Interaction of Nanoparticles at the DEP Microelectrode Interface under High Conductance Conditions.
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.
Krishnan
Rajaram
R
Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0448.
Dehlinger
Dietrich A
DA
Gemmen
Gregory J
GJ
Mifflin
Robert L
RL
Esener
Sadik C
SC
Heller
Michael J
MJ