The Structural and Surface Morphology of Annealed ZnO Films

2014 ◽  
Vol 903 ◽  
pp. 73-77
Author(s):  
Peh Ly Tat ◽  
Karim bin Deraman ◽  
Rosli Hussin ◽  
Wan Nurulhuda Wan Shamsuri ◽  
Zuhairi Ibrahim
Keyword(s):  
Annealing Temperature ◽  
Sol Gel ◽  
Dip Coating ◽  
Zno Films ◽  
Axis Orientation ◽  
Force Microscopy ◽  
Glass Substrates ◽  
Coating Method ◽  
Afm Micrographs ◽  
Dip Coating Method

ZnO thin films were deposited on the glass substrates via the sol-gel dip coating method. The films were annealed at various temperatures ranging from 350 °C to 550 °C. X-ray diffraction (XRD), and atomic force microscopy (AFM) were used to investigate the effect of annealing temperature on the structural and morphology properties of the films. The as grown films exhibited amorphous pattern while annealed films were polycrystalline structure with (002) preferential growth along c-axis orientation. The AFM micrographs revealed that the RMS roughness of the films increased as the annealing temperature increased. The grain size was ranging from 32.1 nm to 176.0 nm as the annealing temperature increased from 350 °C to 450 °C and decreased to 56.1 nm for 550 °C.

Microstructural and Electrical Conductivity of Annealed ZnO Thin Films

2014 ◽  
Vol 970 ◽  
pp. 120-123 ◽  
Author(s):  
Peh Ly Tat ◽  
Karim bin Deraman ◽  
Wan Nurulhuda Wan Shamsuri ◽  
Rosli Hussin ◽  
Zuhairi Ibrahim
Keyword(s):  
Thin Films ◽  
Low Cost ◽  
Sol Gel ◽  
Hexagonal Wurtzite Structure ◽  
Dip Coating ◽  
Zno Thin Films ◽  
Zno Films ◽  
Axis Orientation ◽  
Glass Substrates ◽  
Afm Micrographs

Undoped nanocrystalline ZnO thin films were deposited onto the glass substrates via the low cost sol-gel dip coating method. The as-grown ZnO films were annealed at the temperatures ranging from 400 °C to 550 °C. The X-ray diffraction (XRD) pattern revealed that the annealed ZnO films were polycrystalline with hexagonal wurtzite structure and majority preferentially grow along (002) c-axis orientation. Atomic force microscopy (AFM) micrographs showed the improvement of RMS roughness and grain size as annealing temperature increased. The ZnO films that annealed at 500 oC exhibited the lowest resistivity value.

Porous SiO2/TiO2 Bilayer Antireflection Coatings with Self-Cleaning Capacity

2011 ◽  
Vol 233-235 ◽  
pp. 2970-2974 ◽  
Author(s):  
Ruo Yu Chen ◽  
Jian Wu Wang ◽  
Hong Ning Wang ◽  
Wei Yao ◽  
Jing Zhong
Keyword(s):  
Methyl Orange ◽  
Mechanical Strength ◽  
Sol Gel ◽  
Dip Coating ◽  
Antireflection Coatings ◽  
Force Microscopy ◽  
Atomic Force ◽  
Coating Method ◽  
Self Cleaning ◽  
Dip Coating Method

The porous SiO2/TiO2bilayer antireflection coatings with self-cleaning capacity have been prepared by a sol-gel dip-coating method, the surfactant template, Pluronic F123 (PF123) was added to the sol as a pore generator. The performances of the coatings were analyzed with ultraviolet visible spectrophotometer (UV-Vis), scanning electron microscope (SEM) and atomic force microscopy (AFM). The self-cleaning function of coatings was evaluated by means of photocatalytic degradation of methyl orange in aqueous solution, and mechanical strength of the coatings has also been studied. The results indicate that the average transmittance of porous SiO2/TiO2coating increases by 6% as compared to uncoated glass, the coating has a small particle size, a porous structure and a low roughness. After illuminated by ultraviolet light for 3 h, the 5 mg/L methyl orange can be degraded by 56.5%. In addition, the coating has an excellent mechanical strength.

scholarly journals Characteristics and optical properties of Fe3+ doped SiO2/TiO2 thin films prepared by the sol-gel dip-coating method

2013 ◽  
Vol 16 (1) ◽  
pp. 92-100
Author(s):  
Chien Mau Dang ◽  
Dam Duy Le ◽  
Tam Thi Thanh Nguyen ◽  
Dung Thi My Dang
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Tio2 Thin Films ◽  
Water Contact ◽  
Glass Substrates ◽  
Coating Method ◽  
Dip Coating Method

