Abstract
| Original language | English |
|---|---|
| Journal | Sensors and Actuators, A: Physical |
| Volume | 342 |
| DOIs | |
| Publication status | Published - May 2022 |
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In: Sensors and Actuators, A: Physical, Vol. 342, 05.2022.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Ultra-sensitive flexible strain sensors based on hybrid conductive networks for monitoring human activities
AU - Lin, Yankun
AU - Yin, Qing
AU - Ding, Lifeng
AU - Yuan, Guoliang
AU - Jia, Hongbing
AU - Wang, Jingyi
PY - 2022/5
Y1 - 2022/5
N2 - Flexible strain sensors have aroused great interest because of their prospective applications in motion detection, healthcare, and wearable electronics. However, the construction of strain sensing materials with both ultra-high sensitivity and excellent stretchability via a facile and scalable strategy remains a challenge. Here, an ultra-sensitive and highly stretchable strain sensor with a unique hybrid conductive network was fabricated based on reduced graphene oxide (RGO)/multi-walled carbon nanotubes (MWCNT) hybrid fillers, carbonized woven fabric, and natural rubber (NR). The RGO/MWCNT/carbonized woven fabric (GMWF) composite was obtained by fast reduction of graphene oxide (GO)/acid-treated MWCNT (MWCNT-COOH) hybrid fillers and pyrolysis of woven fabric in an alcohol flame synchronously. The resulting GMWF/NR strain sensor exhibited a laudable trade-off between sensitivity and detection range (gauge factor of 1451, 3587, and 8225 within 0 ~ 32%, 32 ~ 49%, and 49 ~ 67% strain, respectively), fast response (200 ms), low detection limit (0.5%), and outstanding durability (1000 cycles). It could detect full-range (vigorous and subtle) human activities in real time. This integration of synergistic conductive fillers and facile template method to construct the hybrid conductive network demonstrates an effective strategy for fabricating high-performance strain sensors for wearable electronic devices.
AB - Flexible strain sensors have aroused great interest because of their prospective applications in motion detection, healthcare, and wearable electronics. However, the construction of strain sensing materials with both ultra-high sensitivity and excellent stretchability via a facile and scalable strategy remains a challenge. Here, an ultra-sensitive and highly stretchable strain sensor with a unique hybrid conductive network was fabricated based on reduced graphene oxide (RGO)/multi-walled carbon nanotubes (MWCNT) hybrid fillers, carbonized woven fabric, and natural rubber (NR). The RGO/MWCNT/carbonized woven fabric (GMWF) composite was obtained by fast reduction of graphene oxide (GO)/acid-treated MWCNT (MWCNT-COOH) hybrid fillers and pyrolysis of woven fabric in an alcohol flame synchronously. The resulting GMWF/NR strain sensor exhibited a laudable trade-off between sensitivity and detection range (gauge factor of 1451, 3587, and 8225 within 0 ~ 32%, 32 ~ 49%, and 49 ~ 67% strain, respectively), fast response (200 ms), low detection limit (0.5%), and outstanding durability (1000 cycles). It could detect full-range (vigorous and subtle) human activities in real time. This integration of synergistic conductive fillers and facile template method to construct the hybrid conductive network demonstrates an effective strategy for fabricating high-performance strain sensors for wearable electronic devices.
KW - Strain sensors
KW - Hybrid conductive network
KW - Reduced graphene oxide
KW - Multi-walled carbon nanotubes
KW - Ultra-sensitive
U2 - 10.1016/j.sna.2022.113627
DO - 10.1016/j.sna.2022.113627
M3 - Article
SN - 0924-4247
VL - 342
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
ER -