Integration of organic opto-electrowetting and poly(ethylene) glycol diacrylate (PEGDA) microfluidics for droplets manipulation

Tung Ming Yu*, Shih Mo Yang, Chien Yu Fu, Ming Huei Liu, Long Hsu, Hwan You Chang, Cheng Hsien Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

This paper reports a fabrication technology which integrates organic opto-electrowetting (OEW) with PEGDA-based microfluidics between stacked ITO glass chips for droplets generation and manipulation. Organic OEW can be realized by using titanium oxide phthalocyanine (TiOPc) as a photoconductive layer. Optical images can be projected on an organic OEW area to induce the local virtual electrodes which reduce the surface energy for actuating droplets. Low-molecular-weight (LMW) PEGDA (poly(ethylene) glycol diacrylate) material is used to form stable and biocompatible microchannels between the stacked ITO glass chips by UV photopolymerization process. PEGDA-based microfluidics provides a simpler way to enhance droplets applications in organic OEW. We demonstrate (1) the droplet formation in PEGDA microstructure, (2) the motion of droplet-in-air and droplet-in-oil operated by TiOPc OEW in this platform. This technology requires only spin-coating and UV exposure and is more cost-effective than previous methods.

Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume180
DOIs
StatePublished - 1 Apr 2013

Keywords

  • Dielectrophoresis (DEP)
  • Electrowetting on dielectric (EWOD)
  • Opto-electrowetting (OEW)
  • Photo-conductor
  • Poly(ethylene) glycol diacrylate (PEGDA)
  • TiOPc

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