Callaghan Innovation Research Papers

Back to Research Papers

TitleManipulation and purification of multi-walled carbon nanotubes
Publication TypeConference Paper
Year of Publication2004
AuthorsLiu, X., Spencer J.L., Kaiser A.B., and Arnold W.M.
Conference NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Date Published2004
KeywordsCarbon nanotubes, Characterization, Electric conductivity, Electric fields, Electrophoresis, Fractionation, Highly-conductive tubes, Multiwalled carbon nanotubes (MWCNT), Non-tubular structures, Optimization, Polarizable liquid, purification, Raman spectroscopy
AbstractCarbon nanotubes (CNTs) consist of one or more rolled-up sheets of graphitic structure. Some preparative methods produce single-walled cylinders, others give tubes with several nested cylinders arranged concentrically (multiwalled carbon nanotubes, or MWCNTs). Electrically, they can behave as semi-conductors or metals, as also predicted theoretically. The wide range of conductivity should permit a purification and fractionation of the tubes by means of the force exerted on them in an electric field. We describe micro-scale concentration and orientation of MWCNTs, and also their charcterisation using Raman spectroscopy. This is used to monitor their purification using medium-scale apparatus incorporating a flow cell. © 2004 IEEE.

Back to top