG to AuNPs. Herein, effective Nb-AuNP assemblies are built using the selective and almost irreversible non-covalent associations between two peptide sequences deriving from a p53 heterotetramer domain variant. The 15 kDa GFP-binding Nb is fused to one dimerizing motif to obtain a recombinant Nb dimer with improved avidity for GFP while the other complementing dimerizing motif is equipped with thiols and grafted to a 2.4 nm substituted thiobenzoate-coordinated AuNP via thiolate exchange. After pegylation, the modified AuNPs are able to non-covalently anchor Nb dimers and the subsequent complexes demonstrate the ability to form immunogold label GFP-protein fusions within various subcellular locations. These tools open an avenue for precise localization of targets at high resolution by electron microscopy.
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Affiliation(s)
- Nadja Groysbeck
- Université de Strasbourg - CNRS, UMR 7242 Laboratoire de Biotechnologie et Signalisation Cellulaire Boulevard Sébastien Brant 67400 Illkirch France
| | - Mariel Donzeau
- Université de Strasbourg - CNRS, UMR 7242 Laboratoire de Biotechnologie et Signalisation Cellulaire Boulevard Sébastien Brant 67400 Illkirch France
| | - Audrey Stoessel
- Université de Strasbourg - CNRS, UMR 7242 Laboratoire de Biotechnologie et Signalisation Cellulaire Boulevard Sébastien Brant 67400 Illkirch France
| | - Anne-Marie Haeberle
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives F-67000 Strasbourg France
| | - Stéphane Ory
- Centre National de la Recherche Scientifique, Université de Strasbourg, Institut des Neurosciences Cellulaires et Intégratives F-67000 Strasbourg France
| | - Danièle Spehner
- Université de Strasbourg - Department of Integrated Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire 67400 Illkirch France
| | - Patrick Schultz
- Université de Strasbourg - Department of Integrated Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire 67400 Illkirch France
| | - Ovidiu Ersen
- Université de Strasbourg - CNRS, UMR 7504, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) 23 rue de Loess 67034 Strasbourg France
| | - Mounib Bahri
- Université de Strasbourg - CNRS, UMR 7504, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) 23 rue de Loess 67034 Strasbourg France
| | - Dris Ihiawakrim
- Université de Strasbourg - CNRS, UMR 7504, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) 23 rue de Loess 67034 Strasbourg France
| | - Guy Zuber
- Université de Strasbourg - CNRS, UMR 7242 Laboratoire de Biotechnologie et Signalisation Cellulaire Boulevard Sébastien Brant 67400 Illkirch France
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16
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Wang X, Bahri M, Fu Z, Little MA, Liu L, Niu H, Browning ND, Chong SY, Chen L, Ward JW, Cooper AI. A Cubic 3D Covalent Organic Framework with nbo Topology. J Am Chem Soc 2021; 143:15011-15016. [PMID: 34516737 DOI: 10.1021/jacs.1c08351] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The synthesis of three-dimensional (3D) covalent organic frameworks (COFs) requires high-connectivity polyhedral building blocks or the controlled alignment of building blocks. Here, we use the latter strategy to assemble square-planar cobalt(II) phthalocyanine (PcCo) units into the nbo topology by using tetrahedral spiroborate (SPB) linkages that were chosen to provide the necessary 90° dihedral angles between neighboring PcCo units. This yields a porous 3D COF, SPB-COF-DBA, with a noninterpenetrated nbo topology. SPB-COF-DBA shows high crystallinity and long-range order, with 11 resolved diffraction peaks in the experimental powder X-ray diffraction (PXRD) pattern. This well-ordered crystal lattice can also be imaged by using high-resolution transmission electron microscopy (HR-TEM). SPB-COF-DBA has cubic pores and exhibits permanent porosity with a Brunauer-Emmett-Teller (BET) surface area of 1726 m2 g-1.
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Affiliation(s)
- Xue Wang
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, L7 3NY, U.K.,Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - Mounib Bahri
- Albert Crewe Centre for Electron Microscopy, University of Liverpool, Liverpool, L69 3GL, U.K
| | - Zhiwei Fu
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - Marc A Little
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - Lunjie Liu
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - Hongjun Niu
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - Nigel D Browning
- Albert Crewe Centre for Electron Microscopy, University of Liverpool, Liverpool, L69 3GL, U.K
| | - Samantha Y Chong
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - Linjiang Chen
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, L7 3NY, U.K.,Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - John W Ward
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, L7 3NY, U.K.,Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
| | - Andrew I Cooper
- Leverhulme Research Centre for Functional Materials Design, University of Liverpool, Liverpool, L7 3NY, U.K.,Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool, L69 7ZD, U.K
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17
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Zhou H, Huang H, Bahri M, Browning ND, Smith J, Graham M, Shchukin D. Communicating assemblies of biomimetic nanocapsules. Nanoscale 2021; 13:11343-11348. [PMID: 34165134 PMCID: PMC8265773 DOI: 10.1039/d1nr03170h] [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] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
Communication assemblies between biomimetic nanocapsules in a 3D closed system with self-regulating and self-organization functionalities were demonstrated for the first time. Two types of biomimetic nanocapsules, TiO2/polydopamine capsules and SiO2/polyelectrolytes capsules with different stimuli-responsive properties were prepared and leveraged to sense the external stimulus, transmit chemical signaling, and autonomic communication-controlled release of active cargos. The capsules have clear core-shell structures with average diameters of 30 nm and 25 nm, respectively. The nitrogen adsorption-desorption isotherms and thermogravimetric analysis displayed their massive pore structures and encapsulation capacity of 32% of glycine pH buffer and 68% of benzotriazole, respectively. Different from the direct release mode of the single capsule, the communication assemblies show an autonomic three-stage release process with a "jet lag" feature, showing the internal modulation ability of self-controlled release efficiency. The control overweight ratios of capsules influences on communication-release interaction between capsules. The highest communication-release efficiency (89.6% of benzotriazole) was achieved when the weight ratio of TiO2/polydopamine/SiO2/polyelectrolytes capsules was 5 : 1 or 10 : 1. Communication assemblies containing various types of nanocapsules can autonomically perform complex tasks in a biomimetic fashion, such as cascaded amplification and multidirectional communication platforms in bioreactors.
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Affiliation(s)
- Hongda Zhou
- Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.
| | - Haowei Huang
- Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK. and School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Mounib Bahri
- Albert Crewe Centre, University of Liverpool, Liverpool, L69 3GL, UK
| | - Nigel D Browning
- Albert Crewe Centre, University of Liverpool, Liverpool, L69 3GL, UK
| | - James Smith
- Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.
| | - Michael Graham
- Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.
| | - Dmitry Shchukin
- Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.
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18
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Sharna S, Bahri M, Bouillet C, Rouchon V, Lambert A, Gay AS, Chiche D, Ersen O. In situ STEM study on the morphological evolution of copper-based nanoparticles during high-temperature redox reactions. Nanoscale 2021; 13:9747-9756. [PMID: 34019612 DOI: 10.1039/d1nr01648b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Despite the broad relevance of copper nanoparticles in industrial applications, the fundamental understanding of oxidation and reduction of copper at the nanoscale is still a matter of debate and remains within the realm of bulk or thin film-based systems. Moreover, the reported studies on nanoparticles vary widely in terms of experimental parameters and are predominantly carried out using either ex situ observation or environmental transmission electron microscopy in a gaseous atmosphere at low pressure. Hence, dedicated studies in regards to the morphological transformations and structural transitions of copper-based nanoparticles at a wider range of temperatures and under industrially relevant pressure would provide valuable insights to improve the application-specific material design. In this paper, copper nanoparticles are studied using in situ Scanning Transmission Electron Microscopy to discern the transformation of the nanoparticles induced by oxidative and reductive environments at high temperatures. The nanoparticles were subjected to a temperature of 150 °C to 900 °C at 0.5 atm partial pressure of the reactive gas, which resulted in different modes of copper mobility both within the individual nanoparticles and on the surface of the support. Oxidation at an incremental temperature revealed the dependency of the nanoparticles' morphological evolution on their initial size as well as reaction temperature. After the formation of an initial thin layer of oxide, the nanoparticles evolved to form hollow oxide shells. The kinetics of formation of hollow particles were simulated using a reaction-diffusion model to determine the activation energy of diffusion and temperature-dependent diffusion coefficient of copper in copper oxide. Upon further temperature increase, the hollow shell collapsed to form compact and facetted nanoparticles. Reduction of copper oxide was carried out at different temperatures starting from various oxide phase morphologies. A reduction mechanism is proposed based on the dynamic of the reduction-induced fragmentation of the oxide phase. In a broader perspective, this study offers insights into the mobility of the copper phase during its oxidation-reduction process in terms of microstructural evolution as a function of nanoparticle size, reaction gas, and temperature.
