Electrochemistry of Biosystems
Linking Glucose Oxidation to Luminol-based Electrochemiluminescence using bipolar Electrochemistry
Asymmetric Modification of TiO2 Nanofibers with Gold by Electric-Field-Assisted Photochemistry
Stimuli-responsive microgels for electrochemiluminescence amplification
Valérie RAVAINE
Position:
Associate Professor ENSCBP
Address:
Groupe NanoSystèmes Analytiques
Institut des Sciences Moléculaires - UMR 5255 CNRS
Université de Bordeaux - ENSCBP
16, Avenue Pey-Berland
33607 PESSAC Cedex
FRANCE
Phone:
+33(0)5 40 00 27 30
Send an Email
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Miscellaneous Information:

Since 1999 : Assistant Professor at the "Ecole Nationale Supérieure de Chimie et de Physique de Bordeaux" (E.N.S.C.P.B.)

Research interests :
Stimuli-responsive hydrogels and microgels : new tools for analytical chemistry.
1) New stationary phases for capillary electrochromatography (CEC): application to the separation of macromolecular species and comprehensive study of their separation mechanisms.
2) Molecular-responsive microgels: design of structured microgels and their application to glucose sensors and drug delivery systems.

1997-99 : Post-doctoral position at the Centre de Recherche Paul Pascal, Pessac, France. Emulsion group directed by Pr. Jérôme Bibette, in collaboration with Fournier company.
Subject : double emulsions as new vectors for drug delivery : fundamental understanding of their metastability and their interactions with biological cells

1996-97 : Post-doctoral position at the Department of Chemistry, University of Florida, Gainesville. Polymer group directed by Pr. Randy S. Duran, in collaboration with Rhône-Poulenc company.
Subject : Superspreading mechanisms of silicone surfactants in aqueous solution

1996 : Ph.D. in Physical Chemistry at the University of Bordeaux, France.
Title : From mesogenic compounds to dimesogenic ones : new chiral and frustrated mesophases.

1993 : D.E.A. diploma in Physical Chemistry at the University of Bordeaux, obtained with distinctions.

1990 - 1993 : Engineering School of Physics and Chemistry, Bordeaux, France

Self-coacervation of ampholyte polymer chains as an efficient encapsulation strategy.


Thursday, 02 May 2019
A. Perro, L. Giraud, N. Coudon, S. Shanmugathasan, B. Goudeau, J.-P. Douliez and V. Ravaine Journal of Colloid and Interface Science 2019 548, 275-283. Coacervation is a phase separation process involving two aqueous phases, one solute-phase and one solute-poor phase. It is frequently observed among oppositely-charged polyelectrolyte systems. In this study, we focus on self-coacervation involving a single polymer chain and investigate its potential for encapsulation applications.... Read More...

Kinetics of spontaneous microgels adsorption and stabilization of emulsions produced using microfluidics


Thursday, 02 May 2019
M.-C. Tatry, E. Laurichesse, A. Perro, V. Ravaine and V. Schmitt Journal of Colloid and Interface Science 2019, 548, 1-11. The aim of the paper is to examine the adsorption kinetics of soft microgels and to understand the role off undamental parameters such as electrostatics and deformability on the process. This knowledge is further exploited to produce microgel-stabilized emulsions using a co-flow microfluidic device.Uncharged microgels made of poly(N-isopropylacrylamide) are synthesized... Read More...

Adsorption of Proteins on Dual Loaded Silica Nanocapsules


Thursday, 02 May 2019
S. Ramalingam, G. Le Bourdon, E. Pouget, A. Scalabre, J. Raghava Rao and A. Perro J. Phys. Chem B 2019, 123 (7), 1708-1717. The design of nanocarriers containing hydrophobic and hydrophilic compounds represents a powerful tool for cocktail delivery. Water-in-oil-in-water emulsions constitute an attractive approach as they offer dual encapsulation and provide a template for the constitution of a capsule. A limitation in the preparation of nano double emulsions is their instability... Read More...

Sealing hyaluronic acid microgel with oppositely-charged polypeptide: a simple strategy for packaging hydrophilic drugs with on-demand release.


Thursday, 02 May 2019
H. Labie, A. Perro, V. Lapeyre, B. Goudeau, B. Catargi, R. Auzély, V. Ravaine  Journal of Colloid and Interface Science 2019, 535, 16-27. A simple route to deliver on demand hydrosoluble molecules such as peptides, packaged in biocompatible and biodegradable microgels, is presented. Hyaluronic acid hydrogel particles with a controlled structure are prepared using a microfluidic approach. Their porosity and their rigidity can be tuned by changing the crosslinking density. These... Read More...

Circularly Polarized-Electrochemiluminescence from a Chiral Bispyrene Organic Macrocycle


Monday, 08 April 2019
F. Zinna, S. Voci, L. Arrico, E. Brun, A. Homberg, L. Bouffier, T. Funaioli, J. Lacour, N. Sojic, L. Di Bari Angew. Chem. Int. Ed., 2019. The first observation of circular polarization of electrochemiluminescence (ECL) from a purely organic derivative is reported. A bis‐pyrene scaffold mounted on a constrained polyether macrocycle displaying intense excimer fluorescence and highly circularly polarized (CP) photoluminescence has been selected for this purpose. Such compound displays an ECL... Read More...