In this study, we have successfully synthesized Fe3+ doped SiO2/TiO2 thin films on glass substrates using the sol-gel dip-coating method. After synthesizing, the samples were annealed at 5000C in the air for 1 hour. The characteristics and optical properties of Fe3+ doped SiO2/TiO2 films were then investigated by X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-vis) and Fourier transform infrared spectroscopy (FT-IR). An antifogging ability of the glass substrates coated with the fabricated film is investigated and explained by a water contact angle under visible-light. The analyzed results also show that the crystalline phase of TiO2 thin films comprised only the anatase TiO2, but the crystalline size decreased from 8.8 to 5.9 nm. We also observed that the absorption edge of Fe3+- doped SiO2/TiO2 thin films shifted towards longer wavelengths (i.e. red shifted) from 371.7nm to 409.2 nm when the Fe3+-doped concentration increased from 0 to 1 % mol.

Improving of Tribological Properties of Nanocomposites Sol-Gel Thin Films by Fluorocyclophosphazene Derivatives

2005 ◽  
Author(s):  
G. Celichowski ◽  
K. Chrobak
Keyword(s):  
Thin Films ◽  
Tribological Properties ◽  
Sol Gel ◽  
Dip Coating ◽  
Rf Plasma ◽  
Good Thermal Stability ◽  
Force Microscopy ◽  
Coating Method ◽  
Dip Coating Method ◽  
Sol Gel Films

Fluorocyclophospazenes’ derivatives were used as modifiers for improving tribological properties of thin films prepared by sol-gel technique. Thin films were made on the base of aminopropyltriethoxysilane (APTS). All films were deposited by dip-coating method and post-treated by heat, UV radiation and low pressure of RF plasma. Chemical changes in sol-gel films during all steps of post-treatments and modifications were monitored by FT-IR spectroscopy and SIMS spectrometry. Topographies of modified surfaces were imaged by Atomic Force Microscopy (AFM). After final modification significant improvements of frictional properties were observed as well as their very good thermal stability.

Effect of the Solvent Effect of the Solvent Used During the Preparation of SnO2 Nanoparticulated Methane Sensor

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2701-2706
Author(s):  
Guillermo Carbajal-Franco ◽  
Pedro A. Ortiz-Vázquez ◽  
Alejandro Ávila-García
Keyword(s):  
Gas Sensing ◽  
Sol Gel ◽  
Dip Coating ◽  
Electric Response ◽  
Glass Substrates ◽  
Metallic Oxides ◽  
Sol Gel Process ◽  
Coating Method ◽  
Different Temperatures ◽  
Dip Coating Method

ABSTRACTGas monitoring is a relevant activity for industrial and domestic applications due to usage of dangerous gases as methane, which has been increasingly used as domestic and industrial fuel. In this field of research, metallic oxides such as SnO2, ZnO and Fe2O3 have been widely studied, but we are far from reaching the total understanding of all the parameters that can be varied; in order to improve the gas sensing properties of the metallic oxides. In this work, we present the change of properties derived from using different solvents during the preparation of SnO2 nanoparticles via the sol-gel process. The nanoparticles suspended in two different solvents were deposited on glass substrates by the dip-coating method. The addition of Sb as a dopant was studied at two different Sb:Sn ratios of 1:99 and 1:2. SEM showed differences in the nanostructured topology of the samples and EDS analysis was performed to determine the elemental composition of the samples and the ratios of doping. XRD spectroscopy was used to determine the phase of the materials and the crystallite size. Measurements of the electric response of the coatings to methane, under controlled conditions at different temperatures, were carried out and curves of sensitivity versus temperature were obtained.

Effects of Annealing on Properties of (Na,Mg):ZnO Thin Films Deposited by Sol-Gel Method

2014 ◽  
Vol 898 ◽  
pp. 33-36 ◽  
Author(s):  
Cai Zhen Zhang ◽  
Yong Gang Chen ◽  
Su Liu
Keyword(s):  
Annealing Temperature ◽  
Sol Gel ◽  
Zno Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
Coating Method ◽  
Method Effects ◽  
Structural Surface ◽  
Co Doped

Na/Mg co-doped (Na,Mg):ZnO films were fabricated on pyrex glass substrates by sol-gel spin-coating method. Effects of annealing on properties of the films were particularly investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmittance spectra. The internal stress of the films annealed at different temperature was calculated. Experimental and analytical results show that some NaCl freeze-out derivatives will appear on films when the annealing temperature is too low, with the increasing annealing temperature, the c-axis tensile stress is sharply decreased first, then the c-axis stress was changed into press stress and its value is increased continuously, so the structural, surface and the optical properties of the films improve first and deteriorate afterwards.

