Flexible and Transparent Strain Sensors with Embedded Multiwalled Carbon Nanotubes Meshes

ACS Applied Materials & Interfaces
Bangbang NieBingheng Lu

Abstract

Strain sensors combining high sensitivity with good transparency and flexibility would be of great usefulness in smart wearable/flexible electronics. However, the fabrication of such strain sensors is still challenging. In this study, new strain sensors with embedded multiwalled carbon nanotubes (MWCNTs) meshes in polydimethylsiloxane (PDMS) films were designed and tested. The strain sensors showed elevated optical transparency of up to 87% and high sensitivity with a gauge factor of 1140 at a small strain of 8.75%. The gauge factors of the sensors were also found relatively stable since they did not obviously change after 2000 stretching/releasing cycles. The sensors were tested to detect motion in the human body, such as wrist bending, eye blinking, mouth phonation, and pulse, and the results were shown to be satisfactory. Furthermore, the fabrication of the strain sensor consisting of mechanically blading MWCNTs aqueous dispersions into microtrenches of prestructured PDMS films was straightforward, was low cost, and resulted in high yield. All these features testify to the great potential of these sensors in future real applications.

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Citations

May 30, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Jinwook JungSeung Hwan Ko
May 7, 2021·ACS Applied Materials & Interfaces·Zhenwei WangJianzhong Fu
Aug 14, 2020·ACS Applied Materials & Interfaces·Bangbang NieJinyou Shao
Aug 19, 2021·ACS Applied Materials & Interfaces·Bangbang NieJinyou Shao
Apr 23, 2019·ACS Applied Materials & Interfaces·Yongsong LuoBingheng Lu
Feb 27, 2020·ACS Applied Materials & Interfaces·Zijing SunQingxin Tang
Dec 12, 2018·ACS Applied Materials & Interfaces·Jia SongTianjiao Hu
Jun 5, 2018·ACS Applied Materials & Interfaces·Wenjing YuanFuxing Yin
Aug 31, 2021·ACS Applied Materials & Interfaces·Shuai LiJinyou Shao

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