Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectroscopic study of double-walled carbon nanotubes functionalization
  for preparation of carbon nanotube / epoxy composites   A spectroscopic study of the amino functionalization of double-walled carbon
nanotube (DWCNT) is performed. Original experimental investigations by near
edge X-ray absorption fine structure spectroscopy at the C and O K-edges allow
one to follow the efficiency of the chemistry during the different steps of
covalent functionalization. Combined with Raman spectroscopy, the
characterization gives a direct evidence of the grafting of amino-terminated
molecules on the structural defects of the DWCNT external wall, whereas the
internal wall does not undergo any change. Structural and mechanical
investigation of the amino functionalized DWCNT / epoxy composites show
coupling between epoxy molecules and the DWCNTs. Functionalization improves the
interface between amino-functionalized DWCNT and the epoxy molecules. The
electrical transport measurements indicate a percolating network formed only by
inner metallic tubes of the DWCNTs. The activation energy of the barriers
between connected metallic tubes is determined around 20 meV.

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The categories of this paper are: nlin
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The categories of this paper are: q-bio
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The categories of this paper are: math
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph