Article

Dielectrophoretic manipulation of fluorescing single-walled carbon nanotubes.

Advanced Technology Institute, Nano-Electronics Centre, University of Surrey, Guildford, UK.
Electrophoresis (impact factor: 3.3). 02/2013; 28(10):1495-8. DOI:10.1002/elps.200600607 pp.1495-8
Source: PubMed

ABSTRACT We investigate the behavior of fluorescing single-walled carbon nanotubes (SWCNTs) under dielectrophoretic conditions and demonstrate their collection with fluorescence microscopy. SWCNTs are dispersed in water with the aid of a nonionic surfactant, Triton X-100, and labeled through noncovalent binding with the dye 3,3'-dihexyloxacarbocyanine iodide (diOC(6)). The chromophore's affinity to the SWCNTs is due to pi-stacking interactions. Carbon nanotube (CNT) localization is clearly identified on the fluorescence images, showing that the nanotubes concentrate between the electrodes and align along the electric field lines.

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Keywords

chromophore's affinity
 
CNT
 
dielectrophoretic conditions
 
fluorescence images
 
fluorescence microscopy
 
fluorescing single-walled carbon nanotubes
 
noncovalent binding
 
nonionic surfactant
 
pi-stacking interactions
 
SWCNTs