Electrical isolation and characteristics of permanent magnet-actuated valves for PDMS microfluidics

Chang Yu Chen, Chang Hung Chen, Ting-Yuan Tu, Cheng Ming Lin, Andrew M. Wo

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This paper presents a magnetically driven valve via a permanent magnet pressing a spacer against deformable polydimethylsiloxane (PDMS) to fully close a microchannel. Its ability for electrical isolation, time response, and resistance to backpressure are interrogated. Simulation of the valve closing process was commenced along with experimental verification. Effects of PDMS thickness, and dimension and aspect ratio of microchannels were characterized. Up to 10 GΩ electrical isolation was demonstrated, as well as 50-70 ms valve response and ∼200 kPa resistible pressure. On-demand actuation for arbitrary flow patterns further quantifies its utility. With advantages of simple fabrication, flexible valving location, and no external power requirement, the on/off valve could be leveraged for proof-of-concept microfluidic devices and other applications.

Original languageEnglish
Pages (from-to)733-737
Number of pages5
JournalLab on a Chip
Volume11
Issue number4
DOIs
Publication statusPublished - 2011 Feb 21

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Microfluidics
Magnets
Lab-On-A-Chip Devices
Polydimethylsiloxane
Microchannels
Permanent magnets
Flow patterns
Aspect ratio
Pressure
Fabrication
baysilon

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biochemistry
  • Chemistry(all)
  • Biomedical Engineering

Cite this

Chen, Chang Yu ; Chen, Chang Hung ; Tu, Ting-Yuan ; Lin, Cheng Ming ; Wo, Andrew M. / Electrical isolation and characteristics of permanent magnet-actuated valves for PDMS microfluidics. In: Lab on a Chip. 2011 ; Vol. 11, No. 4. pp. 733-737.
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Electrical isolation and characteristics of permanent magnet-actuated valves for PDMS microfluidics. / Chen, Chang Yu; Chen, Chang Hung; Tu, Ting-Yuan; Lin, Cheng Ming; Wo, Andrew M.

In: Lab on a Chip, Vol. 11, No. 4, 21.02.2011, p. 733-737.

Research output: Contribution to journalArticle

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