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dimanche 30 avril 2017

Indirect Bipolar Electrodeposition

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

Références

Propulsion of microobjects by dynamic bipolar self-regeneration
J. Am. Chem. Soc. 2010132, 15918-15919.

Multiresponsive hybrid microgels and hollow capsules with a layered structure
Langmuir 200925, 4659-4667.

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