Self-powered image array composed of touch-free sensors fabricated with semiconductor nanowires

Authors
Han, SangmoonLee, Seoung-KiKim, Jong-WoongBae, SukangBae, Sang-HoonChoi, Kwang-HunKim, Jin Soo
Issue Date
2022-10
Publisher
Royal Society of Chemistry
Citation
Materials Horizons, v.9, no.11, pp.2846 - 2853
Abstract
We successfully develop a self-powered image array (IA) composed of 16 touch-free sensors (TFSs) fabricated with semiconductor InN nanowires (NWs) as a response medium. Without using a power supply, the InN-NW TFS can detect the position of a human hand 30 cm away from the device surface. It also distinguishes different materials such as polyimide, Al foil, printing paper, latex, and polyvinyl chloride in non-contact mode at a distance of 1 cm. The self-powered TFS-IA clearly distinguishes square-shaped transparent polydimethylsiloxane film attached to the back of a human hand positioned 5 cm from the device, indicating the possibility for detecting changes in the surface texture of human skin, such as skin burns or skin cancer. The performance of the self-powered TFS and TFS-IA is attributed to high electrostatic induction of InN NWs by external triboelectricity resulting from the simple movement of the target object, which differs markedly from conventional sensors designed to detect variations in the temperature or light essentially using a power supply.
Keywords
TRIBOELECTRIC NANOGENERATOR; POLARIZATION; SKIN
ISSN
2051-6347
URI
https://pubs.kist.re.kr/handle/201004/114505
DOI
10.1039/d2mh00692h
Appears in Collections:
KIST Article > 2022
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