Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: N-Graphene Synthesized in Astrochemical Ices   Icy mantles of benzonitrile, an aromatic with a cyanide side chain that has
recently been detected in the interstellar medium, were subjected to vacuum
ultraviolet photon irradiation and found to form a residue. The residue was
removed from the substrate and placed on a Quantifoil grid for electron
microscopy analysis. Transmission electron microscopy showed Quantum Dot (QD)
and Nitrogen-doped Graphene (N-Graphene) sheets. Diffraction and Energy
Dispersive X-ray Spectroscopy revealed the crystalline nature and
carbon-nitrogen composition, of the observed graphene sheet. This is the first
result showing QD and N-Graphene synthesis in ice irradiation at interstellar
temperatures.

9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex