Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 16, Pages 19211-19220Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c22938
Keywords
piezoresistive sensor; pressure sensor; porous material; microstructure; flexible sensor
Funding
- key project of the Nature Science Foundation of Tianjin [20JCZDJC00350]
Ask authors/readers for more resources
A porous and microstructure piezoresistive material made of PDMS and MWCNTs was designed for a flexible and highly sensitive pressure sensor, showing high sensitivity response in a wide pressure range from 1 Pa to 100 kPa.
A porous and microstructure piezoresistive material composed of polydimethylsiloxane (PDMS) and multiwalled carbon nanotubes (MWCNTs) was designed and prepared for a flexible and highly sensitive pressure sensor over a wide detection range. The microstructure was patterned on the surface of the partially cured PDMS/MWCNTs/NaCl mixture by imprinting a nonwoven fabric. After curing and dissolving the NaCl powders, the porous and surface microstructure PDMS/MWCNT film was obtained. Two PDMS/MWCNT films were stacked together and sandwiched between two copper foil electrodes, in which the two microstructure surfaces were in contact with the electrodes. Due to the synergistic effects of the combination of the porous structure and surface microstructure, the flexible sensor had highly sensitive response over a wide pressure range from 1 Pa to 100 kPa. Under the small pressure, the high sensitivity was achieved by the change in contact areas between the electrodes and the surface microstructures; at high pressure up to 100 kPa, the sensor retained its high sensitivity because of the porous structure of the piezoresistive PDMS/MWCNT material. Additionally, the sensor had fast response speed and good durability. The piezoresistive pressure sensors based on the porous and microstructure PDMS/MWCNTs were demonstrated in detection of sound, monitoring of human activities, and array mapping of the spatial pressure distribution.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available