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Issue 20, 2017
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Flexible and transparent strain sensors based on super-aligned carbon nanotube films

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Abstract

Highly flexible and transparent strain sensors are fabricated by directly coating super-aligned carbon nanotube (SACNT) films on polydimethylsiloxane (PDMS) substrates. The fabrication process is simple, low cost, and favorable for industrial scalability. The SACNT/PDMS strain sensors present a high sensing range of 400%, a fast response of less than 98 ms, and a low creep of 4% at 400% strain. The SACNT/PDMS strain sensors can withstand 5000 stretching–releasing cycles at 400% strain. Moreover, the SACNT/PDMS strain sensors are transparent with 80% transmittance at 550 nm. In situ microscopic observation clarifies that the surface morphology of the SACNT film exhibits a reversible change during the stretching and releasing processes and thus its electrical conductance is able to fully recover to the original value after the loading–unloading cycles. The SACNT/PDMS strain sensors have the advantages of a wide sensing range, fast response, low creep, transparency, and excellent durability, and thus show great potential in wearable devices to monitor fast and large-scale movements without affecting the appearance of the devices.

Graphical abstract: Flexible and transparent strain sensors based on super-aligned carbon nanotube films

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Supplementary files

Article information


Submitted
28 Dec 2016
Accepted
14 Apr 2017
First published
21 Apr 2017

Nanoscale, 2017,9, 6716-6723
Article type
Paper

Flexible and transparent strain sensors based on super-aligned carbon nanotube films

Y. Yu, Y. Luo, A. Guo, L. Yan, Y. Wu, K. Jiang, Q. Li, S. Fan and J. Wang, Nanoscale, 2017, 9, 6716
DOI: 10.1039/C6NR09961K

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