ABSTRACT: The microwave irradiation effects on purified HiPCO and CoMoCat single-walled carbon nanotube (SWNT) thin films are investigated.
The surface conductivities of the SWNT films are extracted from the measured THz transmission coefficients to provide a direct
indication of the metallic content in the films. The observed drastic conductivity decrease indicates a significant metallic
content reduction after the microwave irradiation. Two different laser excitations are applied for Raman spectroscopy to reveal
the response of different nanotube species. The Raman spectra of both HiPCO and CoMoCat thin films confirm the decrease of
metallic carbon nanotubes. The observed microwave-induced effects may potentially lead to a convenient scheme for demetalization
of single-walled carbon nanotube mixtures.
Applied Physics A 04/2012; 102(2):401-406. · 1.63 Impact Factor