Impact of MWCNT concentration on the piezo-impedance response of porous MWCNT/PDMS composites

Title
Impact of MWCNT concentration on the piezo-impedance response of porous MWCNT/PDMS composites
Authors
전대영주용호Seok Ju LimHyun Su Lim
Keywords
Porous MWCNT/PDMS composite; Impedance analysis; Physical sensors; MWCNT concentration; Impedance sensing method
Issue Date
2020-11
Publisher
Sensors and actuators. A, Physical
Citation
VOL 315, 112332
Abstract
Carbon nanotube (CNT) based physical sensors with high performance have been successfully applied to novel devices for human motion detection and healthcare monitoring. Here, porous multi-walled carbon nanotube/polydimethylsiloxane MWCNT/PDMS composites with different MWCNT contents were fabricated via the water-oil emulsion state, and their impedance characteristics were investigated in detail. Intermediate MWCNT content induced both resistive and capacitive properties in the composites, while the composite with the highest MWCNT concentration showed resistive-dominant properties. In addition, an excellent piezo-impedance physical sensor using the MWCNT-loaded composites was demonstrated using an improved impedance sensing method. This work provides key information for realizing practical applications of MWCNT/PDMS composites.
URI
http://pubs.kist.re.kr/handle/201004/71866
ISSN
0924-4247
Appears in Collections:
KIST Publication > Article
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