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Affiliation(s)
- Sharmin Sharna
- IFP Energies Nouvelles, Rond-Point de l'échangeur de Solaize, 69360 Solaize, France
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19
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Dembélé K, Bahri M, Hirlimann C, Moldovan S, Berliet A, Maury S, Gay A, Ersen O. Front Cover:
Operando
Electron Microscopy Study of Cobalt‐based Fischer‐Tropsch Nanocatalysts (ChemCatChem 8/2021). ChemCatChem 2021. [DOI: 10.1002/cctc.202100388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kassiogé Dembélé
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
| | - Charles Hirlimann
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
| | - Simona Moldovan
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
| | - Adrien Berliet
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Sylvie Maury
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Anne‐Sophie Gay
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
- Institut Universitaire de France (IUF) 1 Rue Descartes Paris 75231 France
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Dembélé K, Bahri M, Hirlimann C, Moldovan S, Berliet A, Maury S, Gay A, Ersen O. Operando
Electron Microscopy Study of Cobalt‐based Fischer‐Tropsch Nanocatalysts. ChemCatChem 2020. [DOI: 10.1002/cctc.202001074] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kassiogé Dembélé
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
| | - Charles Hirlimann
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
| | - Simona Moldovan
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
| | - Adrien Berliet
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Sylvie Maury
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Anne‐Sophie Gay
- IFP Énergies Nouvelles Rond-point de l'échangeur de Solaize 69360 Solaize France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) UMR 7504 CNRS – Université de Strasbourg 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2 France
- Institut Universitaire de France (IUF) 1 Rue Descartes Paris 75231 France
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Muller C, Berber E, Lutzweiler G, Ersen O, Bahri M, Lavalle P, Ball V, Vrana NE, Barthes J. Polyarginine Decorated Polydopamine Nanoparticles With Antimicrobial Properties for Functionalization of Hydrogels. Front Bioeng Biotechnol 2020; 8:982. [PMID: 32974312 PMCID: PMC7461895 DOI: 10.3389/fbioe.2020.00982] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 03/26/2020] [Accepted: 07/28/2020] [Indexed: 11/13/2022] Open
Abstract
Polydopamine (PDA) nanoparticles are versatile structures that can be stabilized with proteins. In this study, we have demonstrated the feasibility of developing PDA/polypeptides complexes in the shape of nanoparticles. The polypeptide can also render the nanoparticle functional. Herein, we have developed antimicrobial nanoparticles with a narrow size distribution by decorating the polydopamine particles with a chain-length controlled antimicrobial agent Polyarginine (PAR). The obtained particles were 3.9 ± 1.7 nm in diameter and were not cytotoxic at 1:20 dilution and above. PAR-decorated nanoparticles have exhibited a strong antimicrobial activity against S. aureus, one of the most common pathogen involved in implant infections. The minimum inhibitory concentration is 5 times less than the cytotoxicity levels. Then, PAR-decorated nanoparticles have been incorporated into gelatin hydrogels used as a model of tissue engineering scaffolds. These nanoparticles have given hydrogels strong antimicrobial properties without affecting their stability and biocompatibility while improving their mechanical properties (modulus of increased storage). Decorated polydopamine nanoparticles can be a versatile tool for the functionalization of hydrogels in regenerative medicine applications by providing bioactive properties.
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Affiliation(s)
- Céline Muller
- Institut National de la Santé et de la Recherche Médicale, INSERM UMR 1121 “Biomaterials and Bioengineering”, Strasbourg, France
| | - Emine Berber
- Institut National de la Santé et de la Recherche Médicale, INSERM UMR 1121 “Biomaterials and Bioengineering”, Strasbourg, France
| | - Gaetan Lutzweiler
- Institut National de la Santé et de la Recherche Médicale, INSERM UMR 1121 “Biomaterials and Bioengineering”, Strasbourg, France
- Université de Strasbourg, CNRS, Institut Charles Sadron, Strasbourg, France
| | - Ovidiu Ersen
- IPCMS, Institut de Physique et de Chimie des Matériaux de Strasbourg, CNRS-UMRS 7504, Strasbourg, France
| | - Mounib Bahri
- IPCMS, Institut de Physique et de Chimie des Matériaux de Strasbourg, CNRS-UMRS 7504, Strasbourg, France
| | - Philippe Lavalle
- Institut National de la Santé et de la Recherche Médicale, INSERM UMR 1121 “Biomaterials and Bioengineering”, Strasbourg, France
| | - Vincent Ball
- Institut National de la Santé et de la Recherche Médicale, INSERM UMR 1121 “Biomaterials and Bioengineering”, Strasbourg, France
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Strasbourg, France
| | - Nihal E. Vrana
- Institut National de la Santé et de la Recherche Médicale, INSERM UMR 1121 “Biomaterials and Bioengineering”, Strasbourg, France
- Spartha Medical, Strasbourg, France
| | - Julien Barthes
- Institut National de la Santé et de la Recherche Médicale, INSERM UMR 1121 “Biomaterials and Bioengineering”, Strasbourg, France
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22
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Kumar R, Bahri M, Song Y, Gonell F, Thomas C, Ersen O, Sanchez C, Laberty-Robert C, Portehault D. Phase selective synthesis of nickel silicide nanocrystals in molten salts for electrocatalysis of the oxygen evolution reaction. Nanoscale 2020; 12:15209-15213. [PMID: 32638791 DOI: 10.1039/d0nr04284f] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report phase selective synthesis of intermetallic nickel silicide nanocrystals in inorganic molten salts. NiSi and Ni2Si nanocrystals are obtained by reacting a nickel(ii) salt and sodium silicide Na4Si4 in the molten LiI-KI inorganic eutectic salt mixture. We report that nickel silicide nanocrystals are precursors to active electrocatalysts in the oxygen evolution reaction (OER) and may be low-cost alternatives to iridium-based electrocatalysts.
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Affiliation(s)
- Ram Kumar
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, F-75005, Paris, France.
| | - Mounib Bahri
- Université de Strasbourg, CNRS, Institut de physique et de chimie des Matériaux de Strasbourg (IPCMS), 23 rue du Loess, 67200 Strasbourg, France
| | - Yang Song
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, F-75005, Paris, France.
| | - Francisco Gonell
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, F-75005, Paris, France.
| | - Cyril Thomas
- Sorbonne Université, CNRS, Laboratoire de Réactivité de la Surface (LRS), 4 place Jussieu, F-75005, Paris, France
| | - Ovidiu Ersen
- Université de Strasbourg, CNRS, Institut de physique et de chimie des Matériaux de Strasbourg (IPCMS), 23 rue du Loess, 67200 Strasbourg, France
| | - Clément Sanchez
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, F-75005, Paris, France.
| | - Christel Laberty-Robert
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, F-75005, Paris, France.
| | - David Portehault
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (CMCP), 4 place Jussieu, F-75005, Paris, France.
