Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/62934
Type: Artigo de periódico
Title: Charge transfer effects in acid treated single-wall carbon nanotubes
Author: Barros, EB
Souza, AG
Lemos, V
Mendes, J
Fagan, SB
Herbst, MH
Rosolen, JM
Luengo, CA
Huber, JG
Abstract: Single-wall carbon nanotubes (SWNTs) prepared by the arc discharge method were oxidized using nitric acid. The samples were analyzed by using Raman scattering and Fourier transformed infrared spectroscopy (FTIR). The FTIR results indicate the presence of -COOH acid groups in the treated samples. The up shifts observed in the radial breathing mode frequencies suggest that SWNTs behave as donors after the acid treatment, with charge transfer occurring from the nanotubes to the -COOH groups. Ab initio calculations of SWNTs interacting with -COOH acid groups support the charge transfer process from the nanotubes to the carboxyl groups. (C) 2005 Elsevier Ltd. All rights reserved.
Subject: carbon nanotubes
arc discharge
Raman spectroscopy
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/j.carbon.2005.04.032
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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