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Omni-purpose stretchable strain sensor based on a highly dense nanocracking structure for whole-body motion monitoring

Title
Omni-purpose stretchable strain sensor based on a highly dense nanocracking structure for whole-body motion monitoring
Authors
JEON, HYUNG KOOKHONG, SEONG KYUNGKIM, MIN SEOCHO, SEONG JINLIM, GEUNBAE
POSTECH Authors
LIM, GEUNBAE
Date Issued
Nov-2017
Publisher
ACS
Abstract
Here, we report an omni-purpose stretchable strain sensor (OPSS sensor) based on a nanocracking structure for monitoring whole-body motions including both joint-level and skin-level motions. By controlling and optimizing the nanocracking structure, inspired by the spider sensory system, the OPSS sensor is endowed with both high sensitivity (gauge factor ≈ 30) and a wide working range (strain up to 150%) under great linearity (R2 = 0.9814) and fast response time (<30 ms). Furthermore, the fabrication process of the OPSS sensor has advantages of being extremely simple, patternable, integrated circuit-compatible, and reliable in terms of reproducibility. Using the OPSS sensor, we detected various human body motions including both moving of joints and subtle deforming of skin such as pulsation. As specific medical applications of the sensor, we also successfully developed a glove-type hand motion detector and a real-time Morse code communication system for patients with general paralysis. Therefore, considering the outstanding sensing performances, great advantages of the fabrication process, and successful results from a variety of practical applications, we believe that the OPSS sensor is a highly suitable strain sensor for whole-body motion monitoring and has potential for a wide range of applications, such as medical robotics and wearable healthcare devices.
Keywords
crack-based sensor; highly dense nanocracking structure; stretchable strain sensor; wearable healthcare device; whole-body motion monitoring
URI
http://oasis.postech.ac.kr/handle/2014.oak/38963
DOI
10.1021/acsami.7b14153
ISSN
1944-8244
Article Type
Article
Citation
ACS Applied Materials & Interfaces, vol. 9, no. 48, page. 41712 - 41721, 2017-11
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 LIM, GEUNBAE
Dept of Mechanical Enginrg
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