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23
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Gu B, Peron DV, Barrios AJ, Bahri M, Ersen O, Vorokhta M, Šmíd B, Banerjee D, Virginie M, Marceau E, Wojcieszak R, Ordomsky VV, Khodakov AY. Mobility and versatility of the liquid bismuth promoter in the working iron catalysts for light olefin synthesis from syngas. Chem Sci 2020; 11:6167-6182. [PMID: 32953012 PMCID: PMC7480519 DOI: 10.1039/d0sc01600d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 03/17/2020] [Accepted: 05/27/2020] [Indexed: 11/21/2022] Open
Abstract
Liquid metals are a new emerging and rapidly growing class of materials and can be considered as efficient promoters and active phases for heterogeneous catalysts for sustainable processes. Because of low cost, high selectivity and flexibility, iron-based catalysts are the catalysts of choice for light olefin synthesis via Fischer-Tropsch reaction. Promotion of iron catalysts supported by carbon nanotubes with bismuth, which is liquid under the reaction conditions, results in a several fold increase in the reaction rate and in a much higher light olefin selectivity. In order to elucidate the spectacular enhancement of the catalytic performance, we conducted extensive in-depth characterization of the bismuth-promoted iron catalysts under the reacting gas and reaction temperatures by a combination of cutting-edge in situ techniques: in situ scanning transmission electron microscopy, near-atmospheric pressure X-ray photoelectron spectroscopy and in situ X-ray adsorption near edge structure. In situ scanning transmission electron microscopy conducted under atmospheric pressure of carbon monoxide at the temperature of catalyst activation showed iron sintering proceeding via the particle migration and coalescence mechanism. Catalyst activation in carbon monoxide and in syngas leads to liquid bismuth metallic species, which readily migrate over the catalyst surface with the formation of larger spherical bismuth droplets and iron-bismuth core-shell structures. In the working catalysts, during Fischer-Tropsch synthesis, metallic bismuth located at the interface of iron species undergoes continuous oxidation and reduction cycles, which facilitate carbon monoxide dissociation and result in the substantial increase in the reaction rate.
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Affiliation(s)
- Bang Gu
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
| | - Deizi V Peron
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
| | - Alan J Barrios
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
| | - Mounib Bahri
- IPCMS-UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess, BP 43-67034 Strasbourg Cedex 2 , France
| | - Ovidiu Ersen
- IPCMS-UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess, BP 43-67034 Strasbourg Cedex 2 , France
| | - Mykhailo Vorokhta
- Department of Surface and Plasma Science , Faculty of Mathematics and Physics , Charles University , V Holešovičkách 747/2, 180 00 Praha 8 , Czechia
| | - Břetislav Šmíd
- Department of Surface and Plasma Science , Faculty of Mathematics and Physics , Charles University , V Holešovičkách 747/2, 180 00 Praha 8 , Czechia
| | - Dipanjan Banerjee
- Dutch-Belgian Beamline (DUBBLE) , European Synchrotron Radiation Facility , 71 Avenue des Martyrs , 38000 Grenoble , France.,Department of Chemistry , KU Leuven , Celestijnenlaan 200F Box 2404 , 3001 Leuven , Belgium
| | - Mirella Virginie
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
| | - Eric Marceau
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
| | - Robert Wojcieszak
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
| | - Vitaly V Ordomsky
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
| | - Andrei Y Khodakov
- CNRS , UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , Centrale Lille , Univ. Lille , Univ. Artois , F-59000 Lille , France .
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Frikha M, Zouari S, Fourati N, Kallel M, Elloumi F, Bahri M, Siala W, Boudawara T, Khanfir A, Mnejja W, Daoud J. 36P Molecular subtypes in Tunisian breast cancer. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.03.170] [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: 11/25/2022] Open
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Niu F, Yan Z, Kusema BT, Bahri M, Ersen O, Khodakov AY, Ordomsky VV. Disassembly of Supported Co and Ni Nanoparticles by Carbon Deposition for the Synthesis of Highly Dispersed and Active Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Feng Niu
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
- E2P2L, UMI 3464 CNRS-Solvay, 3966 Jin Du Road, 201108 Shanghai, People’s Republic of China
| | - Zhen Yan
- E2P2L, UMI 3464 CNRS-Solvay, 3966 Jin Du Road, 201108 Shanghai, People’s Republic of China
| | - Bright T. Kusema
- E2P2L, UMI 3464 CNRS-Solvay, 3966 Jin Du Road, 201108 Shanghai, People’s Republic of China
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)-UMR 7504 CNRS, Université de Strasbourg, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)-UMR 7504 CNRS, Université de Strasbourg, 23 rue du Loess, BP 43, 67034 Strasbourg Cedex 2, France
| | - Andrei Y. Khodakov
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Vitaly V. Ordomsky
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
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26
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Cypriano J, Bahri M, Dembelé K, Baaziz W, Leão P, Bazylinski DA, Abreu F, Ersen O, Farina M, Werckmann J. Insight on thermal stability of magnetite magnetosomes: implications for the fossil record and biotechnology. Sci Rep 2020; 10:6706. [PMID: 32317676 PMCID: PMC7174351 DOI: 10.1038/s41598-020-63531-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 07/30/2019] [Accepted: 03/25/2020] [Indexed: 11/14/2022] Open
Abstract
Magnetosomes are intracellular magnetic nanocrystals composed of magnetite (Fe3O4) or greigite (Fe3S4), enveloped by a lipid bilayer membrane, produced by magnetotactic bacteria. Because of the stability of these structures in certain environments after cell death and lysis, magnetosome magnetite crystals contribute to the magnetization of sediments as well as providing a fossil record of ancient microbial ecosystems. The persistence or changes of the chemical and magnetic features of magnetosomes under certain conditions in different environments are important factors in biotechnology and paleomagnetism. Here we evaluated the thermal stability of magnetosomes in a temperature range between 150 and 500 °C subjected to oxidizing conditions by using in situ scanning transmission electron microscopy. Results showed that magnetosomes are stable and structurally and chemically unaffected at temperatures up to 300 °C. Interestingly, the membrane of magnetosomes was still observable after heating the samples to 300 °C. When heated between 300 °C and 500 °C cavity formation in the crystals was observed most probably associated to the partial transformation of magnetite into maghemite due to the Kirkendall effect at the nanoscale. This study provides some insight into the stability of magnetosomes in specific environments over geological periods and offers novel tools to investigate biogenic nanomaterials.
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Affiliation(s)
- Jefferson Cypriano
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France
| | - Kassiogé Dembelé
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France.,Fritz-Haber-Institut der Max-Planck-Gesellschaft, Department of Inorganic Chemistry, Faradayweg 4-6, 14195, Berlin, Germany
| | - Walid Baaziz
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France
| | - Pedro Leão
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Dennis A Bazylinski
- School of Life Sciences, University of Nevada at Las Vegas, Las Vegas, 89154-4004, USA
| | - Fernanda Abreu
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS-Université de Strasbourg, 23 rue du Loess, 67034, Strasbourg, France
| | - Marcos Farina
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil
| | - Jacques Werckmann
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, 21941-902, Rio de Janeiro, Brazil. .,Centro Brasileiro de Pesquisas Físicas, LABNANO, rua Xavier Sigaud, 150, CEP, 22290-180, Rio de Janeiro, Brazil.
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Lunca-Popa P, Botsoa J, Bahri M, Crêpellière J, Desgardin P, Audinot JN, Wirtz T, Arl D, Ersen O, Barthe MF, Lenoble D. Tuneable interplay between atomistic defects morphology and electrical properties of transparent p-type highly conductive off-stoichiometric Cu-Cr-O delafossite thin films. Sci Rep 2020; 10:1416. [PMID: 31996739 PMCID: PMC6989665 DOI: 10.1038/s41598-020-58312-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 12/19/2019] [Indexed: 11/17/2022] Open
Abstract
Off-stoichiometric copper chromium delafossites demonstrate the highest values of electric conductivity among the p-type transparent conducting oxides. Morphological and structural changes in Cu0.66Cr1.33O2 upon annealing processes are investigated. Chained copper vacancies were previously suggested as source of the high levels of doping in this material. High resolution Helium Ion Microscopy, Secondary Ion Mass Spectrometry and Transmission Electron Microscopy reveal a significant rearrangement of copper and chromium after the thermal treatments. Furthermore, Positron Annihilation Spectroscopy evidences the presence of vacancy defects within the delafossite layers which can be assigned to the Cu vacancy chains whose concentration decreases during the thermal process. These findings further confirm these chained vacancies as source of the p-type doping and suggest that the changes in electrical conductivities within the off-stoichiometric copper based delafossites are triggered by elemental rearrangements.
