Chip-less wireless electronic skins by remote epitaxial freestanding compound semiconductors. uri icon

abstract

  • Recent advances in flexible and stretchable electronics have led to a surge of electronic skin (e-skin)-based health monitoring platforms. Conventional wireless e-skins rely on rigid integrated circuit chips that compromise the overall flexibility and consume considerable power. Chip-less wireless e-skins based on inductor-capacitor resonators are limited to mechanical sensors with low sensitivities. We report a chip-less wireless e-skin based on surface acoustic wave sensors made of freestanding ultrathin single-crystalline piezoelectric gallium nitride membranes. Surface acoustic wave-based e-skin offers highly sensitive, low-power, and long-term sensing of strain, ultraviolet light, and ion concentrations in sweat. We demonstrate weeklong monitoring of pulse. These results present routes to inexpensive and versatile low-power, high-sensitivity platforms for wireless health monitoring devices.

published proceedings

  • Science

author list (cited authors)

  • Kim, Y., Suh, J. M., Shin, J., Liu, Y., Yeon, H., Qiao, K., ... Kim, J.

complete list of authors

  • Kim, Yeongin||Suh, Jun Min||Shin, Jiho||Liu, Yunpeng||Yeon, Hanwool||Qiao, Kuan||Kum, Hyun S||Kim, Chansoo||Lee, Han Eol||Choi, Chanyeol||Kim, Hyunseok||Lee, Doyoon||Lee, Jaeyong||Kang, Ji-Hoon||Park, Bo-In||Kang, Sungsu||Kim, Jihoon||Kim, Sungkyu||Perozek, Joshua A||Wang, Kejia||Park, Yongmo||Kishen, Kumar||Kong, Lingping||Palacios, Tomás||Park, Jungwon||Park, Min-Chul||Kim, Hyung-Jun||Lee, Yun Seog||Lee, Kyusang||Bae, Sang-Hoon||Kong, Wei||Han, Jiyeon||Kim, Jeehwan