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

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.

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Optical properties of ZnO/silica nanocomposites prepared by sol-gel method and deposited by dip-coating technique

Physics Procedia ◽

10.1016/j.phpro.2009.11.013 ◽

2009 ◽

Vol 2 (3) ◽

pp. 701-705 ◽

Cited By ~ 14

Author(s):

D. Djouadi ◽

A. Chelouche ◽

A. Aksas ◽

M. Sebais

Keyword(s):

Optical Properties ◽

Sol Gel ◽

Dip Coating ◽

Gel Method ◽

Sol Gel Method ◽

Coating Technique ◽

Silica Nanocomposites ◽

Dip Coating Technique

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Fluorescence property and dissolution site of Er3+ in Ta2O5 film prepared by sol-gel method and dip-coating technique

Journal of Materials Research ◽

10.1557/jmr.2004.19.2.667 ◽

2004 ◽

Vol 19 (2) ◽

pp. 667-675 ◽

Cited By ~ 9

Author(s):

Noriyuki Wada ◽

Michiyo Kubo ◽

Nobuko Maeda ◽

Maegawa Akira ◽

Kazuo Kojima

Keyword(s):

Heat Treatment ◽

Sol Gel ◽

Dip Coating ◽

Treatment Temperature ◽

Fluorescence Property ◽

Gel Method ◽

Sol Gel Method ◽

Coating Technique ◽

Ta2o5 Film ◽

Dip Coating Technique

Ta2O5–xEr2O3 (TE) films were produced by a sol-gel method and a dip-coating technique with heat treatment at 600–1000 °C. Their powders were also prepared from the same sol. The Er3+ fluorescence property of the TE films containing various contents of Er3+ was measured as a function of the heat-treatment temperature. In crystallized films, the Er3+ fluorescence was observed because water-related residues (Ta–OH and H2O) and carbon-related residues (–CH3, –CH2–, –(C ⁼ O)–, and C≡C–H) were removed from the films. It is shown from infrared absorption spectroscopy that Ta–O− and Ta ⁼ O structures dissolve the Er3+ ions selectively and play a role in dispersing the Er3+. The strongest Er3+ fluorescence is observed in the TE film with 2 mol% of Er2O3 because of its highest ability to disperse the Er3+ ions.

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Refractive Index and Extinction Coefficient of ZnO:Al Thin Films Derived by Sol-Gel Dip Coating Technique

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.334-335.290 ◽

2013 ◽

Vol 334-335 ◽

pp. 290-293 ◽

Cited By ~ 5

Author(s):

N. Baydogan ◽

T. Ozdurmusoglu ◽

Huseyin Cimenoglu ◽

A.B. Tugrul

Keyword(s):

Thin Films ◽

Refractive Index ◽

Extinction Coefficient ◽

Annealing Temperature ◽

Sol Gel ◽

Dip Coating ◽

Optical Parameters ◽

Coating Technique ◽

Glass Substrates ◽

Dip Coating Technique

Doped ZnO:Al thin films were deposited on glass substrates by the solgel dip technique. Optical parameters such as the refractive index and the extinction coefficient tend to change with increasing annealing temperature.

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

MRS Proceedings ◽

10.1557/proc-271-443 ◽

1992 ◽

Vol 271 ◽

Cited By ~ 2

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.

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Silver DopedTiO2Nanostructure Composite Photocatalyst Film Synthesized by Sol-Gel Spin and Dip Coating Technique on Glass

International Journal of Photoenergy ◽

10.1155/2008/628713 ◽

2008 ◽

Vol 2008 ◽

pp. 1-11 ◽

Cited By ~ 21

Author(s):

Mojtaba Nasr-Esfahani ◽

Mohammad Hossein Habibi

Keyword(s):

Methyl Orange ◽

Anatase Phase ◽

Sol Gel ◽

Composite Films ◽

Methyl Cellulose ◽

Dip Coating ◽

Silver Addition ◽

Coating Technique ◽

Xrd Diffraction ◽

Dip Coating Technique

New composite films (P25SGF-MC-Ag, MPC500SGF-MC-Ag, and ANPSGF-MC-Ag) have been synthesized by a modified sol-gel method using different particle sizes ofTiO2powder and silver addition. NanostructureTiO2/Ag composite thin films were prepared by a sol-gel spin and dip coating technique. while, by introducing methyl cellulose (MC) porous,TiO2/Ag films were obtained after calcining at a temperature of 500°C. The as-preparedTiO2andTiO2/Ag films were characterized by X-ray diffractometry, and scanning electron microscopy to reveal the structural and morphological differences. In addition, the photocatalytic properties of these films were investigated by degrading methyl orange (MO) under UV irradiation. After 500°C calcination, the microstructure of MC-TiO2film without Ag addition exhibited a microstructure, while significant sintering effect was noticed with Ag additions and the films exhibited a porous microstructure. Nanostructure anatase-phaseTiO2can be observed with respect to the sharpening of XRD diffraction peaks. The photodegradation of porousTiO2deposited with5×10−4 mol Ag exhibited the best photocatalytic efficiency, where 69% methyl orange can be decomposed after UV exposure for 1 hour.

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Laser Densification of Prepared SiO2 Sol-Gel Thin Films

Baghdad Science Journal ◽

10.21123/bsj.15.2.234-237 ◽

2018 ◽

Vol 15 (2) ◽

pp. 234-237

Author(s):

Baghdad Science Journal

Keyword(s):

Thin Films ◽

Diode Laser ◽

Sol Gel ◽

Dip Coating ◽

Gel Method ◽

Sol Gel Method ◽

Laser Densification ◽

Infrared Spectrometer ◽

Xrd Patterns ◽

Dip Coating Technique

SiO2 nanostructure is synthesized by the Sol-Gel method and thin films are prepared using dip coating technique. The effect of laser densification is studied. X-ray Diffraction (XRD), Fourier Transformation Infrared Spectrometer (FTIR), and Field Emission Scanning Electron Microscopy (FESEM) are used to analyze the samples. The results show that the silica nanoparticles are successfully synthesized by the sol-gel method after laser densification. XRD patterns show that cristobalite structure is observed from diode laser (410 nm) rather than diode laser (532 nm). FESEM images showed that the shape of nano silica is spherical and the particles size is in nano range (? 100 nm). It is concluded that the spherical nanocrystal structure of silica thin films is successfully densified by Doide laser (410 nm).

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Development of Adhesive, Bioactive and Antibacterial Titania Sol-Gel Coating on Titanium Substrate by Dip-Coating Technique

Coatings ◽

10.3390/coatings11020243 ◽

2021 ◽

Vol 11 (2) ◽

pp. 243

Author(s):

Diana Horkavcová ◽

Quentin Doubet ◽

Gisèle Laure Lecomte-Nana ◽

Eva Jablonská ◽

Aleš Helebrant

Keyword(s):

Simulated Body Fluid ◽

Body Fluid ◽

Sol Gel ◽

Titanium Substrate ◽

Dip Coating ◽

Coating Technique ◽

Metal Implants ◽

Excellent Adhesion ◽

Titania Sol ◽

Dip Coating Technique

The sol-gel method provides a wide variety of applications in the medical field. One of these applications is the formation of coatings on the metal implants. The coatings containing specific additive can enhance or improve the existing surface properties of the substrate. In this work, titania sol-gel coatings were doped with two forms of silver (AgNO3, Ag3PO4) and synthetic hydroxyapatite and applied on the titanium samples by dip-coating technique. After drying and slow firing, all coatings were characterized with scanning electron microscopy. Thin coatings were successfully prepared with excellent adhesion to the substrate (measured by ASTM D 3359-2), despite cracks. Coatings containing silver and hydroxyapatite demonstrated a 100% antibacterial effect against Escherichia coli after 24 h. The bioactivity of the coatings containing hydroxyapatite tested in modified simulated body fluid under static-dynamic conditions was confirmed by bone-like hydroxyapatite precipitation. To better understand the interaction of the coatings with simulated body fluid (SBF), changes of Ca2+ and (PO4)3− ions concentrations and pH values were studied.

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Study on the Influence Factors of ZnFe2O4 and TiO2 Composite Films Photoelectrocatalytic Properties

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.287-290.2199 ◽

2011 ◽

Vol 287-290 ◽

pp. 2199-2202

Author(s):

Gui Qin Hou ◽

Wen Li Zhang ◽

Shui Jing Gao ◽

Xiao Yan Wang

Keyword(s):

Methyl Orange ◽

Sol Gel ◽

Composite Films ◽

Influence Factors ◽

Nanocomposite Films ◽

Gel Method ◽

Sol Gel Method ◽

Conductive Glass ◽

Photocatalytic Activities ◽

Film Layer

The ZnFe2O4 and TiO2 nanocomposite films was prepared by Sol-Gel method on conductive glass, and the influence factors of it’s photoelectrocatalytic performence such as the film layer, pole and voltage was investigated. The results indicated that: the photocatalytic effects of composite films with ZnFe2O4+ TiO2+ ZnFe2O4 was the best. The decomposing ratio of methyl orange with the photoelectrocatalysis of composite films at voltage 0.2-6V all increased unstably.At the same time, the distance from films to pole plank also had the effects on the photocatalytic activities of the films.

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

MATEC Web of Conferences ◽

10.1051/matecconf/201822603014 ◽

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.

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