TY - JOUR
T1 - Fully printed all-resistive dual-mode sensor with ultra-low temperature coefficient of resistance for crosstalk-free detections of pressure and humidity
AU - Ma, Hongliang
AU - Si, Fangcheng
AU - He, Chang
AU - Wang, Xinyu
AU - Ding, Jie
AU - Zhang, Wendong
AU - Fan, Xuge
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/2/1
Y1 - 2025/2/1
N2 - Humidity-pressure dual-mode sensor has attracted much attention for its promising applications in health monitoring, human- machine interaction (HMI), and aerospace. Nevertheless, it is still a great challenge to realize humidity-pressure dual-mode sensors without temperature interference on flexible substrate by a simple and fast method. Here, a fully screen-printed flexible humidity-pressure dual-mode sensor is prepared by using multi-walled carbon nanotubes (MWCNTs) as conductive fillers and graphene oxide (GO) and ethyl cellulose (EC) as binders. The prepared dual-mode sensor not only exhibits an ultra-low temperature coefficient of resistance (TCR = 0.182 %°C−1), excellent decoupling capability, good humidity responsivity (35.92 %, −ΔI/I0), wide humidity detection range (22–92 % RH), and fast humidity response/recovery time (52.19/47.55 s), but also shows high pressure cycling stability (1200 cycles), good pressure sensitivity (S = −1.582 % kPa−1) as well as fast pressure response time (82.7 ms). Furthermore, the independent sensing unit of the dual-mode sensor can be flexibly extended into the array for dual-terminal sensing without temperature interference. The results demonstrate that the dual-mode sensor has superior sensing performance and decoupling capability and shows great potential in multifunctional simultaneous sensing scenarios.
AB - Humidity-pressure dual-mode sensor has attracted much attention for its promising applications in health monitoring, human- machine interaction (HMI), and aerospace. Nevertheless, it is still a great challenge to realize humidity-pressure dual-mode sensors without temperature interference on flexible substrate by a simple and fast method. Here, a fully screen-printed flexible humidity-pressure dual-mode sensor is prepared by using multi-walled carbon nanotubes (MWCNTs) as conductive fillers and graphene oxide (GO) and ethyl cellulose (EC) as binders. The prepared dual-mode sensor not only exhibits an ultra-low temperature coefficient of resistance (TCR = 0.182 %°C−1), excellent decoupling capability, good humidity responsivity (35.92 %, −ΔI/I0), wide humidity detection range (22–92 % RH), and fast humidity response/recovery time (52.19/47.55 s), but also shows high pressure cycling stability (1200 cycles), good pressure sensitivity (S = −1.582 % kPa−1) as well as fast pressure response time (82.7 ms). Furthermore, the independent sensing unit of the dual-mode sensor can be flexibly extended into the array for dual-terminal sensing without temperature interference. The results demonstrate that the dual-mode sensor has superior sensing performance and decoupling capability and shows great potential in multifunctional simultaneous sensing scenarios.
KW - Carbon nanotubes
KW - Conductive inks
KW - Graphene oxide
KW - Humidity-pressure dual-mode sensors
KW - Sensor arrays
UR - http://www.scopus.com/inward/record.url?scp=85214556385&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2025.159394
DO - 10.1016/j.cej.2025.159394
M3 - Article
AN - SCOPUS:85214556385
SN - 1385-8947
VL - 505
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 159394
ER -