Carbon-nanotube-based nanoelectromechanical switch

Jeong Won Kang; Ki Ryang Byun; Ki Oh Song; Ho Jung Hwang

doi:10.1117/12.638440

3 January 2006 Carbon-nanotube-based nanoelectromechanical switch

Jeong Won Kang, Ki Ryang Byun, Ki Oh Song, Ho Jung Hwang

Proceedings Volume 6037, Device and Process Technologies for Microelectronics, MEMS, and Photonics IV; 603719 (2006) https://doi.org/10.1117/12.638440
Event: Microelectronics, MEMS, and Nanotechnology, 2005, Brisbane, Australia

Abstract

A nanoelectromechanical model based on atomistic simulations including charge transfer was investigated. Classical molecular dynamics method combined with continuum electric models could be applied to a carbon-nanotube nanoelectromechanical memory device that could be characterized by carbon-nanotube bending performance by atomistic capacitive and interatomic forces. The capacitance of the carbon atom was changed with the height of the carbon atom. We performed MD simulations for a suspended (5,5) carbon-nanotube-bridge with the length of 11.567 nm (L_CNT) and the depth of the trench of 0.9 ~ 1.5 nm (H). After the carbon-nanotube collided on the gold surface, the carbon-nanotube-bridge oscillated on the gold surface with amplitude of ~1 Å, and the amplitude gradually decreased. When H ≤ 1.3 nm, the carbon-nanotube-bridge continually contacted with the gold surface after the first collision. When H ≥ 1.4 nm, the carbon-nanotube-bridge stably contacted with the gold surface after several rebounds. As H increased, the threshold voltage linearly increased. As the applied bias increased, the transition time exponentially decreased at each trench depth. When H / L_CNT was below 0.13, the carbon-nanotube nanoelectromechanical memories were permanent nonvolatile memory devices, whereas the carbon-nanotube nanoelectromechanical memories were volatile memory or switching devices when H / L_CNT was above 0.14. The turn-on voltages and tunneling resistances obtained from our simulations are compatible to those obtained from previous experimental and theoretical results.

Citation Download Citation

Jeong Won Kang, Ki Ryang Byun, Ki Oh Song, and Ho Jung Hwang "Carbon-nanotube-based nanoelectromechanical switch", Proc. SPIE 6037, Device and Process Technologies for Microelectronics, MEMS, and Photonics IV, 603719 (3 January 2006); https://doi.org/10.1117/12.638440

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KEYWORDS

Chemical species

Gold

Carbon

Capacitance

Picosecond phenomena

Nanoelectromechanical systems

Switches

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