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Torsional carbon nanotube artificial muscles

Journal Article


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.

Authors


  •   Oh, J T (external author)
  •   Madden, John D. W. (external author)
  •   Baughman, Ray H. (external author)
  •   Kim, Seon Jeong. (external author)
  •   Shin, Min-Kyoon (external author)
  •   Mirfakhrai, Tissaphern (external author)
  •   Kozlov, Mikhail E. (external author)
  •   Fang, Shaoli (external author)
  •   Dr Foroughi, Javad
  •   Spinks, Geoff M.
  •   Wallace, Gordon G.

Publication Date


  • 2011

Citation


  • Foroughi, J., Spinks, G. M., Wallace, G. G., Oh, J., Kozlov, M. E., Fang, S., Mirfakhrai, T., Madden, J. D., Shin, M., Kim, S. & Baughman, R. H. (2011). Torsional carbon nanotube artificial muscles. Science, 334 (6055), 494-497.

Scopus Eid


  • 2-s2.0-80055088361

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4090

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 494

End Page


  • 497

Volume


  • 334

Issue


  • 6055

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.

Authors


  •   Oh, J T (external author)
  •   Madden, John D. W. (external author)
  •   Baughman, Ray H. (external author)
  •   Kim, Seon Jeong. (external author)
  •   Shin, Min-Kyoon (external author)
  •   Mirfakhrai, Tissaphern (external author)
  •   Kozlov, Mikhail E. (external author)
  •   Fang, Shaoli (external author)
  •   Dr Foroughi, Javad
  •   Spinks, Geoff M.
  •   Wallace, Gordon G.

Publication Date


  • 2011

Citation


  • Foroughi, J., Spinks, G. M., Wallace, G. G., Oh, J., Kozlov, M. E., Fang, S., Mirfakhrai, T., Madden, J. D., Shin, M., Kim, S. & Baughman, R. H. (2011). Torsional carbon nanotube artificial muscles. Science, 334 (6055), 494-497.

Scopus Eid


  • 2-s2.0-80055088361

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4090

Has Global Citation Frequency


Number Of Pages


  • 3

Start Page


  • 494

End Page


  • 497

Volume


  • 334

Issue


  • 6055