Sol-gel processed silica/titania/ÿ-Glycidoxypropyltrimethoxysilane composite materials for photonic applications

Que, Wenxiu; Zhou, Yan; Lam, Yee Loy; Chan, Yuen Chuen; Tan, H.S.; Tan, Teng-Hooi; Kam, C. H.

doi:10.1007/s11664-000-0172-7

Cited by 17 publications

(6 citation statements)

References 21 publications

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“…Measurements of a few thin film samples led to an average surface roughness root mean square (rms) of 0.724 nm. It was comparable to several other works that were recorded to be smaller than 1 nm , and much better than those reported in , which were around 2 to 6 nm. This finding indicates the possibility to produce optical couplers based on hybrid VTES material that would demonstrate low surface scattering loss.…”

Section: Resultssupporting

confidence: 91%

Multimode interference couplers based on photosensitive hybrid sol‐gel material

Abdullah

Ibrahim

Noor

et al. 2014

Micro & Optical Tech Letters

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Multimode interference couplers (optical splitter and cross coupler) based on photosensitive hybrid sol‐gel material derived from vinyltriethoxysilane, tetraethoxysilane, and tetrabutoxytitanate precursors are demonstrated. The couplers are fabricated on quartz substrate. A cost effective chemical etching technique is used in the couplers fabrication process to take advantage of the photosensitive nature of the hybrid material. The output power imbalance is measured to be less than 0.8 dB while the measured maximum crosstalk is −19.2 dB. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1214–1218, 2014

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Section: Resultssupporting

confidence: 91%

Multimode interference couplers based on photosensitive hybrid sol‐gel material

Abdullah

Ibrahim

Noor

et al. 2014

Micro & Optical Tech Letters

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“…Moreover, the partly formed −OH group on the SiO 2 surface in the A-LLTO/m-SiO 2 can facilitate capturing water impurities, and the existing epoxy group can contribute toward improving the ionic conductivity and the stability of the phase boundary . Accordingly, the interfacial interaction between inorganic particles and polymer matrix can be reinforced. − Thus, the employment of A-LLTO/m-SiO 2 particles fabricated through a surface modification process in the CGPE is expected to both improve the ionic conductivity of the CGPE and block the water contaminant which can possibly diffuse from the cathode side in Li–air batteries …”

Section: Results and Discussionmentioning

confidence: 99%

Composite Gel Polymer Electrolyte Based on Poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) with Modified Aluminum-Doped Lithium Lanthanum Titanate (A-LLTO) for High-Performance Lithium Rechargeable Batteries

Hằng

Ngo

Kalubarme

et al. 2016

ACS Appl. Mater. Interfaces

133

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A composite gel polymer electrolyte (CGPE) based on poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) polymer that includes Al-doped Li0.33La0.56TiO3 (A-LLTO) particles covered with a modified SiO2 (m-SiO2) layer was fabricated through a simple solution-casting method followed by activation in a liquid electrolyte. The obtained CGPE possessed high ionic conductivity, a large electrochemical stability window, and interfacial stability-all superior to that of the pure gel polymer electrolyte (GPE). In addition, under a highly polarized condition, the CGPE effectively suppressed the growth of Li dendrites due to the improved hardness of the GPE by the addition of inorganic A-LLTO/m-SiO2 particles. Accordingly, the Li-ion polymer and Li-O2 cells employing the CGPE exhibited remarkably improved cyclability compared to cells without CGPE. In particular, the CGPE as a protection layer for the Li metal electrode in a Li-O2 cell was effective in blocking the contamination of the Li electrode by oxygen gas or impurities diffused from the cathode side while suppressing the Li dendrites.

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“…Sol-gel derived materials such as SiO 2 and TiO 2 doped with metal nano-particles have been investigated for various optical devices [1]. Sol-gel processed organic-inorganic composite materials are capable of producing thick enough films by single coating without cracking.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of perfectly patterned silica-titania optical waveguide

et al. 2011

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Inorganic silica-titania thin films with thicknesses 150 nm-200 nm are deposited on high purity and polished silicon wafer and silica glass substrates by sol-gel dipping process and are patterned by capillary force lithography technique. Subsequently grating structure is embossed in green stage. The patterned gel films are subjected to stepwise heat treatment to 500 ℃ and above in pure oxygen atmosphere in order to achieve major conversion of mixed-gel to oxide optical films which are characterized by Ellipsometry, Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) to optimize the fabrication parameters and to get perfectly matched film. Removal of organics and formation of perfectly inorganic silica-titania network at optimized heat treatment in controlled environment are ensured by FTIR spectral study. The difference in refractive indices between the substrate and coated film as calculated theoretically matches exactly with the developed waveguides for operating wavelength (632.8 nm) and the measured optical properties show the planar waveguide behavior of the films.

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Sol-gel processed silica/titania/ÿ-Glycidoxypropyltrimethoxysilane composite materials for photonic applications

Cited by 17 publications

References 21 publications

Multimode interference couplers based on photosensitive hybrid sol‐gel material

Multimode interference couplers based on photosensitive hybrid sol‐gel material

Composite Gel Polymer Electrolyte Based on Poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) with Modified Aluminum-Doped Lithium Lanthanum Titanate (A-LLTO) for High-Performance Lithium Rechargeable Batteries

Experimental study of perfectly patterned silica-titania optical waveguide

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