Phys. Rev. B 73, 235413 (2006) [12 pages]Resonance Raman scattering studies in Br2-adsorbed double-wall carbon nanotubesReceived 11 January 2006; revised 19 April 2006; published 16 June 2006 The vibrational and electronic properties of Br2-adsorbed double-wall carbon nanotubes (DWNTs) were investigated by resonance Raman scattering. Special attention was given to distinguish the behavior between S/M and M/S outer/inner semiconducting (S) and metallic (M) tubes. By using three laser excitation energies 2.33, 1.96, and 1.58 eV, resonance Raman spectra were obtained for the DWNTs before and after bromine adsorption, and also for the Br-Br molecular resonance, thereby facilitating the study of charge transfer between the DWNTs and the bromine. It was found that Br2 molecules act as acceptors and that metallic nanotubes are specially sensitive to the presence of Br2 molecules even when they constitute the inner tubes of DWNTs. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.73.235413
DOI:
10.1103/PhysRevB.73.235413
PACS:
73.22.−f, 78.30.Na
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