In2O3-CuO NANO-FLAKES PREPARED BY SPRAY PYROLYSIS FOR GAS SENSING APPLICATION

Khalefa, Abed A.; Marei, Jassim M.; Radwan, Hameed Abdulla; Rzaij, Jamal M.

doi:10.15251/djnb.2021.161.197

Cited by 15 publications

(4 citation statements)

References 16 publications

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“…Fig.3reveals increasing the crystallite size (C.S) as the Ts increases. The increase in crystallite size may be due to neighboring small grains joining together by melting their surfaces, resulting in large particles forming as the Ts rises[20]. This conclusion is consistent with the SEM findings, which show that increasing the Ts increases particle size.…”

supporting

confidence: 89%

Nitrogen Dioxide Gas Sensor of In2O3- ZnO Polyhedron Nanostructures Prepared by Spray Pyrolysis

Marei

Khalefa

Abduljabbar³

et al. 2021

JNanoR

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Heterostructure thin films of indium and zinc oxides (IZO) were prepared by spray pyrolysis from an aqueous solution of the precursors at different substrate temperatures (TS). The polycrystalline structure of bixbyite appeared at a low temperature. The crystallinity was enhanced with the emergence of the zinc oxide phase. By increasing the TS to 623 K, the crystallite size was increased. SEM images reveal that the deposited sample at 523 K is composed of irregularly shaped nanoparticles with a lack of links. Increasing the TS to 573 K increases the average particle diameters, and the particles appeared as polyhedrons well connected with cavities between them, which candidates for gas sensing applications. Increasing TS to 623 K resulted in the particles merging. NO2 gas sensor results confirmed the enhancement of IZO sensitivity performance at 573 K. Keywords: Gas sensor, thin film metal oxide, spray pyrolysis, In2O3– ZnO

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confidence: 89%

Nitrogen Dioxide Gas Sensor of In2O3- ZnO Polyhedron Nanostructures Prepared by Spray Pyrolysis

Marei

Khalefa

Abduljabbar³

et al. 2021

JNanoR

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“…As a result, sample D may be the best one for gas sensing applications. The adsorbed oxygen molecules on the film surface form a surface depletion layer, and the increasing/ decreasing depletion layer causes a variation in the potential barrier that impedes the transmission of charge carriers across the grain boundary, resulting in a significant change in electrical conductivity and thus sensor response [31].…”

Section: Resultsmentioning

confidence: 99%

Spray rate effects on the NO₂gas sensor properties of Ni-doped SnO₂nanoflakes

et al. 2022

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Nickel-doped Tin dioxide (NSO) nanostructured thin films were deposited using chemical spray pyrolysis at 450°C at various spray rates. The structural, morphological, and optical properties of the prepared nanostructured thin films were investigated to determine the effect of these parameters on the sensing properties of NSO film. X-ray diffraction revealed a polycrystalline structure with an increasing crystallite size as the deposition rate increased, which resulted in a gradual decrease in the bandgap. The FE-SEM images demonstrate that the deposition rate significantly influences the surface morphology and gas sensitivity performance. The sensitivity of the NO2 gas sensor fabricated employing NSO thin films increased as the deposition rate, and NO2 concentration was increased. At an optimal sensing temperature of 373 K, the maximum sensitivity was 120%, with a response and recovery time of 17 and 19 seconds, respectively.

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“…In 2 O 3 films have high optical transparency and good electrical conductivity, which is sensitive to gases, and doping enables obtaining a selective response [1][2][3][4]. Therefore, In 2 O 3 -based films are promising gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Optical and X-Ray Studies of Indium Oxide Films Deposited by DC Magnetron Sputtering

Tikhii,

Sviridova,

Zhikhareva

et al. 2024

Acta Phys. Pol. A

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The results of our studies on the structure and optical properties of In2O3 films deposited by DC magnetron sputtering onto Al2O3 (012) substrates are summarized. The films differ in terms of deposition time and substrate temperature. X-ray diffraction shows that the position and half-width of the peak related to the (222) plane of the cubic modification of In2O3 depends on the deposition time. Ellipsometric and optical transmission measurements show that the refractive index of films deposited on substrates at room temperature increases in the direction from the substrate to the external interface. The refractive index of the films deposited at a substrate temperature of more than 300 • C is uniform, except for a rough layer on the surface. Annealing eliminates inhomogeneity of the refractive index and decreases the observed band gap for direct transitions. The latter results from a decrease in lattice defects concentration that causes a change in the Burstein-Moss shift. The true value of the band gap is insensitive to annealing. topics: indium oxide films, band gap, optical properties, X-ray diffraction analysis

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In2O3-CuO NANO-FLAKES PREPARED BY SPRAY PYROLYSIS FOR GAS SENSING APPLICATION

Cited by 15 publications

References 16 publications

Nitrogen Dioxide Gas Sensor of In<sub>2</sub>O<sub>3</sub>- ZnO Polyhedron Nanostructures Prepared by Spray Pyrolysis

Nitrogen Dioxide Gas Sensor of In<sub>2</sub>O<sub>3</sub>- ZnO Polyhedron Nanostructures Prepared by Spray Pyrolysis

Spray rate effects on the NO₂gas sensor properties of Ni-doped SnO₂nanoflakes

Optical and X-Ray Studies of Indium Oxide Films Deposited by DC Magnetron Sputtering

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In2O3-CuO NANO-FLAKES PREPARED BY SPRAY PYROLYSIS FOR GAS SENSING APPLICATION

Cited by 15 publications

References 16 publications

Nitrogen Dioxide Gas Sensor of In<sub>2</sub>O<sub>3</sub>- ZnO Polyhedron Nanostructures Prepared by Spray Pyrolysis

Nitrogen Dioxide Gas Sensor of In<sub>2</sub>O<sub>3</sub>- ZnO Polyhedron Nanostructures Prepared by Spray Pyrolysis

Spray rate effects on the NO2gas sensor properties of Ni-doped SnO2nanoflakes

Optical and X-Ray Studies of Indium Oxide Films Deposited by DC Magnetron Sputtering

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Spray rate effects on the NO₂gas sensor properties of Ni-doped SnO₂nanoflakes