Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Raman and optical characterization of multilayer turbostratic graphene
  grown via chemical vapor deposition   We synthesize large-area graphene via atmospheric-pressure (AP) chemical
vapor deposition (CVD) on copper, and transfer to SiO2 wafers. In contrast to
low-pressure (LP) CVD on copper, optical contrast and atomic force microscopy
measurements show AP-CVD graphene contains significant multi-layer areas. Raman
spectroscopy always shows a single Lorentzian 2D peak, however systematic
differences are observed in the 2D peak energy, width, and intensity for
single- and multi-layer regions. We conclude that graphene multi-layers grown
by AP-CVD on Cu are rotationally disordered.

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The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci