Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synthesis of Carbon Nanotubes   Carbon nanotubes play a fundamental role in the rapidly developing field of
nanoscience and nanotechnology because of their unique properties and high
potential applictions. In this article, the different synthesis method of CNTs
are reviewed. From the industrial point of view, the chemical vapor depostion
method has shown advantages over electric arc discharge and laser vaporization
methods. Special CNTs configuration, such as nanocoils, nanohorns,
bamboo-shaped CNTs and carbon cylinder made up from from CNTs are also
discussed.

29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga