Laboratoire de réactivité de surface

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  • Article dans une revue

Structure–Activity Relationship in Manganese Perovskite Oxide Nanocrystals from Molten Salts for Efficient Oxygen Reduction Reaction Electrocatalysis

Francisco Gonell, Carlos M Sánchez-Sánchez, Vincent Vivier, Christophe Méthivier, Christel Laberty-Robert, David Portehault

We report a synthesis pathway in molten salts toward ligand-free nanoparticles of the layered perovskite La0.5Sr1.5MnO4 (l-LSMO) and of the pseudocubic perovskite La0.7Sr0.3MnO3 (pc-LSMO). These particles are readily implemented as oxygen reduction reaction (ORR) electrocatalysts in alkaline…

Chemistry of Materials, 2020, 32 (10), pp.4241-4247. ⟨10.1021/acs.chemmater.0c00681⟩. ⟨hal-02767098⟩

  • Communication dans un congrès

On the impedance response of a passive electrode : what is the influence of the double layer capacitance

Oumaïma Gharbi, Mai T.T. Tran, Mark Orazem, Bernard Tribollet, Mireille Turmine, Vincent Vivier

Determination of the effective capacitance of passive films remains a difficult challenge and mostly relies on the assumption the contribution of the double layer can be neglected. Such an approximation is easy to verify a posteriori when data analysis is performed assuming that each of the…

72nd ISE Meeting, ISE, Aug 2021, Jeju Island, South Korea. ⟨hal-04013545⟩

  • Article dans une revue

Synthesis of RNA nucleotides in plausible prebiotic conditions from ab initio computer simulations

Andrea Pérez-Villa, Antonino Marco Saitta, Thomas Georgelin, Jean-François Lambert, François Guyot, Marie-Christine Maurel, Fabio Pietrucci

Understanding the mechanism of spontaneous formation of ribonucleotides under realistic prebiotic conditions is a key open issue of origins-of-life research. In cells, de novo and salvage nucleotide enzymatic synthesis combines 5-phospho-α-d-ribose-1-diphosphate (α-PRPP) and nucleobases.…

Journal of Physical Chemistry Letters, 2018, 9 (17), pp.4981-4987. ⟨10.1021/acs.jpclett.8b02077⟩. ⟨hal-01895482⟩

  • Article dans une revue

Supramolecular Self‐Assembly and Organization of Collagen at Solid/Liquid Interface: Effect of Spheroid‐ and Rod‐Shaped TiO 2 Nanocrystals

Mathieu Beauvais, Thomas Degabriel, Nesrine Aissaoui, Vincent Dupres, Elodie Colaço, Karim El Kirat, Rute F Domingos, Dalil Brouri, Claire‐marie Pradier, Jolanda Spadavecchia, Jessem Landoulsi

The adsorption behavior of collagen on solid surfaces is a process that determines the role of this protein to mediate cell–material interaction. Herein, the mechanism of self‐assembly and organization of collagen on a model substrate is investigated in the presence of TiO2 nanoparticles. In…

Advanced Materials Interfaces, 2019, 6 (14), pp.1900195. ⟨10.1002/admi.201900195⟩. ⟨hal-02391527⟩

  • Article dans une revue

Hollow Gold Nanoshells for Sensitive 2D Plasmonic Sensors

Daoming Sun, Ferdaous Ben Romdhane, Axel Wilson, Michèle Salmain, Souhir Boujday

The interaction of incident light with noble metal nanoparticles engenders a fascinating phenomenon known as localized surface plasmon resonance (LSPR). This results in the presence of single or multiple intense absorption bands in the visible to near-infrared spectral range whose position is…

ACS Applied Nano Materials, 2024, 7 (5), pp.5093-5102. ⟨10.1021/acsanm.3c05872⟩. ⟨hal-04477602⟩

  • Article dans une revue

A straightforward approach to high purity sodium silicide Na4Si4

Yang Song, Isabel Gómez-Recio, Ram Kumar, Cristina Coelho Diogo, Sandra Casale, Isabelle Génois, David Portehault

Sodium silicide Na4Si4 is a reductive and reactive source of silicon highly relevant to designing non-oxidic silicon materials, including clathrates, various silicon allotropes, and metal silicides. Despite the impor-tance of this compound, its production in high amounts and high purity is still a…

Dalton Transactions, 2021, 50 (45), pp.16703-16710. ⟨10.1039/D1DT03203H⟩. ⟨hal-03537395⟩

  • Article dans une revue

Leucine on Silica: A Combined Experimental and Modeling Study of a System Relevant for Origins of Life, and the Role of Water Coadsorption

Hagop Abadian, Pauline Cornette, Dominique Costa, Alberto Mezzetti, Christel Gervais, Jean-François Lambert

Leucine on silica constitutes an interesting system from the point of view of origins of life studies since leucine coadsorbed on SiO2 together with glutamic acid can give rise to rather long linear polypeptides upon activation. It is also an ideal system to test methods of molecular…

Langmuir, 2022, 38 (26), pp.8038-8053. ⟨10.1021/acs.langmuir.2c00841⟩. ⟨hal-03857982⟩

  • Article dans une revue

Production and Characterization of Activated Carbon from Orange Peels by Chemical Activation with Sulfuric Acid

Sami Guiza, Salwa Hajyahia, Franck Launay, Mohamed Bagane

Oranges represent 75% of the total citrus fruits (Guiza in Ecol Eng, 99: 134–140, 2017) throughout the world, and Tunisia is one of the major juice producers. Orange peels could cause a significant disposal problem but they are also valuable biomass wastes (Valdes et al. in Langmuir 18: 2111–2116,…

Recent advances in environmental science from the Euro Mediterranean and surrounding regions, 2018, Advances in Science, Technology & Innovation, pp.959-961. ⟨10.1007/978-3-319-70548-4_278⟩. ⟨hal-04020437⟩

  • Article dans une revue

Crystalline Molybdenum Oxide Thin-Films for Application as Interfacial Layers in Optoelectronic Devices

André Luis Fernandes Cauduro, Roberto dos Reis, Gong Chen, Andreas K. Schmid, Christophe Méthivier, Horst-Günter Rubahn, Léo Bossard-Giannesini, Hervé Cruguel, Nadine Witkowski, Morten Madsen

The ability to control the interfacial properties in metal-oxide thin films through surface defect engineering is vital to fine tune their optoelectronic properties and thus their integration in novel optoelectronic devices. This is exemplified in photovoltaic devices based on organic, inorganic or…

ACS Applied Materials & Interfaces, 2017, 9 (8), pp.7717-7724. ⟨10.1021/acsami.6b14228⟩. ⟨hal-01464322⟩

  • Article dans une revue

NCI : looking at solute/solvent interactions

Robin Chaudret, C. Narth, Raphaël Lugo, Pascal Mougin, Jean-Charles de Hemptinne, Hervé Toulhoat, J. Contreras-García

Understanding solvation interactions is a key problem for many industrial fields: from pharmaceutical to material sciences. From a quantum mechanical viewpoint, two main difficulties arise: firstly, solvation takes place through weak interactions (hydrogen bonds, van der Waals interactions), which…

Electronic Structure, 2021, 3 (3), pp.034006. ⟨10.1088/2516-1075/ac1a62⟩. ⟨hal-03375488⟩