Flexible piezotronic strain sensor

Nano Letters
Jun ZhouZhong Lin Wang

Abstract

Strain sensors based on individual ZnO piezoelectric fine-wires (PFWs; nanowires, microwires) have been fabricated by a simple, reliable, and cost-effective technique. The electromechanical sensor device consists of a single electrically connected PFW that is placed on the outer surface of a flexible polystyrene (PS) substrate and bonded at its two ends. The entire device is fully packaged by a polydimethylsiloxane (PDMS) thin layer. The PFW has Schottky contacts at its two ends but with distinctly different barrier heights. The I- V characteristic is highly sensitive to strain mainly due to the change in Schottky barrier height (SBH), which scales linear with strain. The change in SBH is suggested owing to the strain induced band structure change and piezoelectric effect. The experimental data can be well-described by the thermionic emission-diffusion model. A gauge factor of as high as 1250 has been demonstrated, which is 25% higher than the best gauge factor demonstrated for carbon nanotubes. The strain sensor developed here has applications in strain and stress measurements in cell biology, biomedical sciences, MEMS devices, structure monitoring, and more.

References

Mar 10, 2001·Science·Z W PanZ L Wang
Jun 9, 2001·Science·M H HuangP Yang
May 17, 2005·Nature Materials·Matt LawPeidong Yang
Feb 9, 2006·Nano Letters·C StampferC Hierold
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Citations

Jun 18, 2011·ACS Applied Materials & Interfaces·B RadhaG U Kulkarni
Dec 20, 2012·ACS Applied Materials & Interfaces·John W Durham, Yong Zhu
May 3, 2013·Nano Letters·Ken C PradelZhong Lin Wang
Oct 1, 2013·Nano Letters·Youfan HuZhong Lin Wang
Oct 22, 2011·ACS Nano·Hak Ki YuJong-Lam Lee
Apr 10, 2012·ACS Nano·Jyh Ming WuZhong Lin Wang
Jan 3, 2009·Nature Nanotechnology·Rusen YangZhong Lin Wang
Feb 14, 2009·Chemical Communications : Chem Comm·Chengxiang XiangReginald M Penner
Jun 30, 2011·Nanoscale Research Letters·Jianbo Yin, Xiaopeng Zhao
Jun 21, 2012·Nanoscale Research Letters·Zhi LiYang Wang
Oct 5, 2013·The Journal of Chemical Physics·Zhunzhun WangJinlong Yang
Jan 7, 2014·Nanoscale Research Letters·Byung Kil YunJong Hoon Jung
Feb 6, 2014·Nature Communications·Shu GongWenlong Cheng
Sep 18, 2015·Sensors·Kory JenkinsRusen Yang
Jan 23, 2015·Critical Reviews in Biotechnology·Shengbo SangWendong Zhang
Dec 26, 2015·ACS Applied Materials & Interfaces·Yang ZhangZhong Lin Wang
Aug 15, 2014·ACS Nano·Chi ZhangZhong Lin Wang
Sep 15, 2015·ACS Nano·Ruomeng YuZhong Lin Wang
May 20, 2015·Scientific Reports·Yong-Jae KimJae-il Jang
Nov 20, 2012·Scientific Reports·Xiao LiHongwei Zhu
May 15, 2015·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Michael HofstätterPeter Supancic
Aug 11, 2015·Nature Communications·Abdul TalukdarGoutam Koley
Apr 5, 2014·ACS Applied Materials & Interfaces·Fei XueZhong Lin Wang
May 1, 2009·Journal of the American Chemical Society·Sheng XuZhong Lin Wang

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