Investigation of sol–gel prepared Ga–Zn oxide thin films for oxygen gas sensing

Vanadium oxide thin films are promising materials for various applications. Much attention has been devoted to thermotropic VO2(M/R) films which exhibit semiconductor-conductor phase transition at 67 °C making them excellent materials for switching applications. Non-thermotropic VO2(B) films are semiconducting and have layered structure which makes them interesting for gas sensing applications. Vanadium pentoxide films are also of great interest for photocatalytic production of H2by H2O decomposition as well as for gas sensing. In this paper the preparation of vanadium oxide thin films by using the spin coating of V2O5·nH2O aqueous gel on Si/SiO2and lime-glass substrates is reported. The as-deposited films were annealed in either air or H2/Ar atmosphere at normal or low pressure in order to prepare V2O5and VO2thin films. The obtained samples were characterized by XRD and SEM.

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Evaluation of structural and mechanical properties of aluminum oxide thin films deposited by a sol–gel process: Comparison of microwave to conventional anneal

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2006.06.013 ◽

2006 ◽

Vol 352 (38-39) ◽

pp. 4093-4100 ◽

Cited By ~ 38

Author(s):

A.R. Phani ◽

S. Santucci

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Aluminum Oxide ◽

Sol Gel ◽

Oxide Thin Films ◽

Process Comparison ◽

Sol Gel Process

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Surface Composite and Morphology Tuning of Tungsten Oxide Thin Films for Acetone Gas Sensing

Chemical Physics Letters ◽

10.1016/j.cplett.2021.138659 ◽

2021 ◽

pp. 138659

Author(s):

Q.A. Drmosh ◽

N.A. Al-Muhaish ◽

Yousif Ahmed Al Wajih ◽

Mir Waqas Alam ◽

Z.H. Yamani

Keyword(s):

Thin Films ◽

Tungsten Oxide ◽

Gas Sensing ◽

Oxide Thin Films ◽

Surface Composite ◽

Tungsten Oxide Thin Films

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The effect of the withdrawal speed on properties of nickel oxide thin films

Zeitschrift für Kristallographie - Crystalline Materials ◽

10.1515/zkri-2019-0028 ◽

2019 ◽

Vol 234 (10) ◽

pp. 647-655

Author(s):

Zohra Nazir Kayani ◽

Atiqa Aslam ◽

Rabia Ishaque ◽

Syeda Nosheen Zahra ◽

Hifza Hanif ◽

...

Keyword(s):

Thin Films ◽

Nickel Oxide ◽

Band Gap ◽

Sol Gel ◽

Average Crystallite Size ◽

Dip Coating ◽

Oxide Thin Films ◽

Withdrawal Speed ◽

Sem Micrograph ◽

Nickel Oxide Thin Films

Abstract Nickel oxide thin films have been prepared by sol-gel dip-coating technique on glass substrate. It is shown that nickel oxide thin films have poly crystalline nature. Nickel oxide thin films exhibit high transmission (39–85%) in the wavelength range of 400–900 nm, strong absorption between 300 and 400 nm wavelengths and decrease of band gap values are in the range 3.69–3.27 eV with increase of withdrawal speed. High band gap at low withdrawal speed is because of the small average crystallite size, which decreases with increase in withdrawal speed. The SEM micrograph shows cubic crystallites and surface of thin films become dense, smooth and homogeneous with an increase in withdrawal speed. Assessment of nickel oxide deposition conditions provides gateway for effective and cheap solar cells.

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