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Torsional Carbon Nanotube Artificial Muscles

Title
Torsional Carbon Nanotube Artificial Muscles
Author
김선정
Keywords
Biomimetic Materials; Electrodes; Electrolytes; Muscles; Nanotubes; Carbon; Rotation; Torque; Torsion; Mechanical
Issue Date
2011-10
Publisher
American Association for the Advancement of Science, 2011.
Citation
Science,Vol.334 No.6055 [2011],494-497
Abstract
Rotary motors of conventional design can be rather complex and are therefore difficult to miniaturize; previous carbon nanotube artificial muscles provide contraction and bending, but not rotation. We show that an electrolyte-filled twist-spun carbon nanotube yarn, much thinner than a human hair, functions as a torsional artificial muscle in a simple three-electrode electrochemical system, providing a reversible 15,000° rotation and 590 revolutions per minute. A hydrostatic actuation mechanism, as seen in muscular hydrostats in nature, explains the simultaneous occurrence of lengthwise contraction and torsional rotation during the yarn volume increase caused by electrochemical double-layer charge injection. The use of a torsional yarn muscle as a mixer for a fluidic chip is demonstrated.
URI
http://dx.doi.org/10.1126/science.1211220http://hdl.handle.net/20.500.11754/37135
ISSN
0036-8075; 1095-9203
DOI
10.1126/science.1211220
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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