A pneumatically controllable flexible and polymeric microfluidic valve fabricated via in situ development

Ju Yeoul Back, Ji Young Park, Jong Il Ju, Tae Soo Lee, Sang Hoon Lee

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

In this paper, we have developed a pneumatically controllable polydimethylsiloxane (PDMS)-based microfluidic valve. This valve regulates 'On/Off' of flow using the thick centered membrane. To integrate the freely moving thick centered membrane, regional bonding of the PDMS layer is required. Here, we integrated such a membrane employing a water soluble mask as a regional bonding method, and the mask was washed out by flowing distilled water. The fabricated valve showed good 'On/Off' operations in accordance with the applied pneumatic pressure source. The flow rate could be regulated by the pressure applied to the inlet (regulated by changes in the height of the water column) and the compression-/vacuum-period ratio (this means the ratio of 'On' and 'Off' periods in each cycle) in the range of a few microliters per minute. For the durability test, ten valves were operated simultaneously one million times, and no failed valves were observed.

Original languageEnglish
Pages (from-to)1015-1020
Number of pages6
JournalJournal of Micromechanics and Microengineering
Volume15
Issue number5
DOIs
Publication statusPublished - 2005 May 1
Externally publishedYes

Fingerprint

Microfluidics
Polydimethylsiloxane
Membranes
Water
Masks
membranes
masks
Pneumatics
water
Durability
Flow rate
Vacuum
pneumatics
durability
flow velocity
vacuum
cycles
baysilon

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)
  • Mechanics of Materials
  • Computational Mechanics

Cite this

A pneumatically controllable flexible and polymeric microfluidic valve fabricated via in situ development. / Back, Ju Yeoul; Park, Ji Young; Ju, Jong Il; Lee, Tae Soo; Lee, Sang Hoon.

In: Journal of Micromechanics and Microengineering, Vol. 15, No. 5, 01.05.2005, p. 1015-1020.

Research output: Contribution to journalArticle

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