Carbon nanotube alignment driven rapid actuations

Suspended micro-beams made from aligned carbon nanotubes and parylene deflect reversibly in an ac field and the deflection rate is three orders of magnitude greater than those for existing devices. The direction of beam deflection is determined by the area moment of inertia and the actuation mechani...

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Bibliographic Details
Published in:Nanotechnology 2013-11, Vol.24 (46), p.465501-465501
Main Authors: Lin, Yu-Hsien, Tsai, Hsin-Jung, Chang, Han-Chen, Lin, Wen-Yi, Fang, Wei-Leun, Hsu, Wen-Kuang
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Physics
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Summary:Suspended micro-beams made from aligned carbon nanotubes and parylene deflect reversibly in an ac field and the deflection rate is three orders of magnitude greater than those for existing devices. The direction of beam deflection is determined by the area moment of inertia and the actuation mechanism involves rapid accumulation of charges at tube surfaces, the creation of Coulomb repulsive forces between tubes, beam dilation and the formation of compressive stresses at beam ends. Tube alignment plays a crucial role in the first step as is verified by experimental data and calculation.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/24/46/465501