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Electrical Manipulation of Gold Nanoparticles for Microfluidic Applications



Darwin R. Reyes-Hernandez, Geraldine I. Mijares, Kimberly A. Briggman, Jon C. Geist, Michael Gaitan


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)


Gold nanoparticles, Impedance, Self-assembled monolayers, Electrical manipulation


Reyes-Hernandez, D. , Mijares, G. , Briggman, K. , Geist, J. and Gaitan, M. (2008), Electrical Manipulation of Gold Nanoparticles for Microfluidic Applications, The Proceedings of MicroTAS 2008 Conference, San Diego, CA, [online], (Accessed April 18, 2024)
Created October 16, 2008, Updated January 27, 2020