Issue 11, 2022

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

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.

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

Supplementary files

Article information

Article type
Communication
Submitted
03 Jun 2022
Accepted
12 Aug 2022
First published
13 Aug 2022

Mater. Horiz., 2022,9, 2846-2853

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

S. Han, S. Lee, J. Kim, S. Bae, S. Bae, K. Choi and J. S. Kim, Mater. Horiz., 2022, 9, 2846 DOI: 10.1039/D2MH00692H

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