An Anomalous Enhancement of the A(g)(2) Mode in the Resonance Raman Spectra of C-60 Embedded in Single-Walled Carbon Nanotubes during Anodic Charging

0345288 - ÚFCH JH 2011 RIV US eng J - Journal Article
Kalbáč, Martin - Zólyomi, V. - Rusznyák, A. - Koltai, J. - Kürti, J. - Kavan, Ladislav
An Anomalous Enhancement of the A(g)(2) Mode in the Resonance Raman Spectra of C-60 Embedded in Single-Walled Carbon Nanotubes during Anodic Charging.
Journal of Physical Chemistry C. Roč. 114, č. 6 (2010), 2505-2511. ISSN 1932-7447. E-ISSN 1932-7455
R&D Projects: GA AV ČR IAA400400804; GA AV ČR IAA400400911; GA AV ČR KAN200100801; GA ČR GC203/07/J067
Institutional research plan: CEZ:AV0Z40400503
Keywords : spectroelectrochemie * Raman spectra * SWNT
Subject RIV: CG - Electrochemistry
Impact factor: 4.520, year: 2010

The effect of electrochemical charging on C-60 fullerenes embedded in single-walled carbon nanotubes (peapods) has been studied. The Raman A(g)(2) mode of C-60 fullerene has been used as a probe. The spectra were measured using seven different laser excitation energies. For cathodic charging we observed bleaching of the A(g)(2) mode independent of laser excitation energy. Oil the other hand for anodic charging the behavior of the A(g)(2) mode was dependent on laser excitation energy. The intensity of the A(g)(2) mode decreased only for the 1.16 eV laser excitation energy. In the case of other laser excitation energies (2.70, 2.60, 2.54, 2.41, 2.33, 2.18 eV) an increase of intensity has been observed. The dependence of the slope of the intensity on the electrode potential has been found to be a function of laser excitation energy.
Permanent Link: http://hdl.handle.net/11104/0186602