ORMOSILS as matrices in inorganic-organic nanocomposites for various optical applications

Li, Chia-Yen; Tseng, Justine Y.; Morita, Kazuki; Lechner, Cornelia; Hu, Yi; Mackenzie, John D.

doi:10.1117/12.132033

Cited by 34 publications

(14 citation statements)

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“…Organic-inorganic hybrid coatings on substrates like glasses have been mainly investigated for development of active optical systems [12][13][14][15]. In the scientific literature sol-gel dip coating techniques on glass have been investigated the most [16].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of organic–inorganic hybrid coating films synthesized from colloidal silica-silane sol

Park

Kang

et al. 2007

J Electroceram

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Colloidal silica/silane sol solutions were prepared in variation with the amount of silane and reaction time. Such sol solutions were synthesized from colloidal silica/tetramethoxysilane(TMOS)/methyltrimethoxysilane (MTMS). Sol solutions were prepared by sol-gel method through two step reactions. In order to understand their physical and chemical properties, dip coating of sol solutions was performed on the glass substrates. The effects of amount of MTMS and reaction time on the formation of coating films were studied. Coating films became transparent as the reaction time increased. Contact angle of coating films increased with increasing the amount of MTMS. Contact angle of coating films decreased with increasing reaction time. Surface free energy of coating films decreased with increasing the amount of MTMS. Surface roughness of coating films decreased with increasing the amount of MTMS when the reaction time was 6 h. When the reaction time was 24, 48 and 72 h, surface roughness of coating films decreased with increasing the amount of MTMS in the beginning, and then increased when further amount of MTMS was added. Plastic hardness increased with increasing the amount of MTMS. Elastic portion inversely decreased with increasing the amount of MTMS. Coating films were stable until 550°C. Thermal degradation temperature of coating films decreased with increasing the amount of MTMS.

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Section: Introductionmentioning

confidence: 99%

Characteristics of organic–inorganic hybrid coating films synthesized from colloidal silica-silane sol

Park

Kang

et al. 2007

J Electroceram

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“…The final products can be properly manipulated to produce porous materials. 1,2 Semiconductor quantum dots and ormosils prepared by means of the sol-gel process allow the production of glasses with enhanced nonlinear properties with applications in optics. [3][4][5][6][7] Many organic-inorganic hybrid materials are prepared by the introduction of polymeric components into silica with the sol-gel process.…”

Section: Introductionmentioning

confidence: 99%

Silicon‐29 and carbon‐13 nuclear magnetic resonance identification of intermediates developed during the formation of a hybrid based on tetraethoxysilane (TEOS) and 4‐[(5‐dichloromethyl)(silyl)pentyloxy]cyanobenzene (DCN)

Trejo‐Durán

Martínez‐Richa

Vera‐Graziano

et al. 2005

J of Applied Polymer Sci

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During the formation of organic-inorganic hybrid materials by the sol-gel process, the observation of multiphase systems at different stages of the reaction is not uncommon. An assessment of the chemical species formed before and after gelation is not an easy task because complex mixtures are generally found in these systems. In this study, the identification of intermediates developed during the formation of a hybrid obtained from tetraethoxysilane (TEOS) and 4-[(5-dichloromethylsilyl)pentyloxy]cyanobenzene monomer has been undertaken. Solution and solid-state 29 Si-and 13 C-NMR spectra, recorded at different degrees of conversion, allow the elucidation of the mechanism of hybrid formation. 4-[(5-dichloromethylsilyl)pentyloxy]cyanobenzene, (DCN), DCN-TEOS cyclosiloxanes and low-molecularweight linear copolysiloxanes are formed in the early stages of the process and before gelation occur. Before the gel is formed, cyclic species undergo an acid-catalyzed ring-opening copolymerization with silica to produce a random copolymer. Other intermediates of the Q ij type (where Q indicates a four-functional silicon, the first subscript indicates the number of siloxane bridges connected to the silicon site, and the second subscript indicates the number of silanol groups) that develop before the gel is formed have also been identified. Spectral peak patterns of the final hybrid, observed in solid-state 29 Si and 13 C-NMR spectra, are also discussed.

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“…Different physical appearances, such as monoliths, coatings, fibers, and films, can be conveniently produced by this method. The final products can be properly manipulated to produce porous materials 1, 2. Semiconductor quantum dots and ormosils prepared by means of the sol–gel process allow the production of glasses with enhanced nonlinear properties with applications in optics 3–7…”

Section: Introductionmentioning

confidence: 99%

“…Many organic–inorganic hybrid materials are prepared by the introduction of polymeric components into silica with the sol–gel process. In some cases, a copolymer due to the reaction between an initial monomer species and silica is formed 2, 8–14. Chemical reactions observed during the sol–gel process involve hydrolysis to form oxide particles in a liquid phase, followed by polycondensation and crosslinking reactions.…”

Section: Introductionmentioning

confidence: 99%

Results of the 2006 Innsbruck International Consensus Conference on intraperitoneal chemotherapy in patients with ovarian cancer

Marth

Walker

Barakat

et al. 2007

Cancer

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During the formation of organic–inorganic hybrid materials by the sol–gel process, the observation of multiphase systems at different stages of the reaction is not uncommon. An assessment of the chemical species formed before and after gelation is not an easy task because complex mixtures are generally found in these systems. In this study, the identification of intermediates developed during the formation of a hybrid obtained from tetraethoxysilane (TEOS) and 4‐[(5‐dichloromethylsilyl)pentyloxy]cyanobenzene monomer has been undertaken. Solution and solid‐state 29Si‐ and 13C‐NMR spectra, recorded at different degrees of conversion, allow the elucidation of the mechanism of hybrid formation. 4‐[(5‐dichloromethylsilyl)pentyloxy]cyanobenzene, (DCN), DCN–TEOS cyclosiloxanes and low‐molecular‐weight linear copolysiloxanes are formed in the early stages of the process and before gelation occur. Before the gel is formed, cyclic species undergo an acid‐catalyzed ring‐opening copolymerization with silica to produce a random copolymer. Other intermediates of the Qij type (where Q indicates a four‐functional silicon, the first subscript indicates the number of siloxane bridges connected to the silicon site, and the second subscript indicates the number of silanol groups) that develop before the gel is formed have also been identified. Spectral peak patterns of the final hybrid, observed in solid‐state 29Si and 13C‐NMR spectra, are also discussed. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 520–531, 2006

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ORMOSILS as matrices in inorganic-organic nanocomposites for various optical applications

Cited by 34 publications

References 0 publications

Characteristics of organic–inorganic hybrid coating films synthesized from colloidal silica-silane sol

Characteristics of organic–inorganic hybrid coating films synthesized from colloidal silica-silane sol

Silicon‐29 and carbon‐13 nuclear magnetic resonance identification of intermediates developed during the formation of a hybrid based on tetraethoxysilane (TEOS) and 4‐[(5‐dichloromethyl)(silyl)pentyloxy]cyanobenzene (DCN)

Results of the 2006 Innsbruck International Consensus Conference on intraperitoneal chemotherapy in patients with ovarian cancer

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