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Microplasma patterning of bonded microchannels using high-precision "injected" electrodes

Research output: Contribution to journalJournal articlepeer-review

Published
  • Craig Priest
  • Philipp J. Gruner
  • Endre J. Szili
  • Sameer A. Al-Bataineh
  • James W. Bradley
  • John Ralston
  • David A. Steele
  • Robert D. Short
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<mark>Journal publication date</mark>7/02/2011
<mark>Journal</mark>Lab on a Chip
Issue number3
Volume11
Number of pages4
Pages (from-to)541-544
Publication StatusPublished
Early online date28/10/10
<mark>Original language</mark>English

Abstract

A rapid, high-precision method for localised plasma-treatment of bonded PDMS microchannels is demonstrated. Patterned electrodes were prepared by injection of molten gallium into preformed microchannel guides. The electrode guides were prepared without any additional fabrication steps compared to conventional microchannel fabrication. Alignment of the "injected" electrodes is precisely controlled by the photomask design, rather than positioning accuracy of alignment tools. Surface modification is detected using a fluorescent dye (Rhodamine B), revealing a well-defined micropattern with regions less than 100 mu m along the length of the microchannel.