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Large Variety of Behaviors for the Raman G´ Mode of Single Walled Carbon Nanotubes upon Electrochemical Gating Arising from Different (n,m) of Individual Nanotubes
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SYSNO ASEP 0322858 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Large Variety of Behaviors for the Raman G´ Mode of Single Walled Carbon Nanotubes upon Electrochemical Gating Arising from Different (n,m) of Individual Nanotubes Title Rozsáhlé variance v chování Ramanského G´modu u jednotlivých jednostěnných uhlíkových nanotub v důsledku elektrochemického dopování vycházející z různých (n,m) jednotlivých nanotub Author(s) Kalbáč, Martin (UFCH-W) RID, ORCID
Kavan, Ladislav (UFCH-W) RID, ORCID
Farhat, H. (US)
Kong, J. (US)
Dresselhaus, M. S. (US)Source Title Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 113, č. 5 (2009), s. 1751-1757Number of pages 7 s. Language eng - English Country US - United States Keywords spectroscopy ; scattering ; spectroelectrochemistry Subject RIV CG - Electrochemistry R&D Projects GC203/07/J067 GA ČR - Czech Science Foundation (CSF) IAA400400804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KAN200100801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) LC510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40400503 - UFCH-W (2005-2011) DOI 10.1021/jp808797c Annotation The dependence of the second-order Raman G' mode of individual single walled carbon nanotubes (SWCNTs) as a function of electrochemical gating has been studied using in situ Raman spectroelectrochemistry. We show that the change of the frequency of the G' mode with electrode potential (delta(omega(G)')/delta(V)) is specific for different (n,m) of individual SWCNTs. The study of the G' mode at the single nanotube level allowed us to observe many effects that get averaged in observations for the SWCNT bundles. These effects included an unusual dependence of the G' mode frequency on electrode potential (V) for particular individual tubes, namely a decrease of the G' mode frequency with increasing magnitude of electrode potential. This occurs for both increasing and decreasing V relative to V = 0. It is demonstrated that there is no simple dependence of delta(omega(G))/delta(V) on tube diameter or excitation laser energy. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2009
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