Formation of wrinkles on the surface of PDMS elastomer film using copper nanowire network

• 1、State Key Laboratory of Information Photonics Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China

Abstract：In recent years, flexible electronic devices have been developing rapidly, and the fabrication of micro-nano patterns by using flexible materials has become an important step in the fabrication of electronic devices. In this paper, polydimethylsiloxane (PDMS) elastic thin films were wrinkled by using copper-nanowire-network. The nanowire network was formed on the slide. The nanowires in the nanowire network were crisscrossed and overlapped, and there were spaces between the nanowires. The uncured and flowing PDMS were filled into the void of nanowire network, wrapped nanowires and attached to the slide to control the curing conditions of PDMS. After the completion of PDMS curing, PDMS was removed from the slide. Finally, PDMS obtained different wrinkle structures on the side attached to the slide. This method does not need complicated processes and equipment, is easy to operate, low cost and has good repeatability. At the same time, the wrinkle structures prepared on PDMS may be applied to flexible electronic wearable devices or sensors, implantable devices, touch screens, and intelligent perception.

Keywords： copper nanowire network PDMS flexibility wrinkles