Journal
NANO LETTERS
Volume 12, Issue 4, Pages 1821-1825Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl204052z
Keywords
Nanotubes percolation; sensor; strain; elastomer
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Funding
- National Defense Science and Engineering graduate fellowship (NDSEG)
- National Science Foundation
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We present a highly elastic strain gauge based on capacitive sensing of parallel, carbon nanotube-based percolation electrodes separated by a dielectric elastomer. The fabrication, relying on vacuum filtration of single-walled carbon nanotubes and hydrophobic patterning of silicone, is both rapid and inexpensive. We demonstrate reliable, linear performance over thousands of cycles at up to 100% strain with less than 3% variability and the highest reported gauge factor for a device of this class (0.99). We further demonstrate use of this sensor in a robotics context to transduce joint angles.
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