M Mahjouri-Samani et al 2009 Nanotechnology 20 495202 doi:10.1088/0957-4484/20/49/495202
M Mahjouri-Samani, Y S Zhou, W Xiong, Y Gao, M Mitchell and Y F Lu1
Show affiliationsDistinguishing between carbon nanotubes (CNTs) according to their individual electronic properties is of significant importance for developing CNT-based electronics and devices. In this study, selective removal of metallic CNTs from CNT mixtures on silicon substrates was investigated using controlled laser irradiation. Free electron movement and eddy currents are induced within the metallic CNTs by the strong electric field and optical near-field effects caused by the laser irradiation. Selective heating of metallic CNTs in air results in selective removal of metallic CNTs when the laser fluence and wavelength are properly selected. Through this process, metallic nanotubes are successfully removed from the CNT mixtures. This technique provides an efficient single-step approach for selective removal of metallic CNTs from CNT mixtures.
61.48.-c Structure of fullerenes and related hollow molecular clusters
61.82.Rx Nanocrystalline materials
81.16.-c Methods of nanofabrication and processing
61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)
Issue 49 (9 December 2009)
Received 18 July 2009, in final form 13 October 2009
Published 6 November 2009
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