Microstructure Control of Porous Alumina Film Using Aqueous Sol Containing Trehalose

2007 ◽  
Vol 350 ◽  
pp. 7-10 ◽  
Author(s):  
Takeshi Miki ◽  
Kaori Nishizawa ◽  
Kazuyuki Suzuki ◽  
Kazumi Kato
Keyword(s):  
Porous Alumina ◽  
Dip Coating ◽  
Alumina Film ◽  
Coating Solution ◽  
Coating Technique ◽  
Glass Substrates ◽  
Alumina Films ◽  
Maximum Thickness ◽  
Alumina Particles ◽  
Dip Coating Technique

To fabricate porous and thick alumina films, we prepared an aqueous alumina hydroxide sol containing trehalose. The alumina films were deposited by dip-coating technique on glass substrates and heating at 500 °C. The maximum thickness of the film obtained by one-run dip-coating using the sol containing trehalose was over 1000 nm. The film was an aggregate of alumina particles with a diameter of 20-40 nm and pores were interstices between the particles. The porosity of alumina film can be controlled in the range of 48-65 % by changing trehalose concentration in the dip-coating solution.

Preparation and Characterization of Porous Alumina Film Using Sol Containing PEG

2006 ◽  
Vol 320 ◽  
pp. 159-162 ◽  
Author(s):  
Takeshi Miki ◽  
Kaori Nishizawa ◽  
Kazuyuki Suzuki ◽  
Kazumi Kato
Keyword(s):  
Porous Alumina ◽  
Dip Coating ◽  
Poly Ethylene Glycol ◽  
Alumina Film ◽  
Glass Substrates ◽  
Alumina Films ◽  
Poly Ethylene ◽  
Dip Coating Technique ◽  
Hydrolysis Of

To obtain porous alumina films, the precursor sol was prepared by hydrolysis of Al isopropoxide and then mixing with poly(ethylene glycol) (PEG). The porous alumina films were fabricated by dip-coating technique on glass substrates and heating at 500 °C. The film was composed of nano sized particles (30-50 nm). The maximum thickness of the film prepared by one-run dip-coating was ca. 1000 nm. The film had humidity-sensitive electrical resistance at room temperature.

Photocatalytic Activity of Porous TiO2 Film Prepared by Dip-Coating Technique Using Sol Containing Trehalose

2009 ◽  
Vol 620-622 ◽  
pp. 691-694 ◽  
Author(s):  
Takeshi Miki ◽  
Kaori Nishizawa ◽  
Eiji Watanabe ◽  
Hiroshi Taoda
Keyword(s):  
Photocatalytic Activity ◽  
Tio2 Film ◽  
Uv Light ◽  
Dip Coating ◽  
Coating Solution ◽  
Coating Technique ◽  
Glass Substrates ◽  
Trehalose Dihydrate ◽  
Dip Coating Technique ◽  
Hydrolysis Of

To obtain porous and thick TiO2 film, the precursor sol was prepared by hydrolysis of Ti isopropoxide and then complexed with trehalose dihydrate. The porous TiO2 film was fabricated by dip-coating technique on quartz glass substrates using this sol. The TiO2 films were calcined at 500-700 °C. The photocatalytic activity of the films was evaluated by examining decomposition of methylene blue in aqueous solution under UV light irradiation. The TiO2 film prepared from the sol with trehalose was more active than TiO2 film prepared from the sol without trehalose. The trehalose addition to the dip-coating solution was effective in improving the photocatalytic activity of the TiO2 film.

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

2013 ◽  
Vol 334-335 ◽  
pp. 290-293 ◽  
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.

Single Layer Brushite Coating onto Stainless Steel Substrate Using Dip-Coating Technique

2011 ◽  
Vol 399-401 ◽  
pp. 2004-2007
Author(s):  
Ahmad Mulia Hafizayatullah Amiruddin ◽  
Roslinda Shamsudin ◽  
Azman Jalar ◽  
Muhammad Azmi Abdul Hamid
Keyword(s):  
Stainless Steel ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Single Layer ◽  
Dip Coating ◽  
Coating Solution ◽  
Coating Technique ◽  
Free Film ◽  
Stirring Time ◽  
Dip Coating Technique

In this study, brushite (CaHPO4·2H2O) has been coated on a stainless steel substrate using dip-coating technique. This technique offers uniform and crack-free film over entire surface of the substrate and easy to perform. Layer of brushite coated surround the stainless steel is very much affected by the parameters used namely concentration of the coating solution, speed of coating, stirring time etc. Results show that a smooth thin film is obtained when 1.5M of brushite solution is used and stirred at 50 °C for 2 hours. The optimum withdrawal rate used was 1.5 mm s-1. Thickness of the coating obtained was around 51.37 µm which would enable the apatite to growth.

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

Coatings ◽  
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.

Structural and Electrical Properties of Mn-Co-Ni-O Thin Films Prepared by Dip-Coating Technique

1992 ◽  
Vol 271 ◽  
Author(s):  
Shoji Kaneko ◽  
Naoto Mazuka ◽  
Tamotsu Yamada
Keyword(s):  
Thin Films ◽  
Spinel Phase ◽  
Dip Coating ◽  
Atomic Ratio ◽  
Heating Process ◽  
Electric Resistance ◽  
Glass Substrates ◽  
Methanol Solutions ◽  
Structural And Electrical Properties ◽  
Dip Coating Technique

ABSTRACTMn-Co-Ni-O thin films of metal atomic ratio 3.0 : 1.9 : 1.0 were prepared on glass substrates from methanol solutions of the corresponding metal β-diketonates by dip-coating. As-prepared films were heated at 900°C for 1 h mostly after being calcined at 450°C for 5 min. The film thickness increased with increasing concentration of the solution as well as the number of lifting times. However, the effect was not apparent with the sample prepared without calcination. The prepared films were observed to crystallize into a complicated spinel phase by the heating process at 900°C for 1 h. The surface of the dense film composed of particles of about 0.2 μm diameter, was almost even. The thermal and aging responses of electric resistance showed the film to be a good material as a thermistor.

Synthesis and Electrochemical Behavior of Ceria Based Bi-Layer Films by Dip Coating Technique

2015 ◽  
Vol 15 (1) ◽  
pp. 360-367
Author(s):  
M. Karl Chinnu ◽  
K. Vijai Anand ◽  
R. Mohan Kumar ◽  
T. Alagesan ◽  
R. Jayavel
Keyword(s):  
Electrochemical Behavior ◽  
Dip Coating ◽  
Coating Technique ◽  
Dip Coating Technique
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