Han, Sangmoon Lee, Seoung-Ki Kim, Jong-Woong Bae, Sukang Bae, Sang-Hoon Choi, Kwang-Hun Kim, Jin Soo 2024-01-19T11:02:32Z 2024-01-19T11:02:32Z 2022-09-15 2022-10 2051-6347 https://pubs.kist.re.kr/handle/201004/114505 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. English Royal Society of Chemistry Self-powered image array composed of touch-free sensors fabricated with semiconductor nanowires Article 10.1039/d2mh00692h 1 Materials Horizons, v.9, no.11, pp.2846 - 2853 Materials Horizons 9 11 2846 2853 N scie scopus 000848757700001 Chemistry, Multidisciplinary Materials Science, Multidisciplinary Chemistry Materials Science Article TRIBOELECTRIC NANOGENERATOR POLARIZATION SKIN