W Xiong et al 2009 Nanotechnology 20 025601 doi:10.1088/0957-4484/20/2/025601
W Xiong1, Y S Zhou1, M Mahjouri-Samani1, W Q Yang1, K J Yi1, X N He1, S H Liou2 and Y F Lu1,3
Show affiliationsSelf-aligned growth of ultra-short single-walled carbon nanotubes (SWNTs) was realized by utilizing optical near-field effects in a laser-assisted chemical vapor deposition (LCVD) process. By introducing the optical near-field effects, bridge structures containing single suspended SWNT channels were successfully fabricated through the LCVD process at a relatively low substrate temperature. Raman spectroscopy and I–V analyses have been carried out to characterize the SWNT-bridge structures. Numerical simulations using a high-frequency structure simulator revealed that significant enhancement of local heating occurs at metallic electrode tips under laser irradiation; it is about one order of magnitude higher than that in the rest of the electrodes. This technique suggests a novel approach to in situ low-temperature fabrication of SWNT-based devices in a precisely controlled manner, based on the nanoscale heating enhancement induced by the optical near-field effects.
81.16.Mk Laser-assisted deposition
78.30.Hv Other nonmetallic inorganics
61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)
Condensed matter: electrical, magnetic and optical
Issue 2 (14 January 2009)
Received 30 September 2008, in final form 19 November 2008
Published 9 December 2008
W Xiong et al 2009 Nanotechnology 20 025601
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