title: Dielectrophoretic manipulation of fluorescing single-walled carbon nanotubes.
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.
authors.affiliation: Advanced Technology Institute, Nano-Electronics Centre, University of Surrey, Guildford, UK. n.mureau@surrey.ac.uk
authors.forename: Natacha
authors.initials: N
authors.lastname: Mureau
authors.forename: Ernest
authors.initials: E
authors.lastname: Mendoza
authors.forename: S Ravi P
authors.initials: SR
authors.lastname: Silva
mesh_terms: D002232:Carbocyanines / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D005453:Fluorescence; D008422:Materials Testing; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D017830:Octoxynol / Q000737:chemistry; D010316:Particle Size; D013059:Spectrum Analysis, Raman
chemical_list: D002232:Carbocyanines; D037742:Nanotubes, Carbon; C007392:3,3'-dihexyl-2,2'-oxacarbocyanine; D017830:Octoxynol