Journal
NANO LETTERS
Volume 14, Issue 6, Pages 3208-3213Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl5005652
Keywords
Contact electrification; self-powered electronics; tactile sensing; flexible electronics
Categories
Funding
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-FG02-07ER46394]
- thousands talents program for pioneer researcher and his innovation team, China, Beijing City Committee of Science and Technology projects [Z131100006013004, Z131100006013005]
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Tactile/touch sensing is essential in developing human-machine interfacing and electronic skins for areas such as automation, security, and medical care. Here, we report a self-powered triboelectric sensor based on flexible thin-film materials. It relies on contact electrification to generate a voltage signal in response to a physical contact without using an external power supply. Enabled by the unique sensing mechanism and surface modification by polymer-nanowires, the triboelectric sensor shows an exceptional pressure sensitivity of 44 mV/Pa (0.09% Pa-1) and a maximum touch sensitivity of 1.1 V/Pa (2.3% Pa-1) in the extremely low-pressure region (<0.15 KPa). Through integration of the sensor with a signal-processing circuit, a complete tactile sensing system is further developed. Diverse applications of the system are demonstrated, explicitly indicating a variety of immediate uses in human-electronics interface, automatic control, surveillance, remote operation, and security systems.
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