TY - JOUR
T1 - A catalytically powered electrokinetic lens
T2 - Toward channelless microfluidics
AU - Zhang, Jiayun
AU - Catchmark, Jeffrey M.
N1 - Funding Information:
Acknowledgments This work was supported by the Penn State Center for Nanoscale Science; NSF Grant DMR-0213623; NSF-NIRT Grant CTS-0506967; National Science Foundation Cooperative Agreement 0335765; the National Nanotechnology Infrastructure Network, with Cornell University; and The Pennsylvania State University Materials Research Institute. The authors would like to acknowledge the contributions made by Rachel Rorick for device fabrication.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/5
Y1 - 2011/5
N2 - A chemically powered channelless microfluidic device was designed, fabricated, and characterized. The device consists of an asymmetric silver-gold bimetallic catalytic junction fabricated on a silicon dioxide surface. The decomposition of hydrogen peroxide at the silver-gold interface generates a proton gradient and an associated electric field which in turn drives electroosmosis and electrophoresis when a charged particle is present in the vicinity of the field. By engineering an asymmetric device consisting of an isolated junction, continuous electroosmotic fluid flow across the device has been achieved. In addition, a new device geometry has been developed which is capable of focusing and directing negatively charged particles along a desired path without the need of microchannels. The efficiency and ease of the fabrication suggest the possibility of many versatile applications including biological molecule sorting and manipulation.
AB - A chemically powered channelless microfluidic device was designed, fabricated, and characterized. The device consists of an asymmetric silver-gold bimetallic catalytic junction fabricated on a silicon dioxide surface. The decomposition of hydrogen peroxide at the silver-gold interface generates a proton gradient and an associated electric field which in turn drives electroosmosis and electrophoresis when a charged particle is present in the vicinity of the field. By engineering an asymmetric device consisting of an isolated junction, continuous electroosmotic fluid flow across the device has been achieved. In addition, a new device geometry has been developed which is capable of focusing and directing negatively charged particles along a desired path without the need of microchannels. The efficiency and ease of the fabrication suggest the possibility of many versatile applications including biological molecule sorting and manipulation.
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U2 - 10.1007/s10404-010-0757-2
DO - 10.1007/s10404-010-0757-2
M3 - Article
AN - SCOPUS:79956103589
SN - 1613-4982
VL - 10
SP - 1147
EP - 1151
JO - Microfluidics and Nanofluidics
JF - Microfluidics and Nanofluidics
IS - 5
ER -