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Published in:
11-12-2015
Flexible conductor fabrication via silver nanowire deposition on a polydopamine-modified pre-strained substrate
Published in: Journal of Materials Science: Materials in Electronics | Issue 4/2016
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Abstract
We fabricated a flexible conductor by depositing silver nanowires (AgNWs) on the surface of pre-strained polydopamine-modified polyurethane (PU) film. The polydopamine layer on the PU film created a highly hydrophilic surface that enhanced AgNWs adhesion to the PU film. When the pre-strained film was released, the PU film surfaces formed a uniformly buckled conductive layer. After embedding this substrate in polydimethylsiloxane (PDMS), a PU/AgNWs/PDMS flexible conductor was obtained. This flexible conductor can adapt to stretching (up to 20 % strain) and bending (3 mm bending radius) with slight changes in resistance, which was maintained at ~0.95 Ω after 1000 cycle tests. The resistance of the flexible conductor was 5.4 Ω under mechanical elongation of up to ~50 %, further demonstrating its obvious stretchable characteristics. Wavy AgNWs film-based stretchable conductors fabricated using a simple buckling approach could play an important role in the future development of flexible electronics.