Structure of Thin Sol-Gel Coatings Near The Surface of Substrates

1992 ◽  
Vol 271 ◽  
Author(s):  
Hiroshi Hirashima ◽  
Takao Kusaka
Keyword(s):  
Refractive Index ◽  
Silica Glass ◽  
Sol Gel ◽  
Dip Coating ◽  
Oxide Coatings ◽  
Gel Method ◽  
Sol Gel Method ◽  
Glass Substrates ◽  
Interface Dynamic ◽  
Glass Plates

ABSTRUCTThe sol-gel method is one of the most appropriate technologies for the preparation of functional thin oxide coatings. However, few studies on the structure near the interface between sol-gel coatings and substrates have been reported. In this study, the structures of thin TiO2 gel coatings were investigated by XPS in order to elucidate the interaction between the coatings and the glass substrates. TiO2 gel coatings were prepared from Ti-alkoxide by hydrolysis and dip-coating on silica glass plates. Thickness and refractive index measurements were made by ellipsometry. Changes in Ols spectra for the coatings were observed at locations near the interface. Dynamic microhardness measurements for the coatings and the coated glasses were made. These results suggest the formation of a Ti-O-Si bond at the interface.

Properties of TiO2 Thin Film Prepared by Sol-Gel Dip Coating

2015 ◽  
Vol 723 ◽  
pp. 528-531
Author(s):  
Jun Wang ◽  
Ling Yun Bai
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Refractive Index ◽  
Optical Properties ◽  
Band Gap ◽  
Optical Band Gap ◽  
Sol Gel ◽  
Dip Coating ◽  
Gel Method ◽  
Glass Substrates

TiO2 thin films were prepared on glass substrates by sol-gel method. The effect of withdraw speed on the thickness and optical properties of TiO2 thin films was investigated. The films were transparent in the visible wavelength. The thickness of the TiO2 films was increased from 90 nm for the withdraw speed of 1000 μm/s to 160 nm for the withdraw speed of 2000 μm/s. While, The refractive index of the TiO2 thin film decreased from 2.38 to 2.07. It may be due to the porosity of the film was increased. The optical band-gap of the films was around 3.45 eV.

scholarly journals High Refractive Index Silica-Titania Films Fabricated via the Sol–Gel Method and Dip-Coating Technique—Physical and Chemical Characterization

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7125
Author(s):  
Magdalena Zięba ◽  
Katarzyna Wojtasik ◽  
Cuma Tyszkiewicz ◽  
Ewa Gondek ◽  
Jacek Nizioł ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
Root Mean Square Roughness ◽  
Soda Lime Glass ◽  
Gel Method ◽  
Sol Gel Method ◽  
Coating Technique ◽  
Dip Coating Technique

Crack-free binary SiOx:TiOy composite films with the refractive index of ~1.94 at wavelength 632.8 nm were fabricated on soda-lime glass substrates, using the sol–gel method and dip-coating technique. With the use of transmission spectrophotometry and Tauc method, the energy of the optical band gap of 3.6 eV and 4.0 eV were determined for indirect and direct optical allowed transitions, respectively. Using the reflectance spectrophotometry method, optical homogeneity of SiOx:TiOy composite films was confirmed. The complex refractive index determined by spectroscopic ellipsometry confirmed good transmission properties of the developed SiOx:TiOy films in the Vis-NIR spectral range. The surface morphology of the SiOx:TiOy films by atomic force microscopy (AFM) and scanning electron microscopy (SEM) methods demonstrated their high smoothness, with the root mean square roughness at the level of ~0.15 nm. Fourier-transform infrared (FTIR) spectroscopy and Raman spectroscopy were used to investigate the chemical properties of the SiOx:TiOy material. The developed binary composite films SiOx:TiOy demonstrate good waveguide properties, for which optical losses of 1.1 dB/cm and 2.7 dB/cm were determined, for fundamental TM0 and TE0 modes, respectively.

Microstructural, Optical and Electrical Properties of ZnO:Sn Thin Films Deposited by Sol-Gel Method

2013 ◽  
Vol 652-654 ◽  
pp. 519-522
Author(s):  
Jun Chen ◽  
Yue Hui Hu ◽  
Hong Hao Hu ◽  
Yi Chuan Chen
Keyword(s):  
Thin Films ◽  
Electrical Properties ◽  
Sol Gel ◽  
Hexagonal Structure ◽  
Optical And Electrical Properties ◽  
Axis Orientation ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sn Doping ◽  
Glass Substrates

Transparent thin films of Sn-doped ZnO (ZnO:Sn) were deposited onto silica glass substrates by the sol–gel method. The effect of different Sn doping on the crystallinity, structural, optical and electrical properties of ZnO:Sn thin films were investigated by XRD, SEM, UV-VIS spectrophotometer and four-point probe method respectively. Among all of ZnO:Sn thin films in this paper, Sn-doped with 2 at.% exhibited the best properties, the surface demonstrate an accumulative crystallization and hexagonal structure, with a high-preferential c-axis orientation, namely an average transmittance of 90% and the resistivity of 19.6 Ω·cm.

