title: Resonance Raman spectroscopy characterization of single-wall carbon nanotube separation by their metallicity and diameter.
abstract: Several techniques were recently reported for the bulk separation of metallic (M) and semiconducting (S) single wall carbon nanotubes (SWNTs), using optical absorption and resonance Raman spectroscopy (RRS) as a proof of the separation. In the present work, we develop a method for the quantitative evaluation of the M to S separation ratio, and also for the SWNT diameter selectivity of the separation process, based on RRS. The relative changes in the integrated intensities of the radial-breathing mode (RBM) features, with respect to the starting material, yield the diameter probability distribution functions for M and S SWNTs in the separated fractions, accounting for the different resonance conditions of individual SWNTs, while the diameter distribution of the starting material is obtained following the fitting procedure developed by Kuzmany and coworkers. Features other than the RBM are generally less effective for characterization of the separation process for SWNTs.
authors.affiliation: Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA
authors.forename: V W
authors.initials: VW
authors.lastname: Brar
authors.forename: Ge G
authors.initials: GG
authors.lastname: Samsonidze
authors.forename: A P
authors.initials: AP
authors.lastname: Santos
authors.forename: S G
authors.initials: SG
authors.lastname: Chou
authors.forename: D
authors.initials: D
authors.lastname: Chattopadhyay
authors.forename: S N
authors.initials: SN
authors.lastname: Kim
authors.forename: F
authors.initials: F
authors.lastname: Papadimitrakopoulos
authors.forename: M
authors.initials: M
authors.lastname: Zheng
authors.forename: A
authors.initials: A
authors.lastname: Jagota
authors.forename: G B
authors.initials: GB
authors.lastname: Onoa
authors.forename: A K
authors.initials: AK
authors.lastname: Swan
authors.forename: M S
authors.initials: MS
authors.lastname: Unlü
authors.forename: B B
authors.initials: BB
authors.lastname: Goldberg
authors.forename: G
authors.initials: G
authors.lastname: Dresselhaus
authors.forename: M S
authors.initials: MS
authors.lastname: Dresselhaus
mesh_terms: D008670:Metals / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D008670:Metals; D037742:Nanotubes, Carbon