Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Formation of Copper oxide II in polymer solution-blow-spun fibers and
  the successful non-woven ceramic production   Copper oxide II is a p-type semiconductor that can be used in several
applications. Focusing on producing such material using an easy and low-cost
technique, we followed an acetate one-pot-like route for producing a polymer
precursor solution with different acetates:PVP (polyvinylpyrrolidone) weight
ratios. Then, composite nanofibers were produced using the solution blow
spinning (SBS) technique. The ceramic CuO samples were obtained after a
calcination process at 600 oC for two hours, applying a heating rate of 0.5
oC/min. Non-woven fabric-like ceramic samples with average diameters lower than
300 nm were successfully obtained. SEM images show relatively smooth fibers
with a granular morphology. XRD shows the formation of randomly oriented grains
of CuO. In addition, FTIR and XRD analyses show the CuO formation before the
heat treatment. Thus, a chemical reaction sequence was proposed to explain the
results.

9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th