Laboratoire de réactivité de surface

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  • Article dans une revue

ADSORPTION ON STAINLESS STEEL SURFACES OF BIOSURFACTANTS PRODUCED BY GRAM-NEGATIVE AND GRAM-POSITIVE BACTERIA : CONSEQUENCE ON THE BIOADHESIVE BEHAVIOR OF PATHOGENIC STRAINS.

Thierry Meylheuc, Christophe Méthivier, Margareth Renault, Jean-Marie Herry, Claire-Marie Pradier, Marie-Noëlle Bellon-Fontaine

The ability of adsorbed biosurfactants (Pf and Lb) obtained from gram negative bacterium (Pseudomonas fluorescens) or gram positive bacterium (Lactobacillus helveticus) to inhibit adhesion of four listerial strains to stainless steel was investigated. These metallic surfaces were characterized…

Colloids and Surfaces B: Biointerfaces, 2006, 52 (2), pp.146-155. ⟨10.1016/j.colsurfb.2006.04.016⟩. ⟨hal-00111667⟩

  • Article dans une revue

Effect of water on cobalt speciation during solid-state synthesis of Co2+/ZSM5 catalysts: quantitative study by TPR and XAS

Eric Marceau, Michel Che, Françoise Villain, Younès Ben Taarit

The effect of water on cobalt speciation in the synthesis of Co2+/ZSM5 catalysts is quantitatively studied by the combined use of macroscopic and local characterization techniques, TPR and X-ray absorption spectroscopies, respectively. The addition of a small quantity of water to cobalt acetate and…

Microporous and Mesoporous Materials, 2006, 93, pp.62-70. ⟨10.1016/j.micromeso.2006.02.004⟩. ⟨hal-00109394⟩

  • Article dans une revue

On the clarification of the IR stretching vibration assignment of adsorbed N2 on Rh0 and Rhd+ surface atoms of supported Rh crystallites

Céline Fontaine-Gautrelet, Jean-Marc Krafft, Gérald Djéga-Mariadassou, Cyril Thomas

The low temperature adsorption of N2 on Rh/SiO2 samples of various particle-size distributions was followed by FTIR. The addition of O2 pulses on Rh0 surfaces saturated with chemisorbed N2 allowed us to reassign stretching frequencies attributed originally to N2-Rh0 to N2-RhΔ+. The formation of the…

Journal of Physical Chemistry B, 2006, 110, pp.10075-10081. ⟨10.1021/jp061077y⟩. ⟨hal-00079961⟩

  • Article dans une revue

Surface plasmon resonance biosensors incorporating gold nanoparticles.

Erin Bedford, Jolanda Spadavecchia, Claire-Marie Pradier, Frank Gu

SPR biosensing is increasingly popular for the detection of a multitude of biomolecules. It offers label-free detection and study of proteins, nucleic acids, and other biomolecules in real time. A recent trend involves incorporation of AuNPs, either within the sensing surface itself or as signal…

Macromolecular Bioscience, 2012, 12, pp.724-739. ⟨10.1002/mabi.201100435⟩. ⟨hal-00745836⟩

  • Article dans une revue

Bioconjugated gold nanorods to enhance the sensitivity of FT-SPR-based biosensors

Jolanda Spadavecchia, Sandra Casale, Souhir Boujday, Claire-Marie Pradier

n this paper, we report a feasible solvent-free approach for the synthesis and self-assembling of gold nanorods after bioconjugation to antibodies; scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images revealed a remarkable shape and size narrow distribution, as well…

Colloids and Surfaces B: Biointerfaces, 2012, 100, pp.1-8. ⟨10.1016/j.colsurfb.2012.03.035⟩. ⟨hal-00744490⟩

  • Article dans une revue

New insights into the development of Brønsted acidity of niobic acid

Vanessa Lebarbier, Marwan Houalla, Thomas Onfroy

The development of Brønsted acidity and the relationship between acidity, catalytic performance and structure of niobium oxide were investigated for a series of samples prepared by calcination of niobic acid at temperatures between 423 and 823 K. All solids were active for propan-2-ol dehydration.…

Catalysis Today, 2012, 192, pp.123-129. ⟨10.1016/j.cattod.2012.02.061⟩. ⟨hal-00745977⟩

  • Article dans une revue

Selective catalytic reduction of NO on single site FeSiBEA zeolite catalyst: Influence of the C1 and C2 reducing agents on the catalytic properties

Janusz Janas, Wojciech Rojek, Tetsuya Shishido, Stanislaw Dzwigaj

FeSiBEA zeolite with 0.8 Fe wt% is prepared in acidic condition (pH 2.5) by a two-step postsynthesis method which allows to incorporate iron into framework of zeolite as mononuclear distorted tetrahedral Fe(III) species, as evidenced by XRD, diffuse reflectance UV-vis and X-ray absorption…

Applied Catalysis B: Environmental, 2012, 123-124, pp.134-140. ⟨10.1016/j.apcatb.2012.04.026⟩. ⟨hal-00744653⟩

  • Article dans une revue

Highly porous and monodisperse magnetic silica beads prepared by a green templating method

Sebastien Abramson, Clementine Meiller, Patricia Beaunier, Vincent Dupuis, Laurent Perrigaud, Agnes Bee, Valerie Cabuil

We describe the prepn. of magnetic silica nanocomposite millimetric beads using alginate as a green biopolymer template. The simple and soft method which is used here is particularly suitable since the alginate template allows a multiscale control of the structure of the material, both its morphol.…

Journal of Materials Chemistry, 2010, 20 (23), pp.4916-4924. ⟨10.1039/C000525H⟩. ⟨hal-00604697⟩

  • Article dans une revue

Study of the use of fluidized bed plasma reactors for the treatment of alumina supported palladium catalyst: Application for SCR NOx by CH4 in stationary sources

Marjorie Foix, Cedric Guyon, Michael Tatoulian, Patrick da Costa

Calcination is an important step in catalyst synthesis. This work examd. plasma treatment as an alternative to calcination, since it is a more energy efficient process. A radio frequency, fluidized bed plasma reactor was used for the pretreatment process with different gas mixts. (Ar and Ar/O2…

Catalysis Communications, 2010, 12 (1), pp.20-24. ⟨10.1016/j.catcom.2010.05.022⟩. ⟨hal-00604716⟩

  • Article dans une revue

Bioengineering of stainless steel surface by covalent immobilization of enzymes. Physical characterization and interfacial enzymatic activity

Anne Caro, Vincent Humblot, Christophe Methivier, Michel Minier, Lucica Barbes, Joachim Li, Michele Salmain, Claire-Marie Pradier

Two hydrolytic enzymes, namely lysozyme and trypsin, were covalently immobilized onto stainless steel surfaces using wet chemistry processes. The immobilization strategy took advantage of the spontaneous physisorption of the polymer poly(ethylene imine) (PEI) onto stainless steel to yield a firmly…

Journal of Colloid and Interface Science, 2010, 349 (1), pp.13-18. ⟨10.1016/j.jcis.2009.12.001⟩. ⟨hal-00604709⟩