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- W2007395342 abstract "Electrochemical doping of bisulfate ions into single wall carbon nanotube (SWNT) bundles has been studied using coulometry, cyclic voltammetry, mass-uptake measurements, and Raman scattering experiments. A spontaneous charge-transfer reaction is observed prior to the application of an electrochemical driving force, in sharp contrast to previous observations in the graphite−H2SO4 system. A mass increase of the SWNT sample and a concomitant upshift of the Raman-active tangential mode frequency indicate oxidation (i.e., removal of electrons) of the SWNT bundles. In fact, using Raman scattering, we were able to separate the spontaneous and electrochemical contributions to the overall charge transfer, resulting in the value of an upshift of 320 cm-1 per hole, per C-atom introduced into the carbon π-band by the bisulfate (HSO4-) dopant. This value may prove to be a universal measure of charge transfer in acceptor-type SWNT compounds. At a critical electrochemical doping, the SWNT bundles are driven into an “overoxidation” regime, where they are irreversibly oxidized with the formation of C−O covalent bonds, analogous to electrochemical formation of graphite oxides." @default.
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- W2007395342 date "1999-04-30" @default.
- W2007395342 modified "2023-10-16" @default.
- W2007395342 title "Electrochemical Oxidation of Single Wall Carbon Nanotube Bundles in Sulfuric Acid" @default.
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- W2007395342 doi "https://doi.org/10.1021/jp984362t" @default.
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