Laboratoire de réactivité de surface

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  • Article dans une revue

Intracellular biosynthesis of superparamagnetic 2-lines ferri-hydrite nanoparticles using Euglena gracilis microalgae

Roberta Brayner, Thibaud Coradin, Patricia Beaunier, Jean-Marc Greneche, Chakib Djediat, Claude Yéprémian, Alain Couté, Fernand Fievet

The intracellular biosynthesis of superparamagnetic (blocking temperature 5.6 K) 2-lines ferrihydrite (Fh2L) nanoparticles was observed within living Euglena gracilis microalgae.

Colloids and Surfaces B: Biointerfaces, 2012, 93, pp.20-23. ⟨10.1016/j.colsurfb.2011.10.014⟩. ⟨hal-00750391⟩

  • Article dans une revue

Effects of organic and inorganic treatment agents on the formation of conversion layer on hot-dip galvanized steel: An X-ray photoelectron spectroscopy study

S. Le Manchet, D. Verchere, Jessem Landoulsi

The formation of a Cr-free conversion layer on hot-dip galvanized (HDG) steel involves various interfacial processes which radically influence the composition of the coating and thus its performance. Here, we investigate the role of the main constituents contained in the treatment bath, the…

Thin Solid Films, 2012, 520, pp.2009-2016. ⟨10.1016/j.tsf.2011.09.064⟩. ⟨hal-00748848⟩

  • Article dans une revue

Enhanced selective nitroarene hydrogenation over Au supported on b-Mo2C and b-Mo2C/Al2O3

Noemie Perret, Xiaodong Wang, Laurent Delannoy, Claude Potvin, Catherine Louis, Mark A. Keane

b-Mo2C and b-Mo2C/Al2O3 have been synthesised via temperature programmed carburisation and employed, for the first time, as supports for gold catalysts. 1%w/w Au/Mo2C and Au/Mo2C/Al2O3 were prepared by deposition-precipitation with urea and used to promote the gas phase hydrogenation of para-…

Journal of Catalysis, 2011, 286, pp.172-183. ⟨10.1016/j.jcat.2011.10.026⟩. ⟨hal-00687605⟩

  • Article dans une revue

Alternated p-Conjugated Polymers Based on a 1,2- Diiminocyclohexane Chiral Unit for Nitroaromatics Sensing

Simon Clavaguera, Olivier J. Dautel, Lionel Hairault, Christophe Méthivier, Pierre Montméat, Eric Pasquinet, Claire-Marie Pradier, Françoise Serein-Spirau, Salem Wakim, Florian Veignal, Joël J.E. Moreau, Jean-Pierre Lère-Porte

The detection of 2,4-dinitrotoluene (DNT) by fluorescence quenching of a new class of polyimines consisting in p-conjugated segments regularly alternated with chiral C2 symmetry units has been studied for solutions and thin films. Their photophysical properties and their sensitivity towards DNT…

Journal of Polymer Science Part A: Polymer Chemistry, 2009, pp.xxx, xxx. ⟨10.1002/pola.23474⟩. ⟨hal-00394190⟩

  • Article dans une revue

Phase cycling in MQMAS sequences for half-integer quadrupole spins

Redouane Hajjar, Yannick Millot, Pascal P. Man

A review presents the anal. expressions of the first- and second-order quadrupole interactions for a static crystal, and for a crystal rotating at variable or magic angle. It also provides mathematica notebooks for calcg. the anal. expressions of existing interactions. Nested phase cycling in MQMAS…

Progress in Nuclear Magnetic Resonance Spectroscopy, 2010, 57 (3), pp.306-342. ⟨10.1016/j.pnmrs.2010.05.003⟩. ⟨hal-00604722⟩

  • Article dans une revue

Nickel(II) Nitrate vs. Acetate: influence of the Precursor on the Structure and Reducibility of Ni/MCM-41 and Ni/Al-MCM-41 Catalysts

Eric Marceau, Michel Che, Jiri Cejka, Arnost Zukal

Nickel(II) nitrate is the nickel precursor generally selected to prep. oxide-supported catalysts, due to its low cost, high soly. in water and decompn. at moderate temps. However, its decompn. produces NOx, and it is known to melt and redistribute over the support upon heating, leading to poorly…

ChemCatChem, 2010, 2 (4), pp.413-422. ⟨10.1002/cctc.200900289⟩. ⟨hal-00604777⟩

  • Article dans une revue

Chemisorbed atomic oxygen inducing Pd segregation in PdAu(111) alloy: Energetic and electronic DFT analysis

Hazar Guesmi, Catherine Louis, Laurent Delannoy

Segregation energies of isolated Pd in PdAu(1 1 1) alloy are investigated by DFT calculations as a function of the oxygen coverage. Segregation of Pd is found to be oxygen-coverage dependent. While for 'clean' PdAu(1 1 1), Pd prefers to be in the bulk, in the presence of more than 1/3 ML…

Chemical Physics Letters, 2011, 503 (1-3), pp.97-100. ⟨10.1016/j.cplett.2010.12.064⟩. ⟨hal-00602939⟩

  • Article dans une revue

Surface chemistry and surface reactivity of fibrous amphiboles that are not regulated as asbestos

M. Fantauzzi, M. Pacella, J. Fournier, A. Gianfagna, G. B. Andreozzi, A. Rossi

Three fibrous amphiboles that are not regulated as asbestos--two from Biancavilla (Sicily, Italy) and one from Libby (MT, USA)--were studied in order to establish relationships between surface chemistry and surface reactivity. The three fibrous samples, plus one prismatic fluoro-edenite from…

Analytical and Bioanalytical Chemistry, 2012, 404, pp.821-833. ⟨10.1007/s00216-012-6190-5⟩. ⟨hal-00805738⟩

  • Article dans une revue

BSA adsorption on aliphatic and aromatic acid SAMs: Investigating the effect of residual surface charge and sublayer nature

Anne Vallée, Vincent Humblot, Rana Al Housseiny, Souhir Boujday, Claire-Marie Pradier

n this work, the influence of surface charge and layer rigidity on Bovin Serum Albumin (BSA) adsorption has been investigated. To this aim, Self Assembled Monolayers (SAMs) bearing terminal COOH or COO− groups were built on gold surfaces. The rigidity of the acid terminated SAMs was modified using…

Colloids and Surfaces B: Biointerfaces, 2013, 109, pp.136-142. ⟨10.1016/j.colsurfb.2013.03.014⟩. ⟨hal-00915941⟩

  • Article dans une revue

Hydrogen and syngas production by methane dry reforming on SBA-15 supported nickel catalysts: On the effect of promotion by Ce0.75Zr0.25O2 mixed oxide

Abdulkader Albarazi, Patricia Beaunier, Patrick da Costa

In this work, the effects of doping Ni-based SBA-15 catalysts with Ceria-Zirconia mixed oxide (CZ) on the activity and stability of these catalysts during syngas production by methane dry reforming (MDR) were investigated and compared with the activity and stability of unmodified Ni/SBA-15. The…

International Journal of Hydrogen Energy, 2013, 38, pp.127-139. ⟨10.1016/j.ijhydene.2012.10.063⟩. ⟨hal-00913348⟩