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Advances in OptoElectronics
Volume 2011 (2011), Article ID 394683, 8 pages
http://dx.doi.org/10.1155/2011/394683
Research Article

Moldless PEGDA-Based Optoelectrofluidic Platform for Microparticle Selection

1Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
2R & D Division, SINONAR Corporation, Hsinchu 30078, Taiwan
3Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30010, Taiwan

Received 6 March 2011; Revised 20 May 2011; Accepted 4 June 2011

Academic Editor: Aaron T. Ohta

Copyright © 2011 Shih-Mo Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper reports on an optoelectrofluidic platform which consists of the organic photoconductive material, titanium oxide phthalocyanine (TiOPc), and the photocrosslinkable polymer, poly (ethylene glycol) diacrylate (PEGDA). TiOPc simplifies the fabrication process of the optoelectronic chip due to requiring only a single spin-coating step. PEGDA is applied to embed the moldless PEGDA-based microchannel between the top ITO glass and the bottom TiOPc substrate. A real-time control interface via a touch panel screen is utilized to select the target 15 μm polystyrene particles. When the microparticles flow to an illuminating light bar, which is oblique to the microfluidic flow path, the lateral driving force diverts the microparticles. Two light patterns, the switching oblique light bar and the optoelectronic ladder phenomenon, are designed to demonstrate the features. This work integrating the new material design, TiOPc and PEGDA, and the ability of mobile microparticle manipulation demonstrates the potential of optoelectronic approach.