• Article dans une revue

Identification and Distribution of Surface Ions in Low Coordination of CaO Powders with Photoluminescence Spectroscopy

Hugo Petitjean, Jean-Marc Krafft, Michel Che, Helene Lauron-Pernot, Guylene Costentin

Oxide ions in low coordination (O-LC(2-)) Play a major role in adsorption and catalysis properties of CaO powders. They also give specific photoluminescence features that could be used to characterize the distribution of these ions at the molecular level, but up to now, the photoluminescence of…

Journal of Physical Chemistry C, 2011, 115 (3), pp.751-756. ⟨10.1021/jp110193k⟩. ⟨hal-00602946⟩

• Article dans une revue

Immobilization of polyoxometalate hybrid catalysts onto mesoporous silica supports using phenylene diisothiocyanate as a cross-linking agent

Ourania Makrygenni, Dalil Brouri, Anna Proust, Franck Launay, Richard Villanneau

The hybrid derivative of heteropolytungstate bearing two aniline groups, namely (nBu4N)3[NaHPW9O34{As(O)C6H4NH2}2], was post-functionalized in the presence of 1,4-phenylene diisothiocyanate (PDITC). The resulting molecular moiety was characterized by IR, 1H and 31P NMR spectroscopy. In a second…

Microporous and Mesoporous Materials, 2018, 278, pp.314-321. ⟨10.1016/j.micromeso.2018.11.036⟩. ⟨hal-02143825⟩

• Pré-publication, Document de travail

Quantifying Cell Traction Forces at the Individual Fiber Scale in 3D: A Novel Approach Based on Deformable Photopolymerized Fiber Arrays

Pierre Ucla, Joanne Le Chesnais, Henri Ver Hulst, Xingming Ju, Isabel Calvente, Ludovic Leconte, Jean Salamero, Isabelle Bonnet, Catherine Monnot, Hélène Moreau, Jessem Landoulsi, Vincent Semetey, Sylvie Coscoy

The forces exerted by cells upon the fibers of the extracellular matrix play a decisive role in cell motility in development and disease. How the local physical properties of the matrix (such as density, stiffness, orientation) affect cellular forces remains poorly understood. Existing approaches…

2024. ⟨hal-04795582⟩

• Article dans une revue

Preparation of two series of VxSiBeta zeolite catalysts with V centres in framework and extra-framework positions and their application in selective oxidation of methanol

Maciej Trejda, Yannick Millot, Karolina Chalupka, Stanislaw Dzwigaj

Two series of V-containing Beta zeolites have been prepared by contacting of the aqueous NH 4 VO 3 solution with two SiBeta zeolites at pH = 2.5 and 6, respectively. Because of the presence in NH 4 VO 3 solution at pH = 2.5 mainly monomeric VO 2 + ions, vanadium have been easily incorporated into…

Applied Catalysis A : General, 2019, 579, pp.1-8. ⟨10.1016/j.apcata.2019.04.009⟩. ⟨hal-02182080⟩

• Chapitre d'ouvrage

Structure and Surface Study of Hydroxyapatite-Based Materials: Experimental and Computational Approaches

Guylène Costentin, Christophe Drouet, Fabrice Salles, Stéphanie Sarda

In addition to designing catalytic materials ever more active and selective, the emergence of new classes of greener catalysts remains very challenging. The apatite family system with hydroxyapatite (HA) structure appears as a good candidate for catalysis due to its eco-compatibility properties,…

Design and Applications of Hydroxyapatite-Based Catalysts, 2022, ⟨10.1002/9783527830190.ch3⟩. ⟨hal-03727861⟩

• Article dans une revue

Long-Lived Charge-Separated States in ZnS/Na-MOR Zeolite upon <i>trans</i>-Stilbene Adsorption

Pedro Henrique Morais Andrade, Matthieu Hureau, Anne-Sophie Mamede, Pascale Massiani, Alexandre Legrand, Alain Moissette

Electron transfer (ET) processes are of fundamental importance in many photochemical processes in biological and chemical systems. Here, semiconductor nanoparticles of ZnS (as electron relay) and trans-stilbene molecules (t-St) (as electron donor), both confined within the porous volume of…

• Article dans une revue

Current state of electrochemical techniques and corrosion rate analysis for next-generation materials

Junsoo Han, Oumaïma Gharbi

Current theoretical models and electrochemical techniques used to investigate corrosion mechanisms, including corrosion rates, have been tailored for conventional alloy systems. However, the application of conventional theories and techniques toward next-generation alloys such as multi-principal…

Current Opinion in Electrochemistry, 2022, 36, pp.101131. ⟨10.1016/j.coelec.2022.101131⟩. ⟨hal-03776989⟩

• Article dans une revue

Semiconductor quantum dots reveal dipolar coupling from exciton to ligand vibration

T. Noblet, L. Dreesen, S. Boujday, C. Methivier, Bertrand Busson, A. Tadjeddine, Christophe Humbert

Within semiconductor quantum dots (QDs), exciton recombination processes are noteworthy for depending on the nature of surface coordination and nanocrystal/ligand bonding. The influence of the molecular surroundings on QDs optoelectronic properties is therefore intensively studied. Here, from the…

Communications Chemistry, 2018, 1, pp.76. ⟨10.1038/s42004-018-0079-y⟩. ⟨hal-02111047v2⟩

• Article dans une revue

Hydroxyapatite: A Matrix for Metal Exsolution Leading to Highly Dispersed Catalytically Active Species

Josefine Schnee, Ferdaous Ben Romdhane, François Devred, Antoine Miche, Alixandre Magerat, Diane Reja, Eric Gaigneaux, Marco Daturi, Cyril Thomas, Guylène Costentin

Hydroxyapatite (Ca10(PO4)6(OH)2, or HAp) -the main mineral component of bones and teeth -is a material of great interest not only in biomedical applications but also in heterogeneous catalysis. Its framework Ca 2+ cations can be substituted by a wide variety of catalytically active metals (Cu 2+ ,…

Chemistry of Materials, 2024, 36 (3), pp.1188-1196. ⟨10.1021/acs.chemmater.3c01749⟩. ⟨hal-04747806⟩

• Article dans une revue

Antibacterial properties of glycosylated surfaces: variation of the glucosidal moiety and fatty acid conformation of grafted microbial glycolipids

Claire Valotteau, Sophie Roelants, Dasaiyan Prabhu, Susanne Zibek, Michael Günther, Wim Soetaert, Bernd Everaert, Claire-Marie Pradier, Florence Babonneau, Niki Baccile, Vincent Humblot

Glycosylated surfaces can display antimicrobial properties. It has been shown that sophorolipids can be used to develop biocidal coatings against Gram-positive and Gram-negative bacteria, but with a limited efficiency so far. Therefore, it appears necessary to further investigate the surface…

Molecular Systems Design & Engineering, 2020, 5 (7), pp.1307 - 1316. ⟨10.1039/D0ME00059K⟩. ⟨hal-03414300⟩