Direct photofabrication of refractive-index-modulated multimode optical waveguide using photosensitive sol-gel hybrid materials

2005 ◽  
Vol 87 (22) ◽  
pp. 221106 ◽  
Author(s):  
Dong Jun Kang ◽  
Woo-Soo Kim ◽  
Byeong-Soo Bae ◽  
Hyun Kyu Park ◽  
Bong Hyun Jung
Keyword(s):  
Refractive Index ◽  
Optical Waveguide ◽  
Hybrid Materials ◽  
Sol Gel

A facile method for fabrication of titanium-doped hybrid materials with high refractive index

RSC Advances ◽  
2014 ◽  
Vol 4 (27) ◽  
pp. 13909-13918 ◽  
Author(s):  
Xibing Zhan ◽  
Qingyu Xing ◽  
Huijuan Liu ◽  
Junying Zhang ◽  
Jue Cheng ◽  
...  
Keyword(s):  
Refractive Index ◽  
Hybrid Materials ◽  
Sol Gel ◽  
High Refractive Index ◽  
Sol Gel Process ◽  
Facile Route

This paper presents a facile route to prepare a series of high refractive index and homogeneous hybrid resins with titanium in the backbone by a non-hydrolytic sol–gel process.

Fabrication of Micro-Optical Devices by Holographic Interference of High Photosensitive Inorganic-Organic Hybrid Materials (Photo-HYBIRMER)

2004 ◽  
Vol 846 ◽  
Author(s):  
Dong Jun Kang ◽  
Jin-Ki Kim ◽  
Byeong-Soo Bae
Keyword(s):  
Refractive Index ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Optical Devices ◽  
Surface Structures ◽  
Uv Exposure ◽  
Optical Performance ◽  
Homogeneous Surface ◽  
Organic Hybrid ◽  
Direct Fabrication

ABSTRACTSol-gel derived photosensitive inorganic-organic hybrid materials (Photo-HYBRIMER) containing a large quantity of photoactive molecules exhibit the large changes in both refractive index (over 10-2) and volume (over 30%) on UV exposure. The materials could be used for direct fabrication of micro-optical devices using holographic interference. With the change of the beam number for holographic interference (1-beam, 2-beam, 3-beam and 4-beam interference), various typed micro-optical devices (Fresnel-type lens, 1D- and 2D-typed diffraction gratings) could be easily fabricated. Importantly, the fabricated micro-optical devices exhibited the very homogeneous surface structures and good optical performance.

In situ Synthesis of High Refractive Index PDMS/Metal Oxide Nanocomposites

2012 ◽  
Vol 1400 ◽  
Author(s):  
Qiaoyu Lu ◽  
Michael E. Mullins
Keyword(s):  
Refractive Index ◽  
Metal Oxide ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Heat Stability ◽  
Ceramic Materials ◽  
High Refractive Index ◽  
Oxide Content ◽  
Metal Alkoxides ◽  
Silicone Polymers

ABSTRACTOrganic-inorganic hybrids have been prepared with tailorable and enhanced properties which are unachievable using polymers or ceramics alone. By combining the flexibility of polymers with the electronic and optical properties of ceramic materials, these hybrids offer great potential for many optical, electrical and mechanical applications. Silicone polymers because of their desirable surface properties, excellent physical properties, heat stability, and high resistance to chemical and UV attack, have been widely used. Hybrid siloxane-metal oxide gels have been prepared via sol-gel techniques, by using hydroxyl-terminated polydimethylsiloxanes (PDMS) crosslinked by metallic alkoxides, M(OR)n. In this technique, the use of organic solvents permits organic and inorganic components to be combined at a molecular level with the desired composition. By varying the type and percentage of metal alkoxides during synthesis, transparent and homogeneous organic-inorganic hybrid materials with unique properties were obtained. Also a secondary metal oxide species was introduced to synthesize binary metal oxide-PDMS hybrids. Systematic experiments were carried out to study the effect of the reaction conditions and metal alkoxides-PDMS ratios on the properties of the final hybrids. These hybrids were spin coating on silicon wafers or molded into bulk films to be tested. The composition and the properties of the transparent inorganic-organic hybrids were investigated and characterized by ellipsometer and Fourier Transform Infrared (FTIR) spectroscopy. Experimental results showed that the refractive index of the hybrid materials exhibits a proportional relationship with the metal oxide content, the higher the metal oxide content the higher the refractive index. The refractive index was increased from 1.4 of PDMS to 1.7 of metal oxide-PDMS hybrid with highest prepared metal oxide loading. From the FTIR spectra, the structures of the hybrids for various metal oxide-PDMS compositions were examined.

