Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intrinsic Optical Transition Energies in Carbon Nanotubes   Intrinsic optical transition energies for isolated and individual single wall
carbon nanotubes grown over trenches are measured using tunable resonant Raman
scattering. Previously measured E22_S optical transitions from nanotubes in
surfactants are blue shifted 70-90 meV with respect to our measurements of
nanotubes in air. This large shift in the exciton energy is attributed to a
larger change of the exciton binding energy than the band-gap renormalization
as the surrounding dielectric constant increases.

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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th