scholarly journals Modification of the titanium implants surface with TiO2 coatings obtained by sol-gel method via dip-coating

2018 ◽  
Vol 226 ◽  
pp. 03014
Author(s):  
Vitaly A. Tarala ◽  
Alexander A. Dolgalev ◽  
Alexander A. Kravtsov ◽  
Irina S. Chikulina ◽  
Boris V. Bukhalov
Keyword(s):  
Titanium Dioxide ◽  
Sol Gel ◽  
Dip Coating ◽  
Titanium Implants ◽  
High Rate ◽  
Drawing Rate ◽  
Gel Method ◽  
Sol Gel Method ◽  
Automated Method ◽  
Tio2 Coatings

Within the framework of the study, TiO2 coatings were obtained by sol-gel method via dip-coating. For the films obtaining, manual drawing the substrate from the solution at a relatively high rate of 30 mm / min and automated drawing from the solution at low drawing rates (from 1 to 10 mm / min) were used. The morphology of coatings has been studied by scanning electron microscopy. The influence of the mode and the rate of drawing of the substrate from the solution on the films morphology was demonstrated. Analysis of the data showed, that the surface morphology of the coatings obtained at lower drawing rates by an automated method is much more homogeneous - the titanium dioxide films completely repeats the topography of the substrate surface, there are practically no fissures. Qualitative coatings of titanium dioxide, completely replicating the surface relief of the substrate, can be obtained by this method. Selection of the substrate drawing rate allows reducing the influence of the substrate topography and avoiding the appearance of crystallization centers, and as a consequence, the appearance of defects in the morphology of coatings, such as fissures or microparticles.

Oxygen diffusion in silica glass prepared by the sol–gel method

1999 ◽  
Vol 111 (12) ◽  
pp. 717-721 ◽  
Author(s):  
F.J Garcı́a-Rodrı́guez ◽  
F Pérez-Robles ◽  
A Manzano-Ramı́rez ◽  
Y.V Vorobiev ◽  
J González-Hernández
Keyword(s):  
Silica Glass ◽  
Oxygen Diffusion ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Preparation of Antibacterial Silver-Doped Silica Glass Microspheres by Sol-Gel Method

2003 ◽  
Vol 240-242 ◽  
pp. 229-232 ◽  
Author(s):  
Kawashita Masakazu ◽  
Shogo Toda ◽  
Tadashi Kokubo ◽  
Noriaki Masuda
Keyword(s):  
Silica Glass ◽  
Sol Gel ◽  
Glass Microspheres ◽  
Gel Method ◽  
Sol Gel Method

Zinc Oxide Thin Film Synthesized by Sol-Gel Method

2020 ◽  
Vol 307 ◽  
pp. 51-57
Author(s):  
Amna Afiqah Nasution Hakim ◽  
Affa Rozana Abdul Rashid ◽  
N. Arsad ◽  
Aisyah Hanim Surani
Keyword(s):  
Thin Film ◽  
Uv Light ◽  
Zinc Acetate Dihydrate ◽  
Sol Gel ◽  
Dip Coating ◽  
Oxide Thin Film ◽  
Gel Method ◽  
Sol Gel Method ◽  
Crystallite Sizes ◽  
Surface Morphologies

ZnO thin films have been prepared by the dip coating sol gel method. Zinc acetate dihydrate, 2-methoxyethanol and monoethanolamine (MEA) were used as precursor, solvent and stabilizer respectively. The synthesized sample was coated on glass substrate as the molarity of the solution was kept constant at 0.1 M. The structural properties and surface morphologies of ZnO thin film were characterized by XRD and FESEM. The optical properties such as transmittance, absorbance, reflectance and refractive index were studied by using UV-Vis. The functional group of the synthesized sample were verified by using FTIR. Average crystallite sizes of the samples were calculated by using Debye-Scherrer's formula. Next, ZnO is coated on POF in order to examine the reaction towards UV light.

scholarly journals Study of TiO2, SnO2 and nanocomposites TiO2:SnO2 thin films prepared by sol-gel method: Successful elaboration of variable–refractive index systems

2020 ◽  
Vol 7 (1) ◽  
pp. 016439 ◽  
Author(s):  
F Medjaldi ◽  
A Bouabellou ◽  
Y Bouachiba ◽  
A Taabouche ◽  
K Bouatia ◽  
...  
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sno2 Thin Films ◽  
Index Systems

Structure and optical properties of transparent Er 3+ -doped CaF 2 –silica glass ceramic prepared by controllable sol–gel method

2016 ◽  
Vol 42 (8) ◽  
pp. 9571-9576 ◽  
Author(s):  
Yiguang Jiang ◽  
Jintai Fan ◽  
Benxue Jiang ◽  
Xiaojian Mao ◽  
Chunlin Zhou ◽  
...  
Keyword(s):  
Optical Properties ◽  
Glass Ceramic ◽  
Silica Glass ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method
Sign in / Sign up

Export Citation Format

Share Document