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Affiliation(s)
- Petru Lunca-Popa
- Material Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST), 41, rue de Brill, Belvaux, L-4422, Luxembourg.
| | - Jacques Botsoa
- Conditions Extrêmes et Matériaux: Haute température et Irradiation (CEMHTI) CNRS UPR 3079 - Site Cyclotron, 3A rue de la Férollerie, Orléans cedex 2, 45071, France
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS - Université de Strasbourg, 23 rue du Loess, Strasbourg Cedex 2, 67034, France
| | - Jonathan Crêpellière
- Material Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST), 41, rue de Brill, Belvaux, L-4422, Luxembourg
| | - Pierre Desgardin
- Conditions Extrêmes et Matériaux: Haute température et Irradiation (CEMHTI) CNRS UPR 3079 - Site Cyclotron, 3A rue de la Férollerie, Orléans cedex 2, 45071, France
| | - Jean-Nicolas Audinot
- Material Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST), 41, rue de Brill, Belvaux, L-4422, Luxembourg
| | - Tom Wirtz
- Material Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST), 41, rue de Brill, Belvaux, L-4422, Luxembourg
| | - Didier Arl
- Material Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST), 41, rue de Brill, Belvaux, L-4422, Luxembourg
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS - Université de Strasbourg, 23 rue du Loess, Strasbourg Cedex 2, 67034, France
| | - Marie-France Barthe
- Conditions Extrêmes et Matériaux: Haute température et Irradiation (CEMHTI) CNRS UPR 3079 - Site Cyclotron, 3A rue de la Férollerie, Orléans cedex 2, 45071, France
| | - Damien Lenoble
- Material Research and Technology Department (MRT), Luxembourg Institute of Science and Technology (LIST), 41, rue de Brill, Belvaux, L-4422, Luxembourg
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Staerz A, Bahri M, Geyik U, Brinkmann H, Weimar U, Ersen O, Barsan N. Direct Microscopic Proof of the Fermi Level Pinning Gas-Sensing Mechanism: The Case of Platinum-Loaded WO 3. J Phys Chem Lett 2020; 11:166-171. [PMID: 31834997 DOI: 10.1021/acs.jpclett.9b03114] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is widely known that the sensing characteristics of metal oxides are drastically changed through noble metal oxide surface additives. Using operando infrared spectroscopy it was identified that the Fermi level pinning mechanism dominates the sensor response of platinum-loaded WO3. Spectroscopy, however, provides information about the sample only on average. Traditional microscopy offers structural information but is typically done in vacuum and on unheated sensors, very different than the operation conditions of metal oxide gas sensors. Here, state-of-the-art in situ scanning transmission electron microscopy offers spatially resolved information on heated samples at atmospheric pressure in varying gas atmospheres. As a result it was possible to directly couple microscopically observed structural changes in the surface noble metal nanoclusters with IR spectra and sensor responses. On the basis of the findings, the dominant Fermi level pinning mechanism could be validated. The presented work demonstrates the benefits of coupling in situ microscopy with operando spectroscopy in order to elucidate the sensing mechanism of metal oxides.
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Affiliation(s)
- Anna Staerz
- Institute of Physical and Theoretical Chemistry (IPTC) , University of Tuebingen , Auf der Morgenstelle 15 , D-72076 Tuebingen , Germany
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) , UMR 7504 CNRS-Université de Strasbourg, 23 rue du Lœss , F-67034 Strasbourg cedex 2, France
| | - Ugur Geyik
- Institute of Physical and Theoretical Chemistry (IPTC) , University of Tuebingen , Auf der Morgenstelle 15 , D-72076 Tuebingen , Germany
| | - Helena Brinkmann
- Institute of Physical and Theoretical Chemistry (IPTC) , University of Tuebingen , Auf der Morgenstelle 15 , D-72076 Tuebingen , Germany
| | - Udo Weimar
- Institute of Physical and Theoretical Chemistry (IPTC) , University of Tuebingen , Auf der Morgenstelle 15 , D-72076 Tuebingen , Germany
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) , UMR 7504 CNRS-Université de Strasbourg, 23 rue du Lœss , F-67034 Strasbourg cedex 2, France
| | - Nicolae Barsan
- Institute of Physical and Theoretical Chemistry (IPTC) , University of Tuebingen , Auf der Morgenstelle 15 , D-72076 Tuebingen , Germany
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Sandu G, Avila Osses J, Luciano M, Caina D, Stopin A, Bonifazi D, Gohy JF, Silhanek A, Florea I, Bahri M, Ersen O, Leclère P, Gabriele S, Vlad A, Melinte S. Kinked Silicon Nanowires: Superstructures by Metal-Assisted Chemical Etching. Nano Lett 2019; 19:7681-7690. [PMID: 31593477 DOI: 10.1021/acs.nanolett.9b02568] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report on metal-assisted chemical etching of Si for the synthesis of mechanically stable, hybrid crystallographic orientation Si superstructures with high aspect ratio, above 200. This method sustains high etching rates and facilitates reproducible results. The protocol enables the control of the number, angle, and location of the kinks via successive etch-quench sequences. We analyzed relevant Au mask catalyst features to systematically assess their impact on a wide spectrum of etched morphologies that can be easily attained and customized by fine-tuning of the critical etching parameters. For instance, the designed kinked Si nanowires can be incorporated in biological cells without affecting their viability. An accessible numerical model is provided to explain the etch profiles and the physicochemical events at the Si/Au-electrolyte interface and offers guidelines for the development of finite-element modeling of metal-assisted Si chemical etching.
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Affiliation(s)
- Georgiana Sandu
- Institute of Information and Communication Technologies, Electronics and Applied Mathematics , Université catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
| | - Jonathan Avila Osses
- Institute of Information and Communication Technologies, Electronics and Applied Mathematics , Université catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
| | - Marine Luciano
- Interface and Complex Fluids Laboratory , Université de Mons , 7000 Mons , Belgium
| | - Darwin Caina
- Institute of Information and Communication Technologies, Electronics and Applied Mathematics , Université catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
- Facultad de Ingeniería, Ciencias Físicas y Matemática , Universidad Central del Ecuador , 170521 Quito , Ecuador
| | - Antoine Stopin
- School of Chemistry , Cardiff University , Main Building, Park Place, Cardiff CF10 3AT , United Kingdom
| | - Davide Bonifazi
- School of Chemistry , Cardiff University , Main Building, Park Place, Cardiff CF10 3AT , United Kingdom
| | - Jean-François Gohy
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
| | - Alejandro Silhanek
- Experimental Physics of Nanostructured Materials, Q-MAT, CESAM , Université de Liège , B-4000 Sart Tilman , Belgium
| | - Ileana Florea
- Laboratoire de Physique des Interfaces et des Couches Minces , Ecole Polytechnique , 91128 Palaiseau , France
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg , UMR 7504 CNRS - Université de Strasbourg , 67087 Strasbourg , France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg , UMR 7504 CNRS - Université de Strasbourg , 67087 Strasbourg , France
| | - Philippe Leclère
- Laboratory for Chemistry of Novel Materials, Center for Innovation and Research in Materials and Polymers , Université de Mons , 7000 Mons , Belgium
| | - Sylvain Gabriele
- Interface and Complex Fluids Laboratory , Université de Mons , 7000 Mons , Belgium
| | - Alexandru Vlad
- Institute of Condensed Matter and Nanosciences , Université catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
| | - Sorin Melinte
- Institute of Information and Communication Technologies, Electronics and Applied Mathematics , Université catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
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Zhou A, Ping Wang Y, Cornet C, Léger Y, Pédesseau L, Favre-Nicolin V, Chahine GA, Schülli TU, Eymery J, Bahri M, Largeau L, Patriarche G, Durand O, Létoublon A. A study of the strain distribution by scanning X-ray diffraction on GaP/Si for III–V monolithic integration on silicon. J Appl Crystallogr 2019. [DOI: 10.1107/s1600576719008537] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
A synchrotron-based scanning X-ray diffraction study on a GaP/Si pseudo-substrate is reported, within the context of the monolithic integration of photonics on silicon. Two-dimensional real-space mappings of local lattice tilt and in-plane strain from the scattering spot distributions are measured on a 200 nm partially relaxed GaP layer grown epitaxially on an Si(001) substrate, using an advanced sub-micrometre X-ray diffraction microscopy technique (K-Map). Cross-hatch-like patterns are observed in both the local tilt mappings and the in-plane strain mappings. The origin of the in-plane local strain variation is proposed to be a result of misfit dislocations, according to a comparison between in-plane strain mappings and transmission electron microscopy observations. Finally, the relationship between the in-plane strain and the free surface roughness is also discussed using a statistical method.
