title: Interaction of Nanoparticles at the DEP Microelectrode Interface under High Conductance Conditions.
abstract: The separation of nanoparticles from micron size particles in high conductance buffers was achieved using an AC dielectrophoretic (DEP) microarray device with hydrogel over-coated microelectrodes. While nanoparticles could be selectively concentrated into high field regions directly over the platinum microelectrodes, micro-bubbling and electrode darkening was also observed. For similar experiments using un-coated microelectrodes, SEM analysis showed severe erosion of the platinum microelectrodes and fusion of nanoparticles due to the aggressive electrochemistry.
authors.affiliation: Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0448.
authors.forename: Rajaram
authors.initials: R
authors.lastname: Krishnan
authors.forename: Dietrich A
authors.initials: DA
authors.lastname: Dehlinger
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Gemmen
authors.forename: Robert L
authors.initials: RL
authors.lastname: Mifflin
authors.forename: Sadik C
authors.initials: SC
authors.lastname: Esener
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Heller