Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Room-temperature synthesis of graphene-like carbon sheets from C2H2, CO2
  and CO on copper foils   A high temperature for some catalytic reactions like synthesis of large area
and high quality graphene is required. The mentioned graphene can be obtained
by a chemical vapour deposition (CVD) process on copper foil at 800 1000. Here,
we describe a room temperature synthesis method from different carbon sources
for the first time, including acetylene, carbon dioxide and carbon monoxide, on
copper foil by using a heuristic method which was inspired from the role of
some electronic promoters in catalyst science. Promoters are substances that
increase the catalytic activity, but they are not catalysts by themselves. In
this study, we used charges to modify the electronic effects of the catalysts,
which were produced by piezoelectric materials.

32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math