Preparation of Thick Inorganic-organic Composite Films by Electrophoretic Sol-gel Deposition Using Organically Modified Silica Particles and Polyethylene Maleate

Hasegawa, Kôichi; Kunugi, Shunsuke; Tatsumisago, Masahiro; Minami, Tsutomu

doi:10.1246/cl.1997.1115

Cited by 10 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has some advantages in the preparation of thick inorganic films such as speed and a possibility to control the film thickness by changing the electrodeposition time. 23 PS latex particles in aqueous suspensions become negatively charged above the isoelectric point at pH ∼ 3.5, whereas the complete deprotonation of the surface groups occurs above pH 7. 36 To increase the negative charge of the PS particles, the colloid solution was adjusted to pH ) 10.5 by the addition of ammonium hydroxide prior to the electrophoretic deposition.…”

Section: Resultsmentioning

confidence: 99%

“…Electrophoretic deposition has been shown to be a suitable method to induce two-dimensional aggregation of monodisperse metal and latex , particles. This technique, although being widely employed for the preparation of films of both latex and silica − particles, was not utilized for the fabrication of ordered 3D colloidal photonic crystals. Very recently, it was demonstrated to accelerate the sedimentation rate of submicrometer-sized silica spheres; however, the quality of the films prepared was not comparable to those obtained by the gravity sedimentation technique.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrophoretic Deposition of Latex-Based 3D Colloidal Photonic Crystals: A Technique for Rapid Production of High-Quality Opals

et al. 2000

View full text Add to dashboard Cite

Three-dimensional colloidal crystals have been grown by electrophoretic deposition on ITO glass supports from aqueous-ethanol colloidal solutions of monodisperse submicrometer-sized negatively charged polystyrene latex spheres. The technique offers the possibility to produce uniform single-crystal colloidal multilayers on the time scale of minutes, which is a drastic acceleration in comparison with the gravity sedimentation technique that needs weeks or even months. SEM and AFM images of colloidal crystals reveal that close-packed 3D fcc ordering of the latex spheres extends over large areas. Electrophoretically deposited colloidal crystals show a pronounced photonic stopband in the visible spectral range in the normal incidence transmission spectra with a position depending on the size of latex spheres. The electrophoretic deposition has also been used for the impregnation of 3D colloidal crystals with luminescent CdTe nanocrystals. The luminescence spectrum of CdTe nanocrystals shows a dip at the wavelengths corresponding to the spectral position of the photonic stopband of the colloidal crystal.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrophoretic Deposition of Latex-Based 3D Colloidal Photonic Crystals: A Technique for Rapid Production of High-Quality Opals

et al. 2000

View full text Add to dashboard Cite

show abstract

“…In this method, silica sols were prepared through the conventional sol-gel process and the silica particles were migrated to a metal substrate by electrophoresis to form the silica particle layer on the substrate. They conducted the electrophoretic silica coating on a pure aluminum, anodized aluminum and stainless-steel sheets, and examined the effects of the preparation conditions on the formation of silica particle layer [10][11][12][13][14][15]. Silica-coated aluminum sheets are the most suitable for the Ad-HEx unit, since aluminum has a high thermal conductance.…”

Section: Introductionmentioning

confidence: 99%

Deposition of thick, rigid and size-controlled silica particle layer on aluminum sheet for water vapor adsorption

Kumita

Oya

Matsui

et al. 2017

Applied Thermal Engineering

View full text Add to dashboard Cite

Toward the development of a new adsorbent heat exchanger of adsorption chillers, silica-coated aluminum sheets were prepared by the combination of sol-gel and electrophoretic deposition techniques. Silica sols were synthesized by the hydrolysis of tetraethoxysilane precursor in an ethanol solution, and then a silica layer was directly formed on an aluminum sheet by electrophoretic deposition of the silica sols. The silica-coated aluminum sheets were subjected to the aging treatment in an ammonia water bath with a DC electric field. This aging treatment was found to be very effective to form rigid silica layer on aluminum sheet. It was found that the obtained layer was composed of monodisperse and spherical submicron-sized silica particles. Sodium dodecyl sulfate (SDS) in the silica sol solution played an important role in controlling the deposited amount of silica particles as well as their sizes. The particle size increased from 0.10 to 0.83 µm with an increase in SDS concentration. For the silica-coated aluminum sheet prepared at a pH value of 10.6 and a SDS concentration of 0.05 mass%, the deposited amount reached a maximum value of 19.8 mg cm-2 , which was much higher than those reported by Kishida et al. (1994). The prepared composites were evaluated for the characteristics of water vapor adsorption through volumetric experiments. The results of adsorption experiments showed that the composite with a higher silica content adsorbed a larger amount of water vapor in the relative pressure range below 0.3.

show abstract

“…Changing the electrodeposition time can control the film thickness. Moreover, the coating can be carried out at the substrates with complex forms [5].…”

Section: Introductionmentioning

confidence: 99%

High-aspect-ratio microstructures fabricated by X-ray lithography of polymethylsilsesquioxane-based spin-on glass thick films

Liu¹,

Cui²,

Coane³

et al. 2003

Microsystem Technologies

View full text Add to dashboard Cite

In this paper, a process for 200 lm high-aspectratio micro-optical (HARM) structures fabricated by deep X-ray lithography (DXRL) of polymethylislesuioane-based spin-on glass (SOG) thick films is presented. The SOG material used in the whole procedures is polymethylsilsesquioxane (GR650), which is a kind of sol-gel derived material and can be cured at a reasonable low temperature (75°C). A technique to cast thick GR650 films was established in the overall process. After consolidation, the GR650 thick films were machined to reach 200 lm uniformly. Then, as negative resists, the GR650 thick films were patterned directly by DXRL. X-ray irradiated regions can be selectively retained with high structural resolution by development in an organic solvent, such as methanol. Parameter screening was done to find minimum and maximum doses needed for patterning/cross-linking, to vary development time, and to explore different film thickness. The whole process is a novel of technique to create HARM structures based on SOG materials without using molds. This technique can be extended to considerably larger structural heights. Surface and bulk compositions of the irradiated films were measured by XPS and Fourier transform infrared spectroscopy. Surface quality by roughness testing system (WYKO RST) was investigated to fabricate the microstructure with a high-accuracy surface.

show abstract

Preparation of Thick Inorganic-organic Composite Films by Electrophoretic Sol-gel Deposition Using Organically Modified Silica Particles and Polyethylene Maleate

Cited by 10 publications

References 4 publications

Electrophoretic Deposition of Latex-Based 3D Colloidal Photonic Crystals: A Technique for Rapid Production of High-Quality Opals

Electrophoretic Deposition of Latex-Based 3D Colloidal Photonic Crystals: A Technique for Rapid Production of High-Quality Opals

Deposition of thick, rigid and size-controlled silica particle layer on aluminum sheet for water vapor adsorption

High-aspect-ratio microstructures fabricated by X-ray lithography of polymethylsilsesquioxane-based spin-on glass thick films

Contact Info

Product

Resources

About