Laser induced selective removal of metallic carbon nanotubes

M. Mahjouri-Samani; Y. S. Zhou; W. Xiong; Y. Gao; M. Mitchell; Y. F. Lu

doi:10.1088/0957-4484/20/49/495202

Laser induced selective removal of metallic carbon nanotubes

M. Mahjouri-Samani, Y. S. Zhou, W. Xiong, Y. Gao, M. Mitchell, Y. F. Lu

Electrical & Computer Engineering

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Distinguishing 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.

Original language	English (US)
Article number	495202
Journal	Nanotechnology
Volume	20
Issue number	49
DOIs	https://doi.org/10.1088/0957-4484/20/49/495202
State	Published - 2009

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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AU - Zhou, Y. S.

AU - Xiong, W.

AU - Gao, Y.

AU - Mitchell, M.

AU - Lu, Y. F.

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AB - Distinguishing 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.

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Laser induced selective removal of metallic carbon nanotubes

Abstract

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