An electrical method to trap and release gold nanoparticles to and from the surface of alkanethiol-modified gold electrodes is presented. When a positive bias versus a Ag/AgCl reference electrode was applied to gold electrodes, negatively-charged gold nanoparticles (GNPs) were attracted towards and attached to the surface more rapidly than without bias. Partial release was provided by negative bias, and varied depending on the alkanethiol used to modify the gold electrode. This work describes the accelerated concentration of GNPs on the surface of the electrodes, their entrapment, and final release for applications such as nanotoxicity studies.
Proceedings Title: The Proceedings of MicroTAS 2008 Conference
Conference Dates: October 12-16, 2008
Conference Location: San Diego, CA
Conference Title: The Twelfth International Conference on Miniaturized Systems for Chemistry and Life Sciences (µTAS 2008)
Pub Type: Conferences
Gold nanoparticles, Impedance, Self-assembled monolayers, Electrical manipulation