期刊
LAB ON A CHIP
卷 12, 期 22, 页码 4657-4664出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2lc40628d
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资金
- Swedish Governmental Agency for Innovation Systems, through Uppsala Vinnova Excellence Center for Wireless Sensor Networks
- Swedish Research Council [621-2010-5443]
Recently, microfluidic stretchable electronics has attracted great interest from academia since conductive liquids allow for larger cross-sections when stretched and hence low resistance at longer lengths. However, as a serial process it has suffered from low throughput, and a parallel processing technology is needed for more complex systems and production at low costs. In this work, we demonstrate such a technology to implement microfluidic electronics by stencil printing of a liquid alloy onto a semi-cured polydimethylsiloxane (PDMS) substrate, assembly of rigid active components, encapsulation by pouring uncured PDMS on-top and subsequent curing. The printing showed resolution of 200 mu m and linear resistance increase of the liquid conductors when elongated up to 60%. No significant change of resistance was shown for a circuit with one LED after 1000 times of cycling between a 0% and an elongation of 60% every 2 s. A radio frequency identity (RFID) tag was demonstrated using the developed technology, showing that good performance could be maintained well into the radio frequency (RF) range.
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