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Biesuz M, Bettotti P, Signorini S, Bortolotti M, Campostrini R, Bahri M, Ersen O, Speranza G, Lale A, Bernard S, Sorarù GD. First synthesis of silicon nanocrystals in amorphous silicon nitride from a preceramic polymer. Nanotechnology 2019; 30:255601. [PMID: 30836334 DOI: 10.1088/1361-6528/ab0cc8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report the first synthesis of silicon nanocrystals embedded in a silicon nitride matrix through a direct pyrolysis of a preceramic polymer (perhydropolysilazane). Structural analysis carried out by XRD, XPS, Raman and TEM reveals the formation of silicon quantum dots and correlates the microstructures with the annealing temperature. The photoluminescence of the nanocomposites was investigated by both linear and nonlinear measurements. Furthermore we demonstrate an enhanced chemical resistance of the nitride matrix, compared to the typical oxide one, in both strongly acidic and basic environments. The proposed synthesis via polymer pyrolysis is a striking innovation potentially allowing a mass-scale production nitride embedded Si nanocrystals.
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Affiliation(s)
- M Biesuz
- University of Trento, Department of Industrial Engineering, Via Sommarive 9, I-38123 Trento, Italy
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Niu F, Xie S, Bahri M, Ersen O, Yan Z, Kusema BT, Pera-Titus M, Khodakov AY, Ordomsky VV. Catalyst Deactivation for Enhancement of Selectivity in Alcohols Amination to Primary Amines. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00864] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Feng Niu
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
- E2P2L, UMI 3464 CNRS-Solvay, 3966 Jin Du Rd., 201108 Shanghai, China
| | - Shaohua Xie
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
| | - Mounib Bahri
- IPCMS-UMR 7504 CNRS, Université de Strasbourg, 23 rue du Loess, BP 43-67034 Strasbourg Cedex 2, France
| | - Ovidiu Ersen
- IPCMS-UMR 7504 CNRS, Université de Strasbourg, 23 rue du Loess, BP 43-67034 Strasbourg Cedex 2, France
| | - Zhen Yan
- E2P2L, UMI 3464 CNRS-Solvay, 3966 Jin Du Rd., 201108 Shanghai, China
| | - Bright T. Kusema
- E2P2L, UMI 3464 CNRS-Solvay, 3966 Jin Du Rd., 201108 Shanghai, China
| | - Marc Pera-Titus
- E2P2L, UMI 3464 CNRS-Solvay, 3966 Jin Du Rd., 201108 Shanghai, China
| | - Andrei Y. Khodakov
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France
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Boudaouara O, Charfi S, Bahri M, Daoud J, Boudawara MZ, Gouiaa N, Sellami Boudawara T. Pediatric high grade gliomas: Clinico-pathological profile, therapeutic approaches and factors affecting overall survival. Neurochirurgie 2019; 65:63-68. [PMID: 30922839 DOI: 10.1016/j.neuchi.2019.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 01/19/2019] [Accepted: 03/09/2019] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Pediatric high grade gliomas are rare tumors of the central nervous system. Treatment is multidisciplinary, comprising surgical excision followed by radiotherapy and/or chemotherapy. OBJECTIVES describe these tumors' characteristics as seen in our institution, and identify factors associated with better overall survival. PATIENTS AND METHODS We conducted a retrospective study of 30 cases of pediatric high grade glioma treated consecutively in our institution over a 20-year period. Brainstem tumors and patients aged more than 22years were excluded. Univariate analysis was conducted to determine factors associated with better overall survival. RESULTS The series comprised 30 pediatric high grade gliomas: 27 glioblastomas and 3 anaplastic astrocytomas. The sex ratio was 1.7. Mean age was 13years. Tumors were mainly located in the cerebral hemispheres (63.3%). Median tumor size was 5cm. Glioblastomas were subdivided into 26 cases of classical subtype (96.3%) and 1 case of epithelioid subtype (3.7%). Surgical strategy consisted in tumor resection in 24 cases (80%). Twenty-one patients (70%) received postoperative radiotherapy. Therapeutic response at end of treatment was complete in 7 cases (23.3%). Postoperative radiation therapy and complete treatment response were significantly associated with improved overall survival in all high grade gliomas and also specifically in glioblastomas (P<0.001 and P=0.005, respectively). CONCLUSION Our results suggest that postoperative radiotherapy and complete treatment response are predictive factors for better overall survival in pediatric high grade glioma.
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Affiliation(s)
- O Boudaouara
- Laboratoire d'anatomie et de cytologie pathologique, CHU Habib Bourguiba, route Aïn km 0.5, 3029 Sfax, Tunisia.
| | - S Charfi
- Laboratoire d'anatomie et de cytologie pathologique, CHU Habib Bourguiba, route Aïn km 0.5, 3029 Sfax, Tunisia
| | - M Bahri
- Service de radiothérapie, CHU Habib Bourguiba, 3029 Sfax, Tunisia
| | - J Daoud
- Service de radiothérapie, CHU Habib Bourguiba, 3029 Sfax, Tunisia
| | - M Z Boudawara
- Service de neurochirurgie, CHU Habib Bourguiba, 3029 Sfax, Tunisia
| | - N Gouiaa
- Laboratoire d'anatomie et de cytologie pathologique, CHU Habib Bourguiba, route Aïn km 0.5, 3029 Sfax, Tunisia
| | - T Sellami Boudawara
- Laboratoire d'anatomie et de cytologie pathologique, CHU Habib Bourguiba, route Aïn km 0.5, 3029 Sfax, Tunisia
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Aarab J, Abbess I, Abdalla F, Abdelaziz Z, Abdelfattah S, Abdelli I, Abdelmajid K, Abdelsselem Z, Abdelwahed N, Abdessayed N, Abid B, Abid K, Abidi R, Abudabbous A, Abujanah S, Aburwais A, Acacha E, Acharfi N, Affes N, Aftis R, Ahalli I, Aid M, Aissaoui D, Alaoui A, Alaoui M, Albatran S, Mamdouh A, Alkikkli R, Allam A, Aloulou S, Alqawi O, Alragig MA, Alsharksi A, Amaadour KOL, Amaadour L, Ameziane N, Ammari A, Ammour H, Amrane R, Annad N, Aouati E, Aouichat S, Aouragh S, Arifi S, Astra M, Atassi M, Ati N, Atoui K, Atreche L, Ayachi S, Ayadi I, Ayadi MA, Ayadi M, Ayari J, Ayed H, Ayed K, Ayedi H, Ayedi I, Azegrar M, Azzouz H, Babdalla F, Bachiri R, Bachiri Z, Baghdad M, Bahloul R, Bahouli A, Bahri M, Baississ I, Bakkali H, Balti M, Baraket O, Bargaoui H, Batti R, Bedioui A, Begag R, Behourah Z, Belaid I, Belaïd A, Ben Abdallah A, Ben Abdallah I, Ben Ahmed S, Ben Ahmed T, Ben Azaiz M, Ben Chehida MA, Ben Fatma L, Ben Ghachem D, Ben Ghachem T, Ben Hassouna J, Ben Hmida S, Ben Nasr S, Ben Nejima D, Ben Rahal K, Ben Rejeb M, Ben Rhouma S, Ben Safta I, Ben Salem A, Ben Zargouna Y, Benabdallah I, Benabdella H, Benabdessalem MZ, Benahmed K, Benahmed S, Benameur H, Benasr S, Benbrahim F, Benbrahim W, Benbrahim Z, Benchehida M, Bencheikh Y, Bendhiab T, Benfatma L, Bengueddach A, Benhami M, Benhassouna J, Benhbib W, Benjaafar N, Benkali R, Benkridis W, Benlaloui A, Benmaitig M, Benmansour A, Benmouhoub M, Benna F, Benna H, Benna M, Benna M, Bennabdellah H, Benrahal K, Bensafta I, Bensalah H, Bensalem A, Bensaud M, Benslama R, Benyoub M, Benzid K, Bergaoui H, Beroual M, Berrad S, Berrazaga Y, Bezzaz Z, Bhiri H, Bibi M, Binous MY, Blel A, Boder JM, Bouaouina N, Bouaziz H, Bouchoucha S, Boudawara T, Boudawara Z, Bouderbala A, Bouhali R, Bouhani M, Boujarnija R, Boujelben S, Boujelbene N, Boukerzaza I, Boukhari H, Boulfoul W, Boulma R, Boumansour N, Bouned A, Bounedjar A, Bouraoui I, Bouraoui S, Bourigua R, Bourmech M, Bousaffa H, Bousahba A, Bousrih C, Boussarsar A, Boussen H, Boutayeb S, Bouzaidi K, Bouzaiene F, Bouzaiene H, Bouzerzour Z, Bouzid K, Bouzid N, Bouzidi D, Bouzidi W, Bouzouita A, Brahimi S, Brahmia A, Buhmeida