Progress in patterned paper sizing for fabrication of paper-based microfluidic sensors |
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Authors: | Xu Li Junfei Tian Wei Shen |
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Institution: | (1) Department of Chemical Engineering, Australian Pulp and Paper Institute, Monash University, Clayton Campus, Melbourne, VIC, 3800, Australia; |
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Abstract: | In this paper, we report the progress in using paper sizing chemistry to fabricate patterned paper for chemical and biological
sensing applications. Patterned paper sizing uses paper sizing agents to selectively hydrophobize certain area of a sheet.
The hydrophilic-hydrophobic contrast of the pattern so created has an excellent ability to control capillary penetration of
aqueous liquids in channels of the pattern. Incorporating this idea with digital ink jet printing technique, a new fabrication
method of paper-based microfluidic devices is established. Ink jet printing can deliver biomolecules and chemicals with precision
into the microfluidic patterns to form biological/chemical sensing sites within the patterns, forming the complete sensing
devices. This study shows the potential of combining paper sizing chemistry and ink jet printing to produce paper-based sensors
at low cost and at commercial volume. |
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