• Article dans une revue

Theoretical and experimental study of the adsorption of neutral glycine on silica from the gas phase

Claire Lomenech, Gregoire Bery, Dominique Costa, Lorenzo Stievano, Jean-François Lambert

The adsorption of neutral glycine onto amorphous silica was investigated both theoretically and experimentally. DFT calculations were performed at the BLYP-631++G** level using a cluster approach. Several possible configurations involving the formation of H-bonds between glycine and one, two or…

ChemPhysChem, 2005, 6, pp.1061-1070. ⟨hal-00128574⟩

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Experimental clues for detecting biosignatures on Mars

J.-C. Viennet, S. Bernard, Corentin Le Guillou, P. Jacquemot, E. Balan, L. Delbes, B. Rigaud, T. Georgelin, M. Jaber

Forthcoming exploration of Mars aims at identifying fossil biosignatures within ancient clay-rich formations. The subsurface of Mars has mostly acted as a giant freezer for the last 4 Gyr, thereby preserving potential remains of martian life. Yet, volcanism and impactors have periodically triggered…

Geochemical Perspectives Letters, 2019, Geochemical Perspectives Letters, 12, pp.28-33. ⟨10.7185/geochemlet.1931⟩. ⟨hal-02415460⟩

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Sulfamide chemistry applied to the functionalization of self-assembled monolayers on gold surfaces

Loïc Pantaine, Vincent Humblot, Vincent Coeffard, Anne Vallee

Aniline-terminated self-assembled monolayers (SAMs) on gold surfaces have successfully reacted with ArSO₂NHOSO₂Ar (Ar = 4-MeC₆H₄ or 4-FC₆H₄) resulting in…

Beilstein Journal of Organic Chemistry, 2017, 13, pp.648 - 658. ⟨10.3762/bjoc.13.64⟩. ⟨hal-04963512⟩

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In situ photo-electrochemical investigation using surface X-ray diffraction: from ultra-high vacuum to solid/electrolyte interfaces

Axel Wilson, I M Nadeem, H Hussain, X Torrelles, J Imran, D Garai, Robert Lindsay, Gregory Cabailh, J Zegenhagen, G Thornton, C Nicklin

<div><p>A Photo-ElectroChemical DrOplet Cell (PEC-DOC) has been developed for the I07 surface diffraction beamline of Diamond Light Source to investigate solid-liquid interfaces using Surface X-Ray Diffraction (SXRD). PEC-DOC is ultrahigh vacuum (UHV) compatible, and so can be directly…

Journal of Physics: Conference Series, 2025, ⟨10.1088/1742-6596/3010/1/012153⟩. ⟨hal-05099661⟩

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Copper and Nickel Nanoparticles Prepared by Thermal Treatment of Their Respective Cations Confined in Nanopores through High-Pressure Synthesis

Nancy Brodie-Linder, Johnny Deschamps, Marianne Bombled, Nicolas Pasternak, Fabrice Audonnet, Patricia Beaunier, Christiane Alba-Simionesco

A new and simple method for preparing confined copper and nickel nanoparticles by thermal treatment of their respective cations inside Mobil Composition of Matter 41 (MCM–41) hydrophobic nanopores is presented here. Surface modified MCM–41 hydrophobic materials were impregnated by using high-…

Applied Nano, 2021, 2 (3), pp.278-288. ⟨10.3390/applnano2030020⟩. ⟨hal-03351411⟩

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Melanin Polymerization Held in Check: A Composite of Dihydroxyphenylalanine with Zeolite Beta

Meryem Bouchoucha, Frederik Tielens, Fabrice Gaslain, France Costatorro, Sandra Casale, Ana Palcic, Valentin Valtchev, Jean-François Lambert, Maguy Jaber

Journal of Physical Chemistry C, 2015, 119 (16), pp.8736-8747. ⟨10.1021/acs.jpcc.5b01194⟩. ⟨hal-02403166⟩

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Adsorption and self-assembly of bio-organic molecules at model surfaces: A route towards increased complexity

Dominique Costa, Claire-Marie Pradier, Frederik Tielens, Letizia Savio

Understanding the bio-physical chemical interactions at nanostructured biointerfaces and the assembly mechanisms of so-called hybrid nano-composites is nowadays a key issue for nanoscience in view of the many possible applications foreseen. The contribution of surface science in this field is…

Surface Science Reports, 2015, 70 (4), pp.449-553. ⟨10.1016/j.surfrep.2015.10.002⟩. ⟨hal-01275043⟩

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Stability of Binary SAMs Formed by omega-Acid and Alcohol Functionalized Thiol Mixtures

Frederik Tielens, Vincent Humblot, Claire-Marie Pradier, Monica Calatayud, Francesc Illas

A simple model is presented to describe the mixing process of acid- and alcohol-terminated thiol self-assembled monolayers (SAMs) on Au(111). It was found that the low-concentration acid-terminated SAMs are enriched in acid thiol compared with the original solution from which the SAM is made. Due…

Langmuir, 2009, 25 (17), pp.9980-9985. ⟨10.1021/la901127g⟩. ⟨hal-01361365⟩

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Does the S-H Bond Always Break after Adsorption of an Alkylthiol on Au(111)?

Hazar Guesmi, Noelia B. Luque, Elizabeth Santos, Frederik Tielens

The reaction mechanism for the formation of alkyl thiol self-assembled monolayers (SAM) on Au(111) is still not clearly understood. Especially, the role of defects on the chemisorption process is an important goal to be addressed. In this work, different minimum energy reaction paths for R−SH…

Chemistry - A European Journal, 2017, 23 (6), pp.1402-1408. ⟨10.1002/chem.201604574⟩. ⟨hal-01397010⟩

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Insight into the mechanism of action of temporin-SHa, a new broad-spectrum antiparasitic and antibacterial agent

Zahid Raja, Sonia André, Feten Abbassi, Vincent Humblot, Olivier Lequin, Tahar Bouceba, Isabelle Correia, Sandra Casale, Thierry Foulon, Denis Sereno, Bruno Oury, Ali Ladram

Antimicrobial peptides (AMPs) are promising drugs to kill resistant pathogens. In contrast to bacteria, protozoan parasites, such as Leishmania, were little studied. Therefore, the antiparasitic mechanism of AMPs is still unclear. In this study, we sought to get further insight into this mechanism…

PLoS ONE, 2017, 12 (3), pp.e0174024. ⟨10.1371/journal.pone.0174024⟩. ⟨hal-01517346⟩