A, Chaaben K, Chaabouni H, Chaabouni M, Chaabène K, Chaari H, Chaari I, Chaari M, Chabchoub I, Chabeene K, Chaker K, Chakroun M, Charfi M, Charfi S, Chargui R, Charles M, Chebil M, Cheikchouk K, Chelly B, Chelly I, Cheraiet N, Cherif A, Cherif M, Cherifi A, Chikhrouhou T, Chikouche A, Chirouf A, Chraiet N, Collan Y, Cui Z, Dabbebi H, Daldoul A, Damouche I, Daoud H, Daoud N, Daoued J, Darif K, Darwish DO, Derbouz Z, Derouiche A, Dhibe TT, Dhibet T, Djallaoui A, Djami N, Djebbes K, Djedi H, Djeghim S, Djellali L, Djellaoui A, Djilat K, Djouabi R, Doumbia H, Drah M, Dridi M, Hsairi M, Elabbassi S, Elallia F, Elati Z, Elattassi M, Elbenna H, Elfagieh MA, Elfaitori O, Elfannas H, Elghali A, Elghali MA, Elgonti S, Elhadj OE, Elhazzaz R, Elkacemi H, Elkinany K, Elkissi Y, Elloumi F, Elmaalel O, Elmajjaou IS, Elmajjaoui S, Elmhabrech H, Elmrabet F, Elsaghayer WA, Elzagheid A, Emaetig F, Erraichi H, Essid M, Ewshah N, Ezzairi F, Faleh R, Fallah S, Farag AL, Farhat L, Fehri R, Feki J, Fendri S, Fendri S, Fessi Z, Filali T, Fissah A, Fourati M, Fourati N, Frikha M, Fuchs CS, Gabssi A, Gachi F, Gadria S, Gammoudi A, Ganzoui I, Gargoura A, Ghaddabb I, Gharbi I, Gharbi M, Ghazouani E, Gheriani N, Ghorbel A, Ghorbel L, Ghozi A, Ghrissi R, Gouader A, Goucha A, Guebsi A, Guellil I, Guermazi F, Guesmi S, Guetari W, Habak N, Haddad A, Haddad S, Haddaoui A, Hadef I, Hader AF, Hadiji A, Hadjarab F, Hadoussa M, Hadoussa N, Hafsa C, Hafsia M, Hajji A, Hajmansour M, Hamdi S, Hamici Z, Hamida S, Hamila F, Hamissa S, Hammouda B, Haouet S, Harhira I, Haroun A, Hassouni K, Hdiji A, Hechiche M, Hejjane L, Hellal C, Henni M, Herbegue K, Hichami L, Hikem M, Hmad A, Hmida L, Hmissa S, Hochlaf M, Houas A, Houhani M, Huwidi A, Ian C, Ibrahim BN, Ibrahim NY, Idir H, Issaoui D, Itaimi A, Izem AE, Jaidane O, Jamel D, Jamous H, Jarrar M, Jarrar MS, Jarray S, Jebsi M, Jmal H, Juwid A, Kaabia O, Kablouti A, Kacem I, Kacem K, Kaid MY, Kallel M, Kallel R, Kammoun H, Kari S, Karrit S, Kchir H, Kchir N, Kebdani T, Kechad N, Kehili H, Kerboua E, Keskes H, Kessi NN, Khababa N, Khaldi H, Khanfir A, Khater B, Khelif A, Khemiri S, Khennouf K, Khouni H, Khrouf S, Kmira Z, Kochbati L, Korbi A, Kouadri N, Kouhen F, Krarti M, Handoussa M, Hsu Y, Laakom O, Laato M, Labidi S, Lahlali F, Lahmidi A, Lalaoui A, Lamia N, Lamri A, Letaief F, Letaief MR, Aldehmani M, Rafael A, Liepa AM, Limaiem F, Limam K, Loughlimi H, Ltaief F, Maamouri N, Mabrouk M, Madouri R, Mahjoub N, Mahjoubi Z, Mahrsi M, Makrem H, Mallek W, Manitta M, Mansoura L, Mansouri H, Maoua M, Maoui W, Marouene C, Marzouk K, Masmoudi S, May F, Meddeb I, Meddeb K, Meddour S, Medhioub F, Mejri N, Melizi MR, Mellas N, Melliti R, Melzi A, Merair N, Merrouki FZ, Mersali C, Messalbi O, Messaoudi L, Messioud S, Messoudi K, Mestiri S, Mezlini A, Mezlini A, Mghirbi F, Mhabrech H, Mhiri A, Midoun N, Milud R, Missaoui B, Mnasser A, Mnejja W, Mokni M, Mokrani A, Mokrani M, Moujahed R, Moukasse Y, Mouzount A, Mrad K, Mraidha MH, Mrizak N, Mzali R, Mzid Y, M'ghirbi F, Nakhli A, Nasr C, Nasri S, Noubigh G, Nouha D, Nouia L, Nouira Y, Noureddine A, Nouri O, Ohtsu A, Ouahbi H, Oualla K, Ouanes Y, Ouaz H, Ouikene A, Ouldbessi N, Parker I, Pyrhonen S, Rachdi H, Rahal K, Rahal K, Rahoui M, Raies H, Rameh S, Reguieg K, Rejab H, Rejiba R, Rhim MS, Riahi S, Rouimel N, Saad Saoud N, Saadi K, Saadi M, Sadou A, Saguem I, Sahnoun T, Sahnoune H, Sakhri S, Sallemi A, Sassi A, Sbika W, Sedkaoui C, Sefiane S, Sellami A, Seppo P, Sfaoua H, Sghaier S, Shagan A, Siala W, Slim I, Slimene M, Soltani S, Souilah S, Souissi M, Sriha Badreddine B, Swaisi Y, Taibi A, Taktak T, Talbi G, Talha SW, Talima SM, Tbessi S, Tebani N, Tebra S, Tebramrad S, Telaijia D, Tenni A, Tolba A, Topov Y, Touil K, Toumi N, Toumi W, Tounsi N, Trigui A, Trigui R, Triki W, Walha M, Werda I, Yacoub H, Yahyaoui Y, Yaich A, Yaici R, Yamouni M, Yeddes I, Yekrou D, Yousfi M, Yousfi N, Youssfi MA, Zaabar L, Zaied S, Zaim I, Zakhama W, Zayed S, Zehani A, Zemni I, Zenzri Y, Zeraoula S, Zouiten O, Zoukar O, Zrafi W, Zribi A, Zubia N. Poster abstracts of the 18th Pan Arab Cancer Congress. TUNISIA. April 19-21, 2018. Tunis Med 2018; 96:177-182. [PMID: 30430520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 09/28/2022]
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Gu B, Bahri M, Ersen O, Khodakov A, Ordomsky VV. Self-Regeneration of Cobalt and Nickel Catalysts Promoted with Bismuth for Non-deactivating Performance in Carbon Monoxide Hydrogenation. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03991] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bang Gu
- CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Université de Lille, F-59000 Lille, France
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS - Université de Strasbourg, 23 Rue du Loess, F-67034 Strasbourg Cedex 2, France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS - Université de Strasbourg, 23 Rue du Loess, F-67034 Strasbourg Cedex 2, France
| | - Andrei Khodakov
- CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Université de Lille, F-59000 Lille, France
| | - Vitaly V. Ordomsky
- CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, Université de Lille, F-59000 Lille, France
- E2P2L - UMI 3464 CNRS-Solvay, 3966 Jin Du Road, Shanghai 201108, China
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Baaziz W, Bahri M, Gay AS, Chaumonnot A, Uzio D, Valette S, Hirlimann C, Ersen O. Thermal behavior of Pd@SiO 2 nanostructures in various gas environments: a combined 3D and in situ TEM approach. Nanoscale 2018; 10:20178-20188. [PMID: 30362491 DOI: 10.1039/c8nr06951d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The thermal stability of core-shell Pd@SiO2 nanostructures was for the first time monitored by using in situ Environmental Transmission Electron Microscopy (E-TEM) at atmospheric pressure coupled with Electron Tomography (ET) on the same particles. The core Pd particles, with octahedral or icosahedral original shapes, were followed during thermal heating under gas at atmospheric pressure. In the first step, their morphology/faceting evolution was investigated in a reductive H2 environment up to 400 °C by electron tomography performed on the same particles before and after the in situ treatment. As a result, we observed the formation of small Pd particles inside the silica shell due to the thermally activated diffusion from the core particle. A strong dependence of the shape and faceting transformations on the initial structure of the particles was evidenced. The octahedral monocrystalline NPs were found to be less stable than the icosahedral ones; in the first case, the Pd diffusion from the core towards the silica external surface led to a progressive decrease of the particle size. The icosahedral polycrystalline NPs do not exhibit a morphology/faceting change, as in this case the atom diffusion within the particle is favored against diffusion towards the silica shell, due to a high amount of crystallographic defects in the particles. In the second part, the Pd@SiO2 NPs behavior at high temperatures (up to 1000 °C) was investigated under reductive or oxidative conditions; it was found to be strongly related to the thermal evolution of the silica shell: (1) under H2, the silica is densified and loses its porous structure leading to a final state with Pd core NPs encapsulated in the shell; (2) under air, the silica porosity is maintained and the increase of the temperature leads to an enhancement of the diffusion mechanism from the core towards the external surface of the silica; as a result, at 850 °C all the Pd atoms are expelled outside the silica shell.
