Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical spectra and structure of CdP4 nanoclusters fabricated by
  incorporation into zeolite and laser ablation   CdP4 nanoclusters were fabricated by incorporation into the pores of zeolite
Na-X and by deposition of the clusters onto a quartz substrate using laser
ablation-evaporation technique. Absorption and photoluminescence (PL) spectra
of CdP4 nanoclusters in zeolite were measured at the temperatures of 4.2, 77
and 293 K. Both absorption and PL spectra consist of two blue shifted bands. We
performed DFT calculations to determine the most stable clusters configuration
in the size region up to size of the zeolite Na-X supercage. The bands observed
in absorption and PL spectra were attributed to emission of (CdP4)3 and (CdP4)4
clusters with binding energies of 3.78 eV and 4.37 eV per atom respectively.
The Raman spectrum of CdP4 clusters in zeolite proved the fact of creation of
(CdP4)3 and (CdP4)4 clusters in zeolite pores. The PL spectrum of CdP4 clusters
produced by laser ablation consists of single band that was attributed to
emission of (CdP4)4 cluster.

23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
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
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc