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Yoshida, Makoto; Lal, Manjari; Kumar, N. Deepak; Prasad, Paras N.

doi:10.1023/a:1018645722633

Cited by 87 publications

(33 citation statements)

References 24 publications

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“…[6,43,44] However, the titania phase in the hybrid materials synthesized by sol-gel method under low temperature is commonly amorphous and the refractive index is in the range of 2.0-2.2 according to the preparation condition. [15,45] So the refractive index of TiO 2 -polymer hybrid materials is generally lower than 2.0.…”

Section: Preparation Of Tio 2 -Polythiourethane Hybrid Filmsmentioning

confidence: 99%

Research on Preparation, Structure and Properties of TiO₂/Polythiourethane Hybrid Optical Films with High Refractive Index

Lü

Cui

Guan

et al. 2003

Macro Materials & Eng

128

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Hybrid optical films of TiO2‐triethoxysilane‐capped polythiourethane (TCPTU) with high refractive indices have been prepared via an in situ sol‐gel method. The high refractive index triethoxysilane‐capped polythiourethane (TCPTU) was synthesized by polyaddition of the triethoxysilane‐modified trimercaptothioethylamine (TMTEA) and 2,2′‐dimercaptoethylsulfide (MES) with 2,4‐tolylene diisocyanate (TDI). The titania content in the hybrid films can be adjusted from 0 to 80 wt.‐% by the feed ratio of titania precursor [Ti(OBu)4] to polymer (TCPTU). Both FTIR and DSC analyses indicate that there is chemical bonding between the titania domain and the polymer chain. TGA results suggest that the titania of high content was successfully incorporated into polymer matrices and this series of hybrid films have good thermal properties. AFM measurements indicate that in the hybrid films the titania domains are of nanosize scale and the domain size averagely decreases from 60–80 nm to 5–20 nm with increasing content of titania, and the variation of surface roughness for the hybrid films has the same trend. These may be relative to the content of TCPTU and the interaction between titania and polymer (TCPTU). The refractive indices of the hybrid films at 632.8 nm increased from 1 632 to 1 879 as the titania content varied from 0 to 80 wt.‐%.AFM image of the hybrid film.magnified imageAFM image of the hybrid film.

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Section: Preparation Of Tio 2 -Polythiourethane Hybrid Filmsmentioning

confidence: 99%

Research on Preparation, Structure and Properties of TiO₂/Polythiourethane Hybrid Optical Films with High Refractive Index

Lü

Cui

Guan

et al. 2003

Macro Materials & Eng

128

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“…The coatings exhibit properties of being hydrophilic, photocatalytic and having excellent transmittance. Complexing agents such as lactic acid or oxalic acid are employed along with a surface-active agent as dispersing aids to promote dispersion of titanium dioxide [120][121].…”

Section: Incorporation Of Titanium Dioxide By In-situ Methodsmentioning

confidence: 99%

Challenges in preparation of metal-containing nanocomposites; dispersion of titanium into plastics

et al. 2010

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Abstract:Metal containing polymers are of great interest as they have proven to be the most promising materials for applications such as microelectronics, holography and magnetic recording of information. Metal containing polymers also provide an alternative to even the specialty glass materials conventionally used for optical applications. Metals such as barium, lead and lanthanum have been used to improve the optical properties such as refractive index and mechanical properties such as hardness of optical plastics. The metal-containing optical plastic materials with improved refractive index of as much as 1.60 along with the Abbe number of more than 30 have been successfully designed using these metals by the authors of this paper. To further increase the refractive index without any drop in Abbe number and to improve the hardness of the polymer matrix, titanium would be the most promising metal. Incorporation of titanium in plastic matrices to form homogeneous and optically clear compositions is a challenging task. This paper reviews the state-ofthe-art by which titanium can be dispersed in polymer matrices to form metal containing composites as optical plastics.

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“…18) In other words, this method allows the synthesis of particles with uniform small size and narