| Autor: |
Liu S; Department of Electrical Engineering, Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802 (USA)., Liu Y, Cebeci H, de Villoria RG, Lin JH, Wardle BL, Zhang QM |
| Jazyk: |
angličtina |
| Zdroj: |
Advanced functional materials [Adv Funct Mater] 2010 Oct 08; Vol. 20 (19), pp. 3266-3271. |
| DOI: |
10.1002/adfm.201000570 |
| Abstrakt: |
Recent advances in fabricating controlled-morphology vertically aligned carbon nanotubes (VA-CNTs) with ultrahigh volume fraction create unique opportunities for markedly improving the electromechanical performance of ionic polymer conductor network composite (IPCNC) actuators. Continuous paths through inter-VA-CNT channels allow fast ion transport, and high electrical conduction of the aligned CNTs in the composite electrodes lead to fast device actuation speed (>10% strain/second). One critical issue in developing advanced actuator materials is how to suppress the strain that does not contribute to the actuation (unwanted strain) thereby reducing actuation efficiency. Here our experiments demonstrate that the VA-CNTs give an anisotropic elastic response in the composite electrodes, which suppresses the unwanted strain and markedly enhances the actuation strain (>8% strain under 4 volts). The results reported here suggest pathways for optimizing the electrode morphology in IPCNCs using ultra-high volume fraction VA-CNTs to further enhanced performance. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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