Growth of zinc oxide nanostructures on glass substrates for ethanol gas sensor application

Emphasis, Katherine M.; Vequizo, Reynaldo M.; Odarve, Majvell Kay G.; Gambe, Jess; Alguno, Arnold C.

doi:10.1088/1757-899x/79/1/012008

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…Also, Abdallah et al (2016aAbdallah et al ( , 2016b obtained the maximum sensitivity of ethanol vapor for higher concentration and also the thickness of the film. The sensitivity maxima for NH41 is in accordance with the study of Emphasis et al (2015) who investigated the response of ZnO nanostructures at two different NH 4 OH concentrations for ethanol gas and related it to the surface morphology. We observe (Figure 8(a)) a gradual decrease in sensitivity from H 2 O, CH 3 OH, C 3 H 6 O and C 2 H 5 OH due to difference in the hydrogen bond energy (polarization).…”

Section: Sensitivity Studysupporting

confidence: 87%

Structural, optical and sensing properties of ZnS thick films deposited by RF magnetron sputtering technique at different powers

Abdallah

Kakhia

Zetoune

2020

WJE

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Purpose This study aims to carry out the deposition of zinc sulfide (ZnS) thick films on glass and silicon (100) substrates using radio frequency (RF) magnetron sputtering method at different powers. Film structure has been analyzed by X-ray diffraction (XRD); the patterns showed that the films possesses a cubic structure with (111) preferred orientation. Photoluminance (PL) intensity of the films has been related to the crystallinity, which is varied with the power. Design/methodology/approach Scanning electron microscope (SEM) images have been used to discover the films’ morphology. The stoichiometry has been confirmed by energy dispersive X-ray spectroscopy (EDX) analysis. MicroRaman spectroscopy has been used to validate the film structure. Gas-sensing studies were carried out by means of a static gas chamber to sense acetone, ethanol, methanol, H2O and NH3 vapor in air ambient. Findings ZnS has a stoichiometric and cubic structure. The band gaps and photoluminance intensity of the films are correlated with the crystallinity, which is varied with the power. The EDX analysis approved the stoichiometry of the prepared films. Acetone, ethanol, humidity (H2O), methanol and NH3 vapor gases were used to justify the sensing properties at 25°C of the thickest ZnS film. Originality/value High-quality ZnS films have been obtained at different powers without annealing. Gases sensing properties at 25°C are justified for deposited ZnS films using acetone, ethanol, humidity (H2O), methanol and NH3 vapor gases. It reveals good response for NH3 and humidity vapors at room temperature; the sensing functioning at this temperature was attractive in recent research.

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Section: Sensitivity Studysupporting

confidence: 87%

Structural, optical and sensing properties of ZnS thick films deposited by RF magnetron sputtering technique at different powers

Abdallah

Kakhia

Zetoune

2020

WJE

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“…Compared with other synthesis methods, ultrasonic spray pyrolysis (USP) 29,30 and chemical bath deposition (CBD) 31,32 have many advantages such as effective stoichiometry control, excellent homogeneity, relatively low processing temperature and low-cost fabrication for synthesizing materials.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical core/shell ZnO/NiO nanoheterojunctions synthesized by ultrasonic spray pyrolysis and their gas-sensing performance

Zhang

Liu

et al. 2016

CrystEngComm

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ZnO nanorod arrays decorated with NiO nanosheets on FTO substrates were prepared via a simple ultrasonic spray pyrolysis process combined with chemical bath method. The synthesized samples were characterized and analyzed by scanning electron microscopy and X-ray diffraction. The hierarchical and porous morphologies of ZnO/NiO core-shell nanoheterojunctions could be controlled by changing the growth time of NiO sheets. The "oriented attachment" and "self-assembly" crystal growth mechanisms were proposed to explain the formation of the ZnO/NiO nanostructures. Sensors based on the ZnO/NiO heterojunction nanostructure were fabricated and investigated for their ethanol-sensing properties. The result indicated that response was about 180% toward 100 ppm ethanol at an operating temperature of 200 °C.The growth approach in this work offers a new technique for the design and synthesis of transition metal oxide hierarchical nanoarrays which are promising for gas sensing applications.

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“…However, the problem of producing optimum nanorods physical structure which vertically growth is it required thorough and precise procedure. There were numerous studies on improving the ZnO nanostructures growth by optimization of the synthesis process such as concentration alterations [17], [18], growth duration [19], growth temperature [20] and solvent variations [21]. Growth duration is one of the most important parameters because it influences the nanorods dimension such as density, length and optical scattering cross section.…”

Section: Introductionmentioning

confidence: 99%

Aligned vertical growth of zinc oxide nanorods on glass substrates using optimum hydrothermal synthesis technique

Jali

Johari

Rahim

et al. 2021

IJEECS

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<div>This paper reported an optimized hydrothermal synthesis technique to grow zinc oxide (ZnO) nanorods vertically on the normal microscope glass. ZnO nanorods exhibited various advantages such as strong binding energy, non toxicity, large surface to volume ratio and versatility for optical detections. However, the growth of nanorods which aligned vertically on the glass substrates is rather complicated. It required a thorough process based on optimized concentration, growth duration, growth temperature and solvent variations. The morphological structure result has shown an exceptional vertical growth of the nanorods on the glass surfaces which increase the nanorods density. The optimized synthesis technique produced high density ZnO nanorods up to 3 𝑥 10<sup>13</sup> nanorods/m2 which is double as compared to conventional synthesis technique.</div>

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Growth of zinc oxide nanostructures on glass substrates for ethanol gas sensor application

Cited by 8 publications

References 9 publications

Structural, optical and sensing properties of ZnS thick films deposited by RF magnetron sputtering technique at different powers

Structural, optical and sensing properties of ZnS thick films deposited by RF magnetron sputtering technique at different powers

Hierarchical core/shell ZnO/NiO nanoheterojunctions synthesized by ultrasonic spray pyrolysis and their gas-sensing performance

Aligned vertical growth of zinc oxide nanorods on glass substrates using optimum hydrothermal synthesis technique

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