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Effects of aggregation and electron–phonon interactions on RBM spectral reconstruction of single walled carbon nanotubes
Author(s) -
Luo Zhengtang,
Doorn Stephen K.,
Li Rongfu,
Papadimitrakopoulos Fotios
Publication year - 2006
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200669215
Subject(s) - carbon nanotube , raman spectroscopy , phonon , image warping , materials science , molecular physics , electron , spectral line , matrix (chemical analysis) , condensed matter physics , chemistry , nanotechnology , physics , optics , quantum mechanics , composite material , computer science , artificial intelligence
We present a methodology to reconstruct the radial breathing mode (RBM) region of the resonance Raman spectra of single walled carbon nanotubes (SWNTs) in isolated and aggregated states. This methodology takes into account the experimentally determined electron–phonon matrix elements ( M ph ) along with an energetic deviation term (Δ E ). In the case of isolated SWNTs, Δ E was found to be zero, while the RBM spectral reconstruction was insensitive to variations of the electron–phonon matrix elements. On the other hand, incorpration of a non‐zero Δ E value and M ph values corrected for diameter and chiral angle dependence through trigonal warping effects was necessary in order to obtain optimum RBM spectral reconstruction for aggregated SWNT samples. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)