Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The optical properties of transferred graphene and the dielectrics grown
  on it obtained by ellipsometry   Graphene layers grown by chemical vapour deposition (CVD) method and
transferred from Cu-foils to the oxidized Si-substrates were investigated by
spectroscopic ellipsometry (SE), Raman and X-Ray Photoelectron Spectroscopy
(XPS) methods. The optical properties of transferred CVD graphene layers do not
always correspond to the ones of the exfoliated graphene due to the
contamination from the chemicals used in the transfer process. However, the
real thickness and the mean properties of the transferred CVD graphene layers
can be found using ellipsometry if a real thickness of the SiO2 layer is taken
into account. The pulsed layer deposition (PLD) and atomic layer deposition
(ALD) methods were used to grow dielectric layers on the transferred graphene
and the obtained structures were characterized using optical methods. The
approach demonstrated in this work could be useful for the characterization of
various materials grown on graphene.

13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas