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. 2019 Jan 18;5(1):eaav3294. doi: 10.1126/sciadv.aav3294

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Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

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Fig. 1 — (A) Schematic illustrating the exploded view of the complete hybrid battery-free system. PI, polyimide; S.R., sweat rate. Close-up image of (B) microfluidic patch with embedded sensors and (C) battery-free NFC electronics. (D) Image illustrating the reversible magnetic attachment of the NFC electronics to the microfluidic patch. (E) Image of the complete system. (F) Image illustrating the device during sweating. (G) A phone interface that illustrates wireless communication and image acquisition. Photo credit: Philipp Gutruf, Northwestern University.