|Electrical leakage through thin PDMS microchannel walls and its applications|
|Sun JS; Vajandar SK; Xu DY; Kang YJ; Li DQ; Li DY; Hu GQ(胡国庆); Sun, J.
|Source Publication||ASME International Mechanical Engineering Congress and Exposition, Proceedings
|Conference Name||2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
|Conference Date||October 31, 2008 - November 6, 2008
|Conference Place||Boston, MA, United states
|Abstract||PDMS is usually considered as a dielectric material and PDMS microchannel walls can be treated as an electrically insulated boundary. However, in certain layouts of microfluidic networks, electrical leakage through PDMS walls could significantly alter the electrical field in the microfluidic circuits, which must be carefully considered in microfluidic circuit design. We report on our experimental characterization of electrical leakage through PDMS microfluidic channel walls. Numerical modeling clearly disclosed the alteration of electrical field and electroosmotic velocity in the microfluidic channels because of the electrical leakage through the thin PDMS wall. In addition, we demonstrate that the electrical leakage through the PDMS channel wall can be used to realize trapping of individual particles at different locations inside the mcirofluidic channel by balancing the electroosmotic flow and electrophoretic migration of the particle. Copyright © 2008 by ASME.|
|Corresponding Author||Sun, J.|
Sun JS,Vajandar SK,Xu DY,et al. Electrical leakage through thin PDMS microchannel walls and its applications[C],2009.
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