Nickel Determination by Complexation Utilizing a Functionalized Optical Waveguide Sensor

2000 ◽  
Vol 658 ◽  
Author(s):  
Erin S. Carter ◽  
Klaus-H. Dahmen
Keyword(s):  
Refractive Index ◽  
Optical Waveguide ◽  
Light Propagation ◽  
Sol Gel ◽  
Specific Chemical ◽  
Optically Transparent ◽  
Nickel Determination ◽  
Waveguide Surface ◽  
Waveguide Sensor ◽  
Surface Changes

ABSTRACTThis research focuses on the design of chemically functionalized optical waveguide sensors. The waveguide is an optically transparent sol-gel coated onto a glass substrate chip. By having a higher refractive index than the substrate, the waveguide internally reflects a laser beam to photodetectors at both ends of the chip. The adsorption of any species onto the waveguide surface changes the light propagation, and therefore its effective refractive index, N. The change in N is dependent upon the amount of analyte present. By covalently bonding specific chemical receptors onto its surface, it can be designed to target a particular analyte. This research involves functionalizing the surface of the waveguide with ED3A in order to complex out of solution Ni2+. The change in N and the thickness of the adlayer will allow the concentration to be determined.

New high-refractive-index organic/inorganic hybrid materials from sol-gel processing

1991 ◽  
Vol 24 (11) ◽  
pp. 3449-3450 ◽  
Author(s):  
B. Wang ◽  
G. L. Wilkes ◽  
J. C. Hedrick ◽  
S. C. Liptak ◽  
J. E. McGrath
Keyword(s):  
Refractive Index ◽  
Hybrid Materials ◽  
Sol Gel ◽  
High Refractive Index ◽  
Inorganic Hybrid ◽  
Gel Processing

UV Curable Organic-Inorganic Hybrid Materials

2000 ◽  
Vol 628 ◽  
Author(s):  
Guang-Way Jang ◽  
Ren-Jye Wu ◽  
Yuung-Ching Sheen ◽  
Ya-Hui Lin ◽  
Chi-Jung Chang
Keyword(s):  
Hybrid Materials ◽  
Colloidal Silica ◽  
Sol Gel ◽  
Solution Ph ◽  
Uv Curable ◽  
Inorganic Hybrid ◽  
Degradation Temperature ◽  
Sol Gel Process ◽  
The Stability ◽  
Thermal Degradation Temperature

This work successfully prepared an UV curable organic-inorganic hybrid material consisting of organic modified colloidal silica. Applications of UV curable organic-inorganic hybrid materials include abrasion resistant coatings, photo-patternable thin films and waveguides. Colloidal silica containing reactive functional groups were also prepared by reacting organic silane and tetraethyl orthosilicate (TEOS) using sol-gel process. In addition, the efficiency of grafting organic moiety onto silica nanoparticles was investigated by applying TGA and FTIR techniques. Experimental results indicated a strong interdependence between surface modification efficiency and solution pH. Acrylate-SiO2 hybrid formation could result in a shifting of thermal degradation temperature of organic component from about 200°C to near 400°C. In addition, the stability of organic modified colloidal silica in UV curable formula and the physical properties of resulting coatings were discussed. Furthermore, the morphology of organic modified colloidal silica was investigated by performing TEM and SEM studies‥

The Influence of Polymer on Fe(II)Citrate Release from Hybrid Materials Synthesized via Sol–Gel