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Affiliation(s)
- Walid Baaziz
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504, CNRS - Université de Strasbourg, 23 rue du Lœss BP 43, 67034 Strasbourg cedex 2, France.
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Dembélé K, Bahri M, Melinte G, Hirlimann C, Berliet A, Maury S, Gay AS, Ersen O. Cover Feature: Insight by In Situ Gas Electron Microscopy on the Thermal Behaviour and Surface Reactivity of Cobalt Nanoparticles (ChemCatChem 18/2018). ChemCatChem 2018. [DOI: 10.1002/cctc.201801445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kassiogé Dembélé
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
| | - Georgian Melinte
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
| | - Charles Hirlimann
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
| | - Adrien Berliet
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Sylvie Maury
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Anne-Sophie Gay
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
- University of Strasbourg; Institute for Advanced Studies (USIAS); 5 allée du Général Rouvillois Strasbourg 67083 France
- Institut Universitaire de France (IUF); 1 rue Descartes Paris 75231 France
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Bahri M, Dembélé K, Sassoye C, Debecker DP, Moldovan S, Gay AS, Hirlimann C, Sanchez C, Ersen O. In situ insight into the unconventional ruthenium catalyzed growth of carbon nanostructures. Nanoscale 2018; 10:14957-14965. [PMID: 30047972 DOI: 10.1039/c8nr01227j] [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] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We report on the in situ analysis of the growth process of carbon nanostructures catalyzed by Ru nanoparticles using syngas, a mixture of hydrogen and CO, as the carbon source at a medium temperature (500 °C). The structural modifications of the dual nanotube/nanoparticle system and the general dynamics of the involved processes have been directly followed during the growth, in real time and at the atomic scale, by transmission electron microscopy in an environmental gas cell at atmospheric pressure. After a reduction step under hydrogen and syngas, the particles became very active for the carbon growth. The growth rate is independent of the particle size which mainly influences the nanotube wall thickness. Other subtle information on the general behavior of the system has been obtained, as for instance the fact that the regular changes in the direction of the particle originate generally from the particle shape fluctuation. The main result is the evidence of a new growth mode in relation to the presence and the high instability of the ruthenium carbide phase which acts as a carbon reservoir. For the first time, a relaxation oscillation of the growth rate has been observed and correlated with the metal-carbide structural transition at the particle sub-surface.
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Affiliation(s)
- M Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS - Université de Strasbourg, 23 Rue du Lœss, F-67034 Strasbourg Cedex 2, France.
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Dembélé K, Bahri M, Melinte G, Hirlimann C, Berliet A, Maury S, Gay AS, Ersen O. Insight by In Situ Gas Electron Microscopy on the Thermal Behaviour and Surface Reactivity of Cobalt Nanoparticles. ChemCatChem 2018. [DOI: 10.1002/cctc.201800854] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kassiogé Dembélé
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Mounib Bahri
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
| | - Georgian Melinte
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
| | - Charles Hirlimann
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
| | - Adrien Berliet
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Sylvie Maury
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Anne-Sophie Gay
- IFP EnergiesNouvelles; Rond-point de l'8 Changeur de Solaize 69360 France
| | - Ovidiu Ersen
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS); 23 rue du Loess Strasbourg 67034 France
- University of Strasbourg; Institute for Advanced Studies (USIAS); 5 allée du Général Rouvillois Strasbourg 67083 France
- Institut Universitaire de France (IUF); 1 rue Descartes Paris 75231 France
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Lallemand F, Leroi N, Bahri M, Balteau E, Noël A, Coucke P, Plenevaux A, Martinive P. EP-2331: Tumor microenvironment modifications recorded with IVIM perfusion analysis after radiotherapy. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32640-9] [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: 11/28/2022]
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41
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Lallemand F, Leroi N, Bahri M, Balteau E, Noël A, Coucke P, Plenevaux A, Martinive P. PO-1036: Brain modifications after stereotactic radiotherapy recorded by Functional MRI. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31346-x] [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: 10/14/2022]
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Annen J, Heine L, Ziegler E, Frasso G, Bahri M, Di Perri C, Stender J, Martial C, Wannez S, D'ostilio K, Amico E, Antonopoulos G, Bernard C, Tshibanda F, Hustinx R, Laureys S. Function-structure connectivity in patients with severe brain injury as measured by MRI-DWI and FDG-PET. Hum Brain Mapp 2018; 37:3707-3720. [PMID: 27273334 DOI: 10.1002/hbm.23269] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 04/12/2016] [Accepted: 05/16/2016] [Indexed: 02/05/2023] Open
Abstract
A vast body of literature exists showing functional and structural dysfunction within the brains of patients with disorders of consciousness. However, the function (fluorodeoxyglucose FDG-PET metabolism)-structure (MRI-diffusion-weighted images; DWI) relationship and how it is affected in severely brain injured patients remains ill-defined. FDG-PET and MRI-DWI in 25 severely brain injured patients (19 Disorders of Consciousness of which 7 unresponsive wakefulness syndrome, 12 minimally conscious; 6 emergence from minimally conscious state) and 25 healthy control subjects were acquired here. Default mode network (DMN) function-structure connectivity was assessed by fractional anisotropy (FA) and metabolic standardized uptake value (SUV). As expected, a profound decline in regional metabolism and white matter integrity was found in patients as compared with healthy subjects. Furthermore, a function-structure relationship was present in brain-damaged patients between functional metabolism of inferior-parietal, precuneus, and frontal regions and structural integrity of the frontal-inferiorparietal, precuneus-inferiorparietal, thalamo-inferioparietal, and thalamofrontal tracts. When focusing on patients, a stronger relationship between structural integrity of thalamo-inferiorparietal tracts and thalamic metabolism in patients who have emerged from the minimally conscious state as compared with patients with disorders of consciousness was found. The latter finding was in line with the mesocircuit hypothesis for the emergence of consciousness. The findings showed a positive function-structure relationship within most regions of the DMN. Hum Brain Mapp 37:3707-3720, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- J Annen
- Cyclotron Research Centre, University of Liège, Liège, Belgium.,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium.,University Hospital of Liège, Liège, Belgium
| | - L Heine
- Cyclotron Research Centre, University of Liège, Liège, Belgium.,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium.,University Hospital of Liège, Liège, Belgium
| | - E Ziegler
- Cyclotron Research Centre, University of Liège, Liège, Belgium
| | - G Frasso
- Faculty of Social Sciences, Quantitative Methods for Social Sciences, University of Liège, Liège, Belgium
| | - M Bahri
- Cyclotron Research Centre, University of Liège, Liège, Belgium
| | - C Di Perri
- Cyclotron Research Centre, University of Liège, Liège, Belgium.,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium
| | - J Stender
- University of Copenhagen, Copenhagen, Denmark
| | - C Martial
- Cyclotron Research Centre, University of Liège, Liège, Belgium.,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium.,University Hospital of Liège, Liège, Belgium
| | - S Wannez
- Cyclotron Research Centre, University of Liège, Liège, Belgium.,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium.,University Hospital of Liège, Liège, Belgium
| | - K D'ostilio
- Headache Research Unit, University of Liège, Liège, Belgium
| | - E Amico
- Cyclotron Research Centre, University of Liège, Liège, Belgium.,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium
| | - G Antonopoulos
- Cyclotron Research Centre, University of Liège, Liège, Belgium.,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium
| | - C Bernard
- University Hospital of Liège, Liège, Belgium
| | - F Tshibanda
- University Hospital of Liège, Liège, Belgium
| | - R Hustinx
- University Hospital of Liège, Liège, Belgium
| | - S Laureys
- Cyclotron Research Centre, University of Liège, Liège, Belgium. .,Coma Science Group, GIGA Consciousness, University of Liège, Liège, Belgium. .,University Hospital of Liège, Liège, Belgium.
