Journal
CHEMICAL PHYSICS LETTERS
Volume 505, Issue 1-3, Pages 31-36Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2011.02.005
Keywords
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Funding
- AFOSR [FA9550-05-C-0088]
- Office of Naval Research MURI [N00014-08-1-0654]
- Robert A. Welch Foundation [AT-0029]
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Graphene oxide nanoribbons (GOr), obtained by chemically unzipping multi-walled carbon nanotubes, were assembled into macroscopic mats by vacuum filtration. These mats exhibited up to 1.6% reversible contraction when electrically heated at ambient. The experimentally derived work capacity of the mats was about 40 J/kg, which is similar to that of natural muscle. It was limited by the mechanical strength of mats and can be increased upon optimization of their preparation conditions. X-ray diffraction measurements indicated reversible changes in the interplanar spacing of GOr layers during heating. These dimensional changes can be associated with reversible adsorption/desorption of water molecules between GOr layers and used in thermally-driven high performance artificial muscles and moisture sensors. Published by Elsevier B.V.
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