Utilization and Measurements of Ferric Oxide thin films as a Nitride Dioxide gas sensor

In this work, we investigate and revealed a (NO2) gas sensing properties of Ferric oxide (Fe2O3) thin films prepared using magnetron DC- sputtering technique, using different thicknesses concurring various deposition times. Each film tested with different sample temperature (200, 250 and 300) oC in order to enhance gas sensitivity. The results reveal that the sensitivity increase as the film thickness decrease (lower grain size) the film gas sensitivity increases, and the gas sensitivity increase also with increasing the operating temperature.

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Chemically synthesized PbS Nano particulate thin films for a rapid NO2 gas sensor

Materials Science-Poland ◽

10.1515/msp-2016-0001 ◽

2016 ◽

Vol 34 (1) ◽

pp. 204-211 ◽

Cited By ~ 20

Author(s):

Vishal V. Burungale ◽

Rupesh S. Devan ◽

Sachin A. Pawar ◽

Namdev S. Harale ◽

Vithoba L. Patil ◽

...

Keyword(s):

Thin Films ◽

Gas Sensor ◽

Gas Sensing ◽

Operating Temperature ◽

Morphological Properties ◽

X Ray Diffraction ◽

Gas Sensitivity ◽

Silar Method ◽

Layer Adsorption ◽

Gas Sensing Properties

AbstractRapid NO2 gas sensor has been developed based on PbS nanoparticulate thin films synthesized by Successive Ionic Layer Adsorption and Reaction (SILAR) method at different precursor concentrations. The structural and morphological properties were investigated by means of X-ray diffraction and field emission scanning electron microscope. NO2 gas sensing properties of PbS thin films deposited at different concentrations were tested. PbS film with 0.25 M precursor concentration showed the highest sensitivity. In order to optimize the operating temperature, the sensitivity of the sensor to 50 ppm NO2 gas was measured at different operating temperatures, from 50 to 200 °C. The gas sensitivity increased with an increase in operating temperature and achieved the maximum value at 150 °C, followed by a decrease in sensitivity with further increase of the operating temperature. The sensitivity was about 35 % for 50 ppm NO2 at 150 °C with rapid response time of 6 s. T90 and T10 recovery time was 97 s at this gas concentration.

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Gas-sensing features of nanostructured tellurium thin films

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.11.85 ◽

2020 ◽

Vol 11 ◽

pp. 1010-1018

Author(s):

Dumitru Tsiulyanu

Keyword(s):

Thin Films ◽

Gas Sensing ◽

Operating Temperature ◽

Active Surface ◽

Active Surface Area ◽

Gas Sensitivity ◽

Nanocrystalline And Amorphous ◽

Recovery Times ◽

Order Of Magnitude ◽

Response And Recovery

Nanocrystalline and amorphous nanostructured tellurium (Te) thin films were grown and their gas-sensing properties were investigated at different operating temperatures with respect to scanning electron microscopy and X-ray diffraction analyses. It was shown that both types of films interacted with nitrogen dioxide, which resulted in a decrease of electrical conductivity. The gas sensitivity, as well as the response and recovery times, differed between these two nanostructured films. It is worth mentioning that these properties also depend on the operating temperature and the applied gas concentration on the films. An increase in the operating temperature decreased not only the response and recovery times but also the gas sensitivity of the nanocrystalline films. This shortcoming could be solved by using the amorphous nanostructured Te films which, even at 22 °C, exhibited higher gas sensitivity and shorter response and recovery times by more than one order of magnitude in comparison to the nanocrystalline Te films. These results were interpreted in terms of an increase in disorder (amorphization), leading to an increase in the surface chemical activity of chalcogenides, as well as an increase in the active surface area due to substrate porosity.

