Abstract
A review is presented of the resonance Raman spectra from individual
isolated single-wall carbon nanotubes (SWNTs). A brief summary is given
of how. the measurements are made. Why the resonance Raman effect allows
single-carbon nanotube spectra to be observed easily and under normal
operating conditions is summarized. The important structural information
that is provided by single-nanotube spectroscopy using one laser line is
discussed, and what else can be learned from tunable laser experiments
is reviewed. Particular attention is given to the determination of the
nanotube diameter and of the energy of its van Hove singularities E-ii.
Applications of single-nanotube spectroscopy are emphasized, such as
measurements of isolated SWNTs connected with circuit-based samples and
of isolated SWNTs mounted on an atomic force microscope tip. A critical
assessment of the opportunities and limitations of the resonance Raman
method for structural (n, m) identification is presented. The trigonal
warping effect, which is central to the (n, m) identification in
resonance Raman spectroscopy, is discussed in simple terms, and the
importance of this effect in nanotube science and applications is
reviewed.
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