TY - JOUR
T1 - Highly Responsive and Robust Micro-/Nano-Textured Self-Powered Triboelectric Humidity Sensor
AU - Rasel, Mohammad Salauddin
AU - Maharjan, Pukar
AU - Rahman, Mohammad Toyabur
AU - Salauddin, Md
AU - Rana, S. M.Sohel
AU - Lee, Sanghyun
AU - Park, Jae Yeong
N1 - Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/10/26
Y1 - 2021/10/26
N2 - Most advanced humidity sensors of present days are based on the techniques dependent on the external power supplies that require periodic charging and replacement, causing additional cost and complicated management issues to the humidity-sensing systems. In this work, this problem has been overcome through a fundamental approach based on triboelectric contact electrification between a pair of the as-fabricated highly functional materials. The concept of self-powered humidity detection with an ultrafast response and relaxation times has been successfully demonstrated by introducing a triboelectric humidity sensor (TEHS) based on hydrophobic micro-/nano-textured polydimethylsiloxane and nano-textured aluminum films. The proposed humidity sensor produces an electric output for an external mechanical force that is readily related to the relative humidity (% RH) level over a wide range of ambient conditions. The as-fabricated TEHS device shows a record-fast response time and a relaxation time of 2.2 s and 1.9 s, respectively, and has very good linearity in electric output performance in a wide humidity detection range of 10-90% RH. The proposed device possesses a highly reliable/stable output performance, which is essentially constant over thousands of contact-separation stability test cycles. Moreover, in comparison to a battery-powered commercial humidity sensor adopted in this work, the self-powered TEHS device shows a significantly better performance in terms of response time and relaxation time. Therefore, this work paves the way toward the practical implementation of the triboelectric effect-enabled self-powered humidity sensors.
AB - Most advanced humidity sensors of present days are based on the techniques dependent on the external power supplies that require periodic charging and replacement, causing additional cost and complicated management issues to the humidity-sensing systems. In this work, this problem has been overcome through a fundamental approach based on triboelectric contact electrification between a pair of the as-fabricated highly functional materials. The concept of self-powered humidity detection with an ultrafast response and relaxation times has been successfully demonstrated by introducing a triboelectric humidity sensor (TEHS) based on hydrophobic micro-/nano-textured polydimethylsiloxane and nano-textured aluminum films. The proposed humidity sensor produces an electric output for an external mechanical force that is readily related to the relative humidity (% RH) level over a wide range of ambient conditions. The as-fabricated TEHS device shows a record-fast response time and a relaxation time of 2.2 s and 1.9 s, respectively, and has very good linearity in electric output performance in a wide humidity detection range of 10-90% RH. The proposed device possesses a highly reliable/stable output performance, which is essentially constant over thousands of contact-separation stability test cycles. Moreover, in comparison to a battery-powered commercial humidity sensor adopted in this work, the self-powered TEHS device shows a significantly better performance in terms of response time and relaxation time. Therefore, this work paves the way toward the practical implementation of the triboelectric effect-enabled self-powered humidity sensors.
KW - humidity sensor
KW - micro-/nanotextures
KW - relaxation time
KW - response time
KW - self-powered
KW - triboelectric effect
UR - http://www.scopus.com/inward/record.url?scp=85116680100&partnerID=8YFLogxK
U2 - 10.1021/acsaelm.1c00552
DO - 10.1021/acsaelm.1c00552
M3 - Article
AN - SCOPUS:85116680100
SN - 2637-6113
VL - 3
SP - 4376
EP - 4387
JO - ACS Applied Electronic Materials
JF - ACS Applied Electronic Materials
IS - 10
ER -