Next Article in Journal
Short-Range Six-Axis Interferometer Controlled Positioning for Scanning Probe Microscopy
Previous Article in Journal
NodePM: A Remote Monitoring Alert System for Energy Consumption Using Probabilistic Techniques
Sensors 2014, 14(1), 868-876; doi:10.3390/s140100868
Article

Stretchable and Flexible High-Strain Sensors Made Using Carbon Nanotubes and Graphite Films on Natural Rubber

,
 and
*
Materials Science Research Center, Department of Physics and Materials Science, Faculty of Science, Chiangmai University, Chiangmai 50200, Thailand
* Author to whom correspondence should be addressed.
Received: 12 November 2013 / Revised: 23 December 2013 / Accepted: 24 December 2013 / Published: 6 January 2014
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [928 KB, uploaded 21 June 2014]   |  

Abstract

Conventional metallic strain sensors are flexible, but they can sustain maximum strains of only ~5%, so there is a need for sensors that can bear high strains for multifunctional applications. In this study, we report stretchable and flexible high-strain sensors that consist of entangled and randomly distributed multiwall carbon nanotubes or graphite flakes on a natural rubber substrate. Carbon nanotubes/graphite flakes were sandwiched in natural rubber to produce these high-strain sensors. Using field emission scanning electron microscopy, the morphology of the films for both the carbon nanotube and graphite sensors were assessed under different strain conditions (0% and 400% strain). As the strain was increased, the films fractured, resulting in an increase in the electrical resistance of the sensor; this change was reversible. Strains of up to 246% (graphite sensor) and 620% (carbon nanotube sensor) were measured; these values are respectively ~50 and ~120 times greater than those of conventional metallic strain sensors.
Keywords: piezoresistive sensor; soft wearable sensors; electro-mechanical properties; film composite; stretchable device; carbon nanotubes; health monitoring piezoresistive sensor; soft wearable sensors; electro-mechanical properties; film composite; stretchable device; carbon nanotubes; health monitoring
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Supplementary material

SciFeed

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Tadakaluru, S.; Thongsuwan, W.; Singjai, P. Stretchable and Flexible High-Strain Sensors Made Using Carbon Nanotubes and Graphite Films on Natural Rubber. Sensors 2014, 14, 868-876.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert