Abstract
Paper microfluidics and printed electronics have developed independently, and are incompatible in many aspects. Monolithic integration of microfluidics and electronics on paper is demonstrated. This integration makes it possible to print 2D and 3D fluidic, electrofluidic, and electrical components on paper, and to fabricate devices using them.
Highlights
The majority of μTAS are constructed by stacking electronic structures, and microfluidic structures.[1]
In one widely used approach to paper microfluidics hydrophobic barriers are patterned into paper[14],[15] − usually using wax printing − to direct the flow of fluids by capillary wicking.[16]
Functional structures are printed on the surface of the paper, while in paper microfluidics, structures are created in the interior of the paper substrate
Summary
In more detail: the procedure for co-fabrication starts with a channel formed by printing of wax, and melting it into the paper.[16] The channels can define either fluidic or electronic structures (Figure 1B). The inks were added to the wax-defined channels that had been designed to become electrically conducting wires, and spread by wicking to cover the entire hydrophilic area of the paper.
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