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Chenevier P.,Laboratoire dElectronique Moleculaire | Mugherli L.,Laboratoire dElectronique Moleculaire | Darbe S.,Laboratoire dElectronique Moleculaire | Darchy L.,Laboratoire dElectronique Moleculaire | And 8 more authors.
Comptes Rendus Chimie | Year: 2013

While hydrogen is often considered as a promising energy vector and an alternative to fossil fuels, the rise of the hydrogen economy is ever and ever postponed. This is mainly due to the high costs of the materials required for the elaboration of fuel cells, these wonderful systems that release the energy contained in the H2 molecule in the form of electrical power. Indeed, scarce and precious platinum is required as a catalyst at both electrodes of fuel cells. A solution may be found in nature with metalloenzymes involved in hydrogen metabolism, called hydrogenases. These natural catalysts can be used directly in biofuel cells or serve as an inspiration to chemists for the elaboration of bio-inspired electrocatalytic materials. © 2012 Académie des sciences.

De Kergommeaux A.,Laboratoire dElectronique Moleculaire | De Kergommeaux A.,DTS | Fiore A.,Laboratoire dElectronique Moleculaire | Faure-Vincent J.,Laboratoire dElectronique Moleculaire | And 4 more authors.
Materials Chemistry and Physics | Year: 2012

All-inorganic 12-nm CuInSe 2 nanocrystals, surface functionalized with metal chalcogenide complex ligands, were prepared via phase transfer ligand exchange in a biphasic (anhydrous hydrazine/hexane) mixture. I-V characteristics of thin films of these nanocrystals showed a four order of magnitude increase in current density as compared to nanocrystals capped with initial oleylamine ligands. © 2012 Elsevier B.V. All rights reserved.

Kergommeaux A.D.,Laboratoire dElectronique Moleculaire | Fiore A.,Laboratoire dElectronique Moleculaire | Faure-Vincent J.,Laboratoire dElectronique Moleculaire | Pron A.,Laboratoire dElectronique Moleculaire | And 2 more authors.
Advances in Natural Sciences: Nanoscience and Nanotechnology | Year: 2013

Thin-film processing of colloidal semiconductor nanocrystals (NCs) is a prerequisite for their use in (opto-)electronic devices. The commonly used spin-coating is highly materials consuming as the overwhelming amount of deposited matter is ejected from the substrate during the spinning process. Also, the well-known dip-coating and drop-casting procedures present disadvantages in terms of the surface roughness and control of the film thickness. We show that the doctor blade technique is an efficient method for preparing nanocrystal films of controlled thickness and low surface roughness. In particular, by optimizing the deposition conditions, smooth and pinhole-free films of 11 nm CuInSe2 NCs have been obtained exhibiting a surface roughness of 13 nm root mean square (rms) for a 350 nm thick film, and less than 4 nm rms for a 75 nm thick film.© 2013 Vietnam Academy of Science & Technology.

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