Interaction of nanoparticles at the DEP microelectrode interface under high conductance conditions

Rajaram Krishnan; Dietrich A. Dehlinger; Gregory J. Gemmen; Robert L. Mifflin; Sadik C. Esener; Michael J. Heller

doi:10.1016/j.elecom.2009.06.033

Interaction of nanoparticles at the DEP microelectrode interface under high conductance conditions

Rajaram Krishnan, Dietrich A. Dehlinger, Gregory J. Gemmen, Robert L. Mifflin, Sadik C. Esener, Michael J. Heller

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1661-1666
Number of pages	6
Journal	Electrochemistry Communications
Volume	11
Issue number	8
DOIs	https://doi.org/10.1016/j.elecom.2009.06.033
State	Published - Aug 2009
Externally published	Yes

Keywords

Dielectrophoresis
Electrochemistry
High conductance
Microelectrodes
Nanoparticles

ASJC Scopus subject areas

Electrochemistry

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10.1016/j.elecom.2009.06.033

Cite this

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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.",

keywords = "Dielectrophoresis, Electrochemistry, High conductance, Microelectrodes, Nanoparticles",

author = "Rajaram Krishnan and Dehlinger, {Dietrich A.} and Gemmen, {Gregory J.} and Mifflin, {Robert L.} and Esener, {Sadik C.} and Heller, {Michael J.}",

note = "Funding Information: We thank Roy Lefkowitz and Jennifer Marciniak for their input. Financial support from UCSD and NIH NanoTUMOR Center (U54-CA119335) is acknowledged.",

year = "2009",

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doi = "10.1016/j.elecom.2009.06.033",

language = "English (US)",

volume = "11",

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journal = "Electrochemistry Communications",

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TY - JOUR

T1 - Interaction of nanoparticles at the DEP microelectrode interface under high conductance conditions

AU - Krishnan, Rajaram

AU - Dehlinger, Dietrich A.

AU - Gemmen, Gregory J.

AU - Mifflin, Robert L.

AU - Esener, Sadik C.

AU - Heller, Michael J.

N1 - Funding Information: We thank Roy Lefkowitz and Jennifer Marciniak for their input. Financial support from UCSD and NIH NanoTUMOR Center (U54-CA119335) is acknowledged.

PY - 2009/8

Y1 - 2009/8

N2 - 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.

AB - 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.

KW - Dielectrophoresis

KW - Electrochemistry

KW - High conductance

KW - Microelectrodes

KW - Nanoparticles

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JO - Electrochemistry Communications

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IS - 8

ER -

Interaction of nanoparticles at the DEP microelectrode interface under high conductance conditions

Abstract

Keywords

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