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Faraj S, Bahri M, Fougeray S, El Roz A, Fleurence J, Véziers J, Leclair MD, Thébaud E, Paris F, Birklé S. Neuroblastoma chemotherapy can be augmented by immunotargeting O-acetyl-GD2 tumor-associated ganglioside. Oncoimmunology 2017; 7:e1373232. [PMID: 29296527 DOI: 10.1080/2162402x.2017.1373232] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 08/25/2017] [Accepted: 08/25/2017] [Indexed: 12/28/2022] Open
Abstract
Despite recent advances in high-risk neuroblastoma therapy, the prognosis for patients remains poor. In addition, many patients suffer from complications related to available therapies that are highly detrimental to their quality of life. New treatment modalities are, thus, urgently needed to further improve the efficacy and reduce the toxicity of existing therapies. Since antibodies specific for O-acetyl GD2 ganglioside display pro-apoptotic activity against neuroblastoma cells, we hypothesized that combination of immunotherapy could enhance tumor efficacy of neuroblastoma chemotherapy. We demonstrate here that combination of anti-O-acetyl GD2 monoclonal antibody 8B6 with topotecan synergistically inhibited neuroblastoma cell proliferation, as shown by the combination index values. Mechanistically, we evidence that mAb 8B6 induced plasma cell membrane lesions, consistent with oncosis. Neuroblastoma tumour cells treated with mAb 8B6 indeed showed an increased uptake of topotecan by the tumor cells and a more profound tumor cell death evidenced by increased caspase-3 activation. We also found that the combination with topotecan plus monoclonal antibody 8B6 showed a more potent anti-tumor efficacy in vivo than either agent alone. Importantly, we used low-doses of topotecan with no noticeable side effect. Our data suggest that chemo-immunotherapy combinations may improve the clinical efficacy and safety profile of current chemotherapeutic modalities of neuroblastoma.
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Affiliation(s)
- S Faraj
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, Loire Atlantique, France.,Service de chirurgie pédiatrique, CHU de Nantes, 38 boulevard Jean Monnet, Nantes, Loire Atlantique, France
| | - M Bahri
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, Loire Atlantique, France
| | - S Fougeray
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, Loire Atlantique, France.,Université de Nantes, UFR des Sciences Pharmaceutiques et Biologiques, 9 rue Bias, Nantes, Loire Atlantique, France
| | - A El Roz
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, Loire Atlantique, France.,Université de Nantes, UFR des Sciences Pharmaceutiques et Biologiques, 9 rue Bias, Nantes, Loire Atlantique, France
| | - J Fleurence
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, Loire Atlantique, France.,Université de Nantes, UFR des Sciences Pharmaceutiques et Biologiques, 9 rue Bias, Nantes, Loire Atlantique, France
| | - J Véziers
- INSERM, UMRS 1229, RMeS "Regenerative Medicine and Skeleton", CHU Nantes, PH4 OTONN, Université de Nantes, UFR Odontologie, SC3M Plateform, UMS INSERM 016 - CNRS 3556, SFR François Bonamy, 1 place Alexis Ricordeau, Nantes, Loire Atlantique, France
| | - M D Leclair
- Service de chirurgie pédiatrique, CHU de Nantes, 38 boulevard Jean Monnet, Nantes, Loire Atlantique, France.,Université de Nantes, UFR de Médecine, 1 rue Gaston Veil, Nantes, Loire Atlantique, France
| | - E Thébaud
- Service d'oncologie pédiatrique, CHU de Nantes, quai Moncousu, Nantes, Loire Atlantique, France
| | - F Paris
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, Loire Atlantique, France
| | - S Birklé
- CRCINA, INSERM, Université d'Angers, Université de Nantes, Nantes, Loire Atlantique, France.,Université de Nantes, UFR des Sciences Pharmaceutiques et Biologiques, 9 rue Bias, Nantes, Loire Atlantique, France
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Bahri M, Jaïdane N, Ben Lakhdar Z, Flament JP. A study of the reactions CH4 + OH
↦ CH3 + H2O and C2H6 + OH ↦ C2H5 + H2O
by ab initio and DFT calculations. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp:1999162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ben Salah H, Bahri M, Dhouib F, Daoud J. Quelle place pour la chimioradiothérapie postopératoire dans la prise en charge thérapeutique des adénocarcinomes de l’estomac et de la jonction œsogastrique ? Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.09.003] [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: 10/20/2022]
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46
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Ben Salah H, Bahri M, Dhouib F, Daoud J. [Role of postoperative chemoradiotherapy in the therapeutic management of adenocarcinomas of the stomach and oesogastric junction]. Cancer Radiother 2016; 20:830-832. [PMID: 27793531 DOI: 10.1016/j.canrad.2016.07.100] [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: 02/29/2016] [Revised: 06/01/2016] [Accepted: 07/07/2016] [Indexed: 12/01/2022]
Abstract
The available data in the literature show that for gastric adenocarcinoma or gastroesophageal junction adenocarcinoma, postoperative chemoradiotherapy improves disease-free survival after surgery with D0 or D1 lymph node dissection (and perhaps D2) as well as in case of positive node or R1 resection. With the publications of perioperative chemotherapy trials, the role of postoperative radiotherapy in the therapeutic arsenal of gastric adenocarcinoma or gastroesophageal junction adenocarcinoma becomes difficult to define. Postoperative radiotherapy is indicated in case of R1 resection.
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Affiliation(s)
- H Ben Salah
- Service de radiothérapie, CHU Habib-Bourguiba, rue Majida-Boulila, 3029 Sfax, Tunisie; Faculté de médecine, université de Sfax, rue Majida-Boulila, 3029 Sfax, Tunisie.
| | - M Bahri
- Service de radiothérapie, CHU Habib-Bourguiba, rue Majida-Boulila, 3029 Sfax, Tunisie; Faculté de médecine, université de Sfax, rue Majida-Boulila, 3029 Sfax, Tunisie
| | - F Dhouib
- Service de radiothérapie, CHU Habib-Bourguiba, rue Majida-Boulila, 3029 Sfax, Tunisie; Faculté de médecine, université de Sfax, rue Majida-Boulila, 3029 Sfax, Tunisie
| | - J Daoud
- Service de radiothérapie, CHU Habib-Bourguiba, rue Majida-Boulila, 3029 Sfax, Tunisie; Faculté de médecine, université de Sfax, rue Majida-Boulila, 3029 Sfax, Tunisie
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Fourati N, Ben Salah H, Sellami N, Rebai N, Bahri M, Mhiri N, Frikha M, Daoud J. Effet hémostatique de la radiothérapie dans la prise en charge des cancers de la vessie. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.08.058] [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: 11/30/2022]
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Bahri M, Hanbli G, Abidi R, Farhat L, Sahnoun T, Salah HB, Daoud J. Dose reçue par le plexus brachial après radiothérapie du cancer du sein : étude de 103 cas. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.08.021] [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: 10/21/2022]
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Ben Salah H, Bourmèche M, Kallel M, Bahri M, Sallemi N, Mzali R, Frikha M, Daoud J. Chimioradiothérapie postopératoire des carcinomes de la vésicule biliaire. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.08.039] [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: 11/27/2022]
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Bahri H, Bahri M, Fernandez-Ramos A. Ab initio investigation of the H2O2+F elementary reaction. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.04.018] [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: 11/29/2022]
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