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

Loget G., Roche J., Gianessi E., Bouffier L., Kuhn A.,
J. Am. Chem.Soc. 2012, 134, 20033-20036.

Based on the principles of bipolar electrochemistry, localized pH gradients are generated at the surface of conducting particles in solution. This allows the toposelective deposition of inorganic and organic polymer layers via a pH-triggered precipitation mechanism. Due to the intrinsic symmetry breaking of the process, the concept can be used to generate in a straightforward way Janus particles, with one section consisting of deposits obtained from non-electroactive precursors. These indirect electrodeposits, such as SiO2, TiO2, or electrophoretic paints, can be further used as an immobilization matrix for other species like dyes or nanoparticles, thus opening promising perspectives for the synthesis of a variety of bifunctional objects with a controlled shape.

 

JACS2012 p20033 TOC

Fattah Z., Garrigue P., Lapeyre V., Kuhn A., Bouffier L.,
J. Phys. Chem. C 2012, 116, 22021-22027.

Asymmetric particles of various chemical compositions have attracted great attention because of their application potential in different areas, ranging from photosplitting of water to autonomous swimmers. In this context, the spatial arrangement of the different components can be of major importance. We report here a bulk procedure based on bipolar electrochemistry that allows generating asymmetric particles with a highly controlled spatial orientation of a metal deposit on a carbon substrate. Two fundamentally different topologies of the metal deposit can be obtained as a function of controllable experimental parameters like the orientation and amplitude of the electric field as well as the viscosity of the medium.

 

JPhysChemC2012 p22012 TOC

Sentic M., Loget G., Manojlovic D., Kuhn A., Sojic N.,
Angew. Chem. Int. Ed. 2012, 51, 11284–11288.

Swimmer in the dark: Propulsion of a conducting object is intrinsically coupled with light emission using bipolar electrochemistry. Asymmetric redox activity on the surface of the swimmer (black bead; see picture) causes production of gas bubbles to propel the swimmer in a glass tube with simultaneous electrochemiluminescence (ECL) emission to monitor the progress of the swimmer.

 

AngewChem2012 p11284 TOC

 

Video:

Zigah D., Rodriguez-Lopez P., Bard A. J.,
Phys. Chem. Chem. Phys. 2012, 14, 12764-12772.

Asymmetric particles of various chemical compositions have attracted great attention because of their application potential in different areas, ranging from photosplitting of water to autonomous swimmers. In this context, the spatial arrangement of the different components can be of major importance. We report here a bulk procedure based on bipolar electrochemistry that allows generating asymmetric particles with a highly controlled spatial orientation of a metal deposit on a carbon substrate. Two fundamentally different topologies of the metal deposit can be obtained as a function of controllable experimental parameters like the orientation and amplitude of the electric field as well as the viscosity of the medium.

 

PhysChemChemPhys2012 p12764 TOC

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... 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... 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... Read More...