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Hydrogen sulfide gas sensing properties of thin films derived from SnO2 sols different in grain size

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2004.06.034 ◽

2005 ◽

Vol 105 (2) ◽

pp. 437-442 ◽

Cited By ~ 67

Author(s):

Dang Duc Vuong ◽

Go Sakai ◽

Kengo Shimanoe ◽

Noboru Yamazoe

Keyword(s):

Thin Films ◽

Grain Size ◽

Hydrogen Sulfide ◽

Gas Sensing ◽

Sensing Properties ◽

Gas Sensing Properties

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Structural, morphological and gas sensing properties of Zn1−xSnxO thin films by SILAR method

Applied Physics A ◽

10.1007/s00339-021-04354-7 ◽

2021 ◽

Vol 127 (4) ◽

Author(s):

Irmak Karaduman Er ◽

Memet Ali Yıldırım ◽

H. Hasan Örkçü ◽

Aytunç Ateş ◽

Selim Acar

Keyword(s):

Thin Films ◽

Gas Sensing ◽

Silar Method ◽

Sensing Properties ◽

Gas Sensing Properties

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Polyaniline/SnO2 Nanocomposite Sensor for NO2 Gas Sensing at Low Operating Temperature

International Journal of Nanoscience ◽

10.1142/s0219581x15500118 ◽

2015 ◽

Vol 14 (04) ◽

pp. 1550011 ◽

Cited By ~ 8

Author(s):

A. Sharma ◽

M. Tomar ◽

V. Gupta ◽

A. Badola ◽

N. Goswami

Keyword(s):

Thin Films ◽

Gas Sensing ◽

High Sensitivity ◽

Morphological Properties ◽

X Ray Diffraction ◽

Chemical Route ◽

Sensing Properties ◽

Response Recovery ◽

Transmission Electron ◽

Gas Sensing Properties

In this paper gas sensing properties of 0.5–3% polyaniline (PAni) doped SnO 2 thin films sensors prepared by chemical route have been studied towards the trace level detection of NO 2 gas. The structural, optical and surface morphological properties of the PAni doped SnO 2 thin films were investigated by performing X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Raman spectroscopy measurements. A good correlation has been identified between the microstructural and gas sensing properties of these prepared sensors. Out of these films, 1% PAni doped SnO 2 sensor showed high sensitivity towards NO 2 gas along with a sensitivity of 3.01 × 102 at 40°C for 10 ppm of gas. On exposure to NO 2 gas, resistance of all sensors increased to a large extent, even greater than three orders of magnitude. These changes in resistance upon removal of NO 2 gas are found to be reversible in nature and the prepared composite film sensors showed good sensitivity with relatively faster response/recovery speeds.

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A comparative study on the NO2 gas sensing properties of ZnO thin films, nanowires and nanorods

Thin Solid Films ◽

10.1016/j.tsf.2011.04.177 ◽

2011 ◽

Vol 520 (3) ◽

pp. 932-938 ◽

Cited By ~ 72

Author(s):

S. Öztürk ◽

N. Kılınç ◽

N. Taşaltin ◽

Z.Z. Öztürk

Keyword(s):

Thin Films ◽

Comparative Study ◽

Gas Sensing ◽

Zno Thin Films ◽

Sensing Properties ◽

Gas Sensing Properties

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Grain-size-dependent gas-sensing properties of TiO2 nanomaterials

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2015.01.050 ◽

2015 ◽

Vol 211 ◽

pp. 67-76 ◽

Cited By ~ 28

Author(s):

B. Lyson-Sypien ◽

M. Radecka ◽

M. Rekas ◽

K. Swierczek ◽

K. Michalow-Mauke ◽

...

Keyword(s):

Grain Size ◽

Gas Sensing ◽

Sensing Properties ◽

Size Dependent ◽

Gas Sensing Properties ◽

Tio2 Nanomaterials

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Fabrication and gas sensitivity in heterostructures of ortho-chloropolyaniline–ZnO nanocomposites

RSC Advances ◽

10.1039/c4ra02503b ◽

2014 ◽

Vol 4 (75) ◽

pp. 39844-39852 ◽

Cited By ~ 8

Author(s):

Syed Khasim ◽

Omar A Al-Hartomy

Keyword(s):

Polymer Nanocomposites ◽

Conducting Polymer ◽

Gas Sensing ◽

Gas Sensitivity ◽

Sensing Properties ◽

Gas Sensing Properties

Recently, the gas-sensing properties of conducting polymer nanocomposites have been widely investigated. In this study we report the gas sensing properties of novel ortho- chloropolyaniline–ZnO nanocomposites.

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