Chitosan-Mediated and Spatially Selective Electrodeposition of Nanoscale Particles

• DOI: 10.1021/la047420c
• Publication Date: 2005-04-05T04:54:47Z
• Authors: Li-Qun Wu; Kyuyong Lee; Xiang Wang; Douglas S. English; Wolfgang Losert; Gregory F. Payne
• Keywords: Microscale chemistry; Deposition

Nanoscale particles offer a variety of interesting properties, and there is growing interest in their assembly into higher ordered structures. We report that the pH-responsive aminopolysaccharide chitosan can mediate electrodeposition model nanoparticles. Chitosan known to electrodeposit at cathode surface response high localized pH. To demonstrate nanoparticle deposition, we suspended fluorescently labeled latex nanoparticles (100 nm diameter spheres) solution (1%) performed (0.05 mA/cm2 for several minutes). Results required electrodeposition; confers spatial selectivity distribute throughout electrodeposited film. Additionally, observed deposited films reversibly swell upon rehydration. This work indicates provides simple means assemble addressable locations further evidence stimuli-responsive biological materials may facilitate fabrication microscale.