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.
Original language | English |
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Pages (from-to) | 859-864 |
Number of pages | 6 |
Journal | Science |
Volume | 377 |
Issue number | 6608 |
DOIs | |
Publication status | Published - 2022 Aug 19 |
Bibliographical note
Funding Information:We thank M. R. Abdelhamid and A. P. Chandrakasan for allowing us to use their vector network analyzer. This work was supported by AMOREPACIFIC.
Publisher Copyright:
© 2022 American Association for the Advancement of Science. All rights reserved.
All Science Journal Classification (ASJC) codes
- General