room-temperature semiconductor gas sensor based on nonstoichiometric tungsten oxide nanorod film
room-temperature semiconductor gas sensor based on nonstoichiometric tungsten oxide nanorod film
... Room-temperature semiconductor gas sensor based on nonstoichiometric
tungsten oxide nanorod film
Yong Shin Kim,
a͒
Seung-Chul Ha, Kyuwon Kim,
b͒
Haesik Yang,
c͒
Sung-Yool ... opportunity for tungsten oxide-
based gas sensor development. In this letter, we report fab-
rication of a MOS gas sensor, which entails drop coating of
WO
2.72
nanorod solution on the...
room-temperature semiconductor gas sensor based on nonstoichiometric
... Room-temperature semiconductor gas sensor based on nonstoichiometric
tungsten oxide nanorod film
Yong Shin Kim,
a͒
Seung-Chul Ha, Kyuwon Kim,
b͒
Haesik Yang,
c͒
Sung-Yool ... opportunity for tungsten oxide-
based gas sensor development. In this letter, we report fab-
rication of a MOS gas sensor, which entails drop coating of
WO
2.72
nanorod solution on the...
semiconductor gas sensors based on nanostructured tungsten oxide
... Ž.
Thin Solid Films 391 2001 255᎐260
Semiconductor gas sensors based on nanostructured tungsten
oxide
J.L. Solis
a,1
, S. Saukko
b
, L. Kish
a,2
, C.G. ... oxygen ions adsorbed at low temperatures on
oxide semiconductor surfaces are thought to be O
y
,
2
wx
even at room temperature 26 . Consequently, the elec-
tron transfer to surface species in connection ... Elsevier Scien...
a selective nh3 gas sensor based on fe2o3–zno nanocomposites at room temperature
... 1e) belonged to ZnO nanorods.
3.3. Selectivity of gas sensors based on Fe
2
O
3
–ZnO
nanocomposites
Fig. 4 shows the selectivity of the gas sensor based on pure
ZnO nanoparticle. The sensor was ... of the gas sensor based on 2% Fe
2
O
3
–ZnO nanoparticle.
3.5. Reproducibility of gas sensor based on 2%
Fe
2
O
3
–ZnO nanoparticles
Fig. 7 shows the reproducibility...
ammonia gas sensor based on electrosynthesized polypyrrole films
... evolution of the electrical signal when
Fig. 6. Sensor s electrical responses to various ammonia concentrations (a). Slope of the gas sensor s electrical response vs. NH
3
concentrations (b).
204 ... we can plot the variation of
the slope versus ammonia concentrations. Fig. 6b represents the
evolution of the slope versus the ammonia concentration. Above
concentrations of 500 ppm, we notic...
sensitivity properties of a novel no2 gas sensor based on mesoporous wo3 thin film
... WO
3
;NO
2
gas sensor; Sol–gel process
1. Introduction
The detection of NO
2
is important for monitoring environ-
mental pollution resulting from combustion or automotive
emissions [1]. Existing gas sensor ... gas sensors [6].
WO
3
is an n-type semiconductor whose electron concen-
tration is determined mainly by the concentration of stoi-
chiometric defects such as oxygen vacancy l...
room temperature liquefied petroleum gas (lpg) sensor based on p - polyaniline n - tio2 heterojunction
... LPG.
is concluded that the gas response is a function of LPG concentra-
tion. The gas response increased from 15 to 63% with an increase
in concentration of LPG from 0.04 to 0.1 vol%. The maximum gas
response ... p-polyaniline/n-TiO
2
heterojunction at a
fixed voltage of +2 V and at a concentration of 0.1 vol% LPG.
Fig. 7. Variation of response and recovery time of the heterojunction se...
xps studies of active elements surface of gas sensors based on wo3nanoparticles
... work conditions important is the exploration
of the state of sensor s surface after long contact with air at room
temperature and influence of short-time anneal.
We synthesized nanodisperse nonstoichiometric ... nonstoichiometric tungsten
oxides, which demonstrated high sensor response to molecu-
lar hydrogen and rare gases at room temperature. Earlier the
effect of sensitivity to rar...
gas sensing properties of nanocrystalline tungsten oxide synthesized by acid
... resistance on exposure to a gas. Due to the
constraints of gas permeation only the surface layers are affected
by such reactions. Among various oxide sensors, WO
3
is responsive
to NO
x
,H
2
S, and ... preparation. This technique was well
reported for NO
2
sensor fabrication [15]. However, it is not widely
explored for ammonia gas sensors preparation.
In the present work, we invest...
Electrochemical biosensors based on functionalized zinc oxide nanorods
... low to high nanorods concentrations beyond a couple of production periods. The
L929 cell line showed good reproduction behavior at lower nanorods concentration. In
general, ZnO nanorods showed ... fabrication and demonstration of ZnO nanorods based sensor suitable
for extra and intracellular selective Ca
2+
detection. Our main effort has been directed
towards the construction of tips...