Details

Autor(en) / Beteiligte

• Liu, Z. F.
• Fang, S.
• Moura, F. A.
• Ding, J. N.
• Jiang, N.
• Di, J.
• Zhang, M.
• Lepró, X.
• Galvão, D. S.
• Haines, C. S.
• Yuan, N. Y.
• Yin, S. G.
• Lee, D. W.
• Wang, R.
• Wang, H. Y.
• Lv, W.
• Dong, C.
• Zhang, R. C.
• Chen, M. J.
• Yin, Q.
• Chong, Y. T.
• Zhang, R.
• Wang, X.
• Lima, M. D.
• Ovalle-Robles, R.
• Qian, D.
• Lu, H.
• Baughman, R. H.

Titel

Hierarchically buckled sheath-core fibers for superelastic electronics, sensors, and muscles

Ist Teil von

• Science (American Association for the Advancement of Science), 2015-07, Vol.349 (6246), p.400-404

Ort / Verlag

Washington: American Association for the Advancement of Science

Erscheinungsjahr

2015

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• Superelastic conducting fibers with improved properties and functionalities are needed for diverse applications. Here we report the fabrication of highly stretchable (up to 1320%) sheath-core conducting fibers created by wrapping carbon nanotube sheets oriented in the fiber direction on stretched rubber fiber cores. The resulting structure exhibited distinct short- and long-period sheath buckling that occurred reversibly out of phase in the axial and belt directions, enabling a resistance change of less than 5% for a 1000% stretch. By including other rubber and carbon nanotube sheath layers, we demonstrated strain sensors generating an 860% capacitance change and electrically powered torsional muscles operating reversibly by a coupled tension-to-torsion actuation mechanism. Using theory, we quantitatively explain the complementary effects of an increase in muscle length and a large positive Poisson's ratio on torsional actuation and electronic properties.