Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sensor properties of Pd doped SnO2 nanofiber enshrouded with
  functionalized MWCNT   In this work, tin oxide (SnO2)/multi-walled carbon nanotube (MWCNT) composite
based ethanol sensor that exhibits fast response/recovery behaviour, large
sensitivity, and good selectivity was demonstrated. First, Pd doped SnO2
(SnO2-Pd) nanofibers was prepared on the interdigitated electrodes (IDE) using
electrospinning technique, followed by calcination at 600 0C for 2 h. Then,
carboxylic acid modified multi-walled carbon nanotube (MWCNT-COOH) was dropped
on the nanofibers and allowed to dry at RT. Next, the thin films were
characterized by field emission scanning electron microscopy (FE-SEM),
transmission electron microscopy (TEM), X-ray diffraction (XRD) and
thermogravimetric analysis (TGA). Finally, chemical sensing behaviors of the
sensors were analyzed against to ethanol (ETH), toluene (TOL),
trichloroethylene (TCE), acetone (ACE) and binary mixing with water. It was
demonstrated that increasing the temperature and gas concentration has led to
increased sensor response for SnO2-Pd nanofiber system. However, there was no
general rule found for MWCNT-COOH coated SnO2-Pd nanofiber system. A novel
sensing mechanism was offered for the composite structure.

31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat