Journal
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume 40, Issue 7, Pages 2347-2351Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physe.2007.10.088
Keywords
optical trapping; nanotubes; dispersion; scattering theory
Funding
- EPSRC [EP/E500935/1] Funding Source: UKRI
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Optical trapping is a new tool for the manipulation and deposition of single wall carbon nanotube (SWNT) bundles. We present a study on optical trapping and manipulation of SWNT bundles in different environments, aimed at understanding the trapping mechanism. SWNTs are dispersed in water or organic solvents, and a wide range of both ionic and non-ionic surfactants, with different chain lengths, is used. We demonstrate that the surfactant plays a key role in optical trapping, strongly affecting the trapping force. Finally we discuss the calculation of radiation force for quasi-one-dimensional (1D) nanoparticles by means of field expansion in the framework of the T-matrix approach. (c) 2007 Elsevier B.V. All rights reserved.
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