한빛사논문
Seonggwang Yoo1,11, Tianyu Yang1,2,11, Minsu Park1, Hyoyoung Jeong1,3, Young Joong Lee1, Donghwi Cho1,4, Joohee Kim1,5, Sung Soo Kwak1,5, Jaeho Shin1, Yoonseok Park6, Yue Wang1,7, Nenad Miljkovic2, William P. King2 & John A. Rogers1,7,8,9,10
1Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA.
2Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
3Department of Electrical and Computer Engineering, University of California, Davis, CA 95616, USA.
4Thin Film Materials Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
5Bionics Research Center of Biomedical Research Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
6Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, Yongin 17104, Republic of Korea.
7Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA.
8Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA.
9Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.
10Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
11These authors contributed equally: Seonggwang Yoo, Tianyu Yang.
Corresponding authors : Correspondence to William P. King or John A. Rogers.
Abstract
Soft, wireless physiological sensors that gently adhere to the skin are capable of continuous clinical-grade health monitoring in hospital and/or home settings, of particular value to critically ill infants and other vulnerable patients, but they present risks for injury upon thermal failure. This paper introduces an active materials approach that automatically minimizes such risks, to complement traditional schemes that rely on integrated sensors and electronic control circuits. The strategy exploits thin, flexible bladders that contain small volumes of liquid with boiling points a few degrees above body temperature. When the heat exceeds the safe range, vaporization rapidly forms highly effective, thermally insulating structures and delaminates the device from the skin, thereby eliminating any danger to the skin. Experimental and computational thermomechanical studies and demonstrations in a skin-interfaced mechano-acoustic sensor illustrate the effectiveness of this simple thermal safety system and suggest its applicability to nearly any class of skin-integrated device technology.
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