2020 ◽  
Vol 389 (1) ◽  
pp. 1900057
Author(s):  
Michelina Catauro ◽  
Elisabetta Tranquillo ◽  
Giovanni Dal Poggetto ◽  
Daniele Naviglio ◽  
Federico Barrino
Keyword(s):  
Hybrid Materials ◽  
Sol Gel ◽  
Citrate Release

scholarly journals Optical Isomerization and Photo-Patternable Properties of GeO2/Ormosils Organic-Inorganic Composite Films Doped with Azobenzene

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 818
Author(s):  
Xuehua Zhang ◽  
Qian Wang ◽  
Shun Liu ◽  
Wei Zhang ◽  
Fangren Hu ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Data Storage ◽  
Optical Switching ◽  
Sol Gel ◽  
Composite Films ◽  
Optical Data Storage ◽  
Optical Data ◽  
Single Chip ◽  
Coating Method ◽  
Inorganic Composite

GeO2/organically modified silane (ormosils) organic-inorganic composite films containing azobenzene were prepared by combining sol-gel technology and spin coating method. Optical waveguide properties including the refractive index and thickness of the composite films were characterized by using a prism coupling instrument. Surface morphology and photochemical properties of the composite films were investigated by atomic force microscope and Fourier transform infrared spectrometer. Results indicate that the composite films have smooth and neat surface, and excellent optical waveguide performance. Photo-isomerization properties of the composite films were studied by using a UV–Vis spectrophotometer. Optical switching performance of the composite films was also studied under the alternating exposure of 365 nm ultraviolet light and 410 nm visible light. Finally, strip waveguides and microlens arrays were built in the composite films through a UV soft imprint technique. Based on the above results, we believe that the prepared composite films are promising candidates for micro-nano optics and photonic applications, which would allow directly integrating the optical data storage and optical switching devices onto a single chip.

scholarly journals Synthesis, Structural, Morphological and Thermal Characterization of Five Different Silica-Polyethylene Glycol-Chlorogenic Acid Hybrid Materials

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1586
Author(s):  
Michelina Catauro ◽  
Pavel Šiler ◽  
Jiří Másilko ◽  
Roberta Risoluti ◽  
Stefano Vecchio Ciprioti
Keyword(s):  
Polyethylene Glycol ◽  
Chlorogenic Acid ◽  
Hybrid Materials ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Silica Matrix ◽  
Sem Images ◽  
Fixed Amount ◽  
Organic Components ◽  
Free Material

The present study investigated the structure, morphology, thermal behavior, and bacterial growth analysis of novel three-component hybrid materials synthesized by the sol-gel method. The inorganic silica matrix was weakly bonded to the network of two organic components: a well-known polymer such as polyethylene glycol (PEG, average molar mass of about 4000 g/mol), and an antioxidant constituted by chlorogenic acid (CGA). In particular, a first series was made by a 50 wt% PEG-based (CGA-free) silica hybrid along with two 50 wt% PEG-based hybrids containing 10 and 20 wt% of CGA (denoted as SP50, SP50C10 and SP50C20, respectively). A second series contained a fixed amount of CGA (20 wt%) in silica-based hybrids: one was the PEG-free material (SC20) and the other two contained 12 and 50 wt% of PEG, respectively (SP12C20 and SP50C20, respectively), being the latter already included in the first series. The X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) images of freshly prepared materials confirmed that all the materials were amorphous and homogeneous regardless of the content of PEG or CGA. The thermogravimetric (TG) analysis revealed a higher water content was adsorbed into the two component hybrids (SP50 and SC20) because of the availability of a larger number of H-bonds to be formed with water with respect to those of silica/PEG/CGA (SPC), where silica matrix was involved in these bonds with both organic components. Conversely, the PEG-rich materials (SP50C10 and SP50C20, both with 50 wt% of the polymer) retained a lower content of water. Decomposition of PEG and CGA occurred in almost the same temperature interval regardless of the content of each organic component. The antibacterial properties of the SiO2/PEG/CGA hybrid materials were studied in pellets using either Escherichia coli and Enterococcus faecalis, respectively. Excellent antibacterial activity was found against both bacteria regardless of the amount of polymer in the hybrids.

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