Colloidal microstructures, transport, and impedance properties within interfacial microelectrodes

Pradipkumar Bahukudumbi, W. Neil Everett, Ali Beskok, Michael A. Bevan, Gregory H. Huff, Dimitris Lagoudas, Zoubeida Ounaies

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The authors report in situ measurements of the reversible, electric field mediated assembly of colloidal gold microstructures and their associated impedance properties on surfaces between planar gold film microelectrodes. Video optical microscopy is used to monitor the assembly of wires and locally concentrated configurations having variable resistances and capacitances. A scaling analysis of dominant electrokinetic transport mechanisms at different electric field amplitudes and frequencies is consistent with the observed steady-state microstructures. Impedance spectra are fit to equivalent circuits with elements directly connected to physical characteristics of the microelectronic/fluidic device components and different particle microstructures.

Original languageEnglish (US)
Article number224102
JournalApplied Physics Letters
Volume90
Issue number22
DOIs
StatePublished - 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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