Kim, Taebin Lee, Jae Won Park, Chanho Lee, Kyuho Lee, Chang Eun Lee, Seokyeong Kim, Yeonji Kim, Sohee Jeon, Seungbae Ryu, Du Yeol Koh, Won-Gun Park, Cheolmin 2024-01-19T12:34:00Z 2024-01-19T12:34:00Z 2022-04-03 2022-02 2211-2855 https://pubs.kist.re.kr/handle/201004/115676 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. English ELSEVIER Self-powered finger motion-sensing structural color display enabled by block copolymer photonic crystal Article 10.1016/j.nanoen.2021.106688 1 NANO ENERGY, v.92 NANO ENERGY 92 N scie scopus 000726613000002 2-s2.0-85119932160 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article TRIBOELECTRIC NANOGENERATOR NONCONTACT MODE TRANSPARENT SENSOR ENERGY Human-machine interfaces Finger motion-sensing display Block copolymer photonic crystal Humidity-dependent structural color display Triboelectric motion sensing Self-powered operation