Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synthesis and/or grafting of noble metal nanoparticles by microplasma
  and by atmospheric plasma torch   Plasmas at atmospheric pressure are presented as a simple, fast, and
versatile tool for the synthesis or/and the grafting of noble metallic NPs (Au,
Pt) on substrates. In this study, noble metal NPs are generated either by the
reduction of a gold salt in an aqueous medium by microplasma or either by the
decomposition of a platinum or gold organometallic in the post-discharge of an
atmospheric plasma torch. The latter can also be used for the grafting of NPs
from a commercial colloidal solution

33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat