Microplasma patterning of bonded microchannels using high-precision "injected" electrodes |
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| Authors: | Priest Craig Gruner Philipp J Szili Endre J Al-Bataineh Sameer A Bradley James W Ralston John Steele David A Short Robert D |
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| Institution: | Ian Wark Research Institute, University of South Australia, Mawson Lakes, SA, 5095, Australia. craig.priest@unisa.edu.au |
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| 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 μm along the length of the microchannel. |
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