Self-powered user-interactive displays that facilitate the visualization of human information acquired by sensors are of great interest in emerging human–machine interface technology with efficient energy consumption. Herein, a self-powered motion-sensing display capable of simultaneously detecting and visualizing finger motions is presented. Our device is based on a one-dimensional photonic crystal of an interpenetrated hydrogel network block copolymer (IHN-BCP) consisting of alternating water-absorbable and non-absorbable lamellae. Triboelectrification is achieved as a function of relative humidity from 30% to 80%. The direct visualization of the humidity is also achieved through the humidity-dependent structural color of the photonic crystal in the full visible range. Furthermore, the humidity-responsive triboelectrification and structural color of our IHN-BCP photonic crystal facilitates the development of a self-powered finger motion-sensing display where diverse gestures of a finger with natural humidity are quantitatively recognized, such as vertical and sliding motion of the finger with simultaneous visualization of the motions in both contact and non-contact modes.
|Publication status||Published - 2022 Feb|
Bibliographical noteFunding Information:
T.K. and J.W.L. contributed equally to this work. This research was supported by the National Research Foundation (NRF) of Korea as a Creative Materials Discovery Program funded by the Ministry of Science and ICT (Grant No. NRF-2018M3D1A1058536 ), and the Korean government (MEST) (Grant No. 2020R1A2B5B03002697 ). This research was also supported by Korea Initiative for fostering University of Research and Innovation Program of the National Research Foundation (NRF) funded by the Korean government (MSIT) (No. NRF-2020M3H1A1077207 ) and KIST Institutional Program (project no. 2Z05900–19-P096 ).
© 2021 Elsevier Ltd
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Electrical and Electronic Engineering