Resistive Pressure Sensor with Carbon Nanotube Electrodes towards Flexible Electronics Applications

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Here, we present a flexible and stretchable pressure sensor composed of vertically aligned CNTs (VACNTs) partially embedded in a polydimethylsiloxane (PDMS) substrate. VACNTs were grown via chemical vapor deposition and transferred onto PDMS as a stretchable electrode. Two such electrodes were placed face-to-face. Increased orthogonal pressure is directly proportional to a detectable change in resistance, enabled by increased contact between the opposing electrode surfaces. The measured resistance was maintained at stretching, demonstrating its ability to accommodate various mechanical disturbances such as large bending, twisting and stretching, while retaining its performance. This work will directly impact the development of pressure sensing devices toward medical and wearable electronics applications.

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Journal: TechConnect Briefs
Volume: TechConnect Briefs 2019
Published: June 17, 2019
Pages: 349 - 352
Industry sector: Sensors, MEMS, Electronics
Topics: Nanoelectronics, Sensors - Chemical, Physical & Bio
ISBN: 978-0-9988782-8-7