Effect of annealing temperature on nanocrystalline TiO2 thin films prepared by sol–gel dip coating method

Optik ◽  
2013 ◽  
Vol 124 (23) ◽  
pp. 6201-6204 ◽  
Author(s):  
A. Ranjitha ◽  
N. Muthukumarasamy ◽  
M. Thambidurai ◽  
R. Balasundaraprabhu ◽  
S. Agilan
Keyword(s):  
Thin Films ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Dip Coating ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2 ◽  
Coating Method ◽  
Dip Coating Method

Influence of Multi-Round Annealing Process on the Optical and Electrical Properties of Sol-Gel Derived TiO2-δ Films

2012 ◽  
Vol 465 ◽  
pp. 165-171
Author(s):  
Jin Ming Liu ◽  
Xiao Ru Zhao ◽  
Li Bing Duan ◽  
Xiao Jun Bai ◽  
Ning Jin ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxygen Vacancies ◽  
Sol Gel ◽  
Dip Coating ◽  
Annealing Process ◽  
Visible Range ◽  
Tio2 Thin Films ◽  
Glass Substrates ◽  
Coating Method ◽  
Dip Coating Method

Anatase TiO2- thin films on glass substrates were prepared by sol-gel dip-coating method. We designed a multi-round annealing process which was under the air pressure of 5 Pa and then 5×10-2 Pa for one hour each at 550 °C, and such process was repeated for three times. The special designed annealing process can obviously improve the conductivity of the udoped TiO2- thin films. The minimum resistivity of the undoped TiO2- thin films reached 0.8 Ω cm after being treated by the multi-round annealing process. It was demonstrated that such annealing process was an effective way to increase the defects in TiO2- thin films such as oxygen vacancies. The average transmittances of the films were approximately 60~80% in the visible range with the forbidden gaps of 3.25~3.35 eV. After the multi-round annealing process, the optical forbidden gaps of the films became narrowed slightly, which might be also related to the defects introduced during the multi-annealing process.

Investigation on the Structural and Optical Properties of Nanocrystalline TiO2 Thin Films

2013 ◽  
Vol 678 ◽  
pp. 103-107 ◽  
Author(s):  
Arumugam Ranjitha ◽  
Natarajan Muthukumarasamy ◽  
Santhanam Agilan ◽  
Mariyappan Thambidurai ◽  
Rangasamy Balasundraprabhu ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Dip Coating ◽  
Band Gap Energy ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2 ◽  
Structural Investigations ◽  
Force Microscopy ◽  
Coating Method ◽  
Dip Coating Method

Nanocrystalline TiO2 thin films were prepared by sol-gel dip coating method. The structural investigations were carried out using x-ray diffraction technique. Anatase TiO2 thin films with tetragonal phase were obtained and the grain size was observed to lie in the range of 21-25 nm. Analysis on the surface topography of prepared films have been carried out using atomic force microscopy (AFM). The band gap energy is calculated from the absorption spectra of TiO2 films and is found to lie in the range 3.3 to 3.7 eV.

scholarly journals Highly c-axis Oriented ZnO Thin Films by Sol-gel Method

2021 ◽  
Author(s):  
Taner Kutlu ◽  
Necdet H. Erdogan ◽  
Nazmi Sedefoglu ◽  
Hamide Kavak
Keyword(s):  
Thin Films ◽  
Annealing Temperature ◽  
Optical Measurement ◽  
Sol Gel ◽  
Zno Films ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Before And After ◽  
Coating Method

Abstract This study reports the effect of annealing temperature on the structural, morphological, and optical properties of ZnO (Zinc Oxide) thin films deposited on a glass substrate by the sol-gel spin coating method. Those properties of ZnO were examined with UV-Vis, Fourier transform infrared (FTIR) and Raman spectroscopy, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), and X-ray diffraction (XRD), before and after annealing. XRD results revealed that all the samples had a highly c-axis oriented wurtzite structure. A 1 (LO) mode in Raman spectra also confirmed the highly oriented ZnO films. Optical measurement indicated that transmittance of the films was above %85, and the optical band gap slightly decreased with the increasing annealing temperature from 350 to 550 °C. Morphological analysis displayed that increasing annealing temperature improved surface morphology and enlarged the grain size from 2-3 nm for as-deposited samples to 150 nm for annealed at 550 °C.

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