期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 18, 页码 11868-11874出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b02844
关键词
adhesion; stretchable electronics; conductive thin film; PDMS; atmospheric plasma treatment; flexible printed electronics
资金
- Ministry of Science and Technology (MOST) in Taiwan
In this study, a plasma surface modification with printing process was developed to fabricate printed flexible conductor patterns or devices directly on polydimethylsiloxane (PDMS) surface. An atmospheric plasma treatment was first used to oxidize the PDMS surface and create a hydrophilic silica surface layer, which was confirmed with photoelectron spectra. The plasma operating parameters, such as gas types and plasma powers, were optimized to obtain surface silica layers with the longest lifetime. Conductive paste with epoxy resin was screen-printed on the plasma-treated PDMS surface to fabricate flexible conductive tracks. As a result of the strong binding forces between epoxy resin and the silica surface layer, the printed patterns showed great adhesion on PDMS and were undamaged after several stringent adhesion tests. The printed conductive tracks showed strong mechanical stability and exhibited great electric conductivity under bending, twisting, and stretching conditions. Finally, a printed pressure sensor with good sensitivity and a fast response time was fabricated to demonstrate the capability of this method for the realization of printed electronic devices.
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