TY - JOUR
T1 - A Wireless Wearable Sensor System Based on a Silver Nanowire-Decorated Silicon Nanomembrane for Precise and Continuous Hazardous Gas Monitoring
AU - Shin, Jongwoon
AU - Kim, Kyubeen
AU - Min, In Sik
AU - Sang, Mingyu
AU - Lee, Ju Young
AU - Hwang, Kyuhyun
AU - Kang, Yunsung
AU - Kim, Jongbaeg
AU - Yu, Ki Jun
N1 - Publisher Copyright:
© 2024 The Author(s). Advanced Functional Materials published by Wiley-VCH GmbH.
PY - 2024
Y1 - 2024
N2 - Wearable wireless gas sensors have attracted enormous interest due to precise, real-time healthcare and environmental monitoring without temporal and spatial limitations. Among various toxic gases, detecting ammonia is crucial because of its highly hazardous nature and applicability as a noninvasive biomarker for diagnosing health conditions. In this study, silver nanowires-decorated silicon nanomembrane (AgNW-SiNM) chemiresistive gas sensor with high selectivity to ammonia is fully integrated with an ultrathin flexible Joule heater and wireless communication system to fabricate wearable wireless real-time toxic gas monitoring system. The sensor exhibits improved performance to ammonia gas, attributed to heating-induced changes in adsorption/desorption rates, along with electronic and chemical sensitization facilitated by AgNW decoration. The gas sensing system exhibits stable and high responses of ≈1.83, 1.47, and 1.19 on the ammonia exposure at concentrations of 10, 5, and 1 ppm even under mechanical deformations. The real-time dynamic response of the sensor is wirelessly transmitted to portable electronics and displayed on the screen. Moreover, the system alerts the users in advance through the integrated haptic interface when exposed to dangerous gas environments for early evacuation. The system paves the way for timely warnings from hazardous gas and more accurate noninvasive medical diagnosis related to respiratory disorders.
AB - Wearable wireless gas sensors have attracted enormous interest due to precise, real-time healthcare and environmental monitoring without temporal and spatial limitations. Among various toxic gases, detecting ammonia is crucial because of its highly hazardous nature and applicability as a noninvasive biomarker for diagnosing health conditions. In this study, silver nanowires-decorated silicon nanomembrane (AgNW-SiNM) chemiresistive gas sensor with high selectivity to ammonia is fully integrated with an ultrathin flexible Joule heater and wireless communication system to fabricate wearable wireless real-time toxic gas monitoring system. The sensor exhibits improved performance to ammonia gas, attributed to heating-induced changes in adsorption/desorption rates, along with electronic and chemical sensitization facilitated by AgNW decoration. The gas sensing system exhibits stable and high responses of ≈1.83, 1.47, and 1.19 on the ammonia exposure at concentrations of 10, 5, and 1 ppm even under mechanical deformations. The real-time dynamic response of the sensor is wirelessly transmitted to portable electronics and displayed on the screen. Moreover, the system alerts the users in advance through the integrated haptic interface when exposed to dangerous gas environments for early evacuation. The system paves the way for timely warnings from hazardous gas and more accurate noninvasive medical diagnosis related to respiratory disorders.
KW - ammonia detection
KW - real-time monitoring
KW - silver nanowires-decorated silicon nanomembrane
KW - wearable wireless gas sensor
UR - http://www.scopus.com/inward/record.url?scp=85211484116&partnerID=8YFLogxK
U2 - 10.1002/adfm.202419110
DO - 10.1002/adfm.202419110
M3 - Article
AN - SCOPUS:85211484116
SN - 1616-301X
JO - Advanced Functional Materials
JF - Advanced Functional Materials
ER -