Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interface effects and termination of finite length nanotubes   The objective of the present paper is to investigate interface effects in
carbon nanotubes. We use both real and k-space tight binding method. We study
in detail the effect of wrapping vector on the electronic properties. We
analyze the effect of the curvature in closed nanotube to the electronic
properties. The finite length of the nanotube affects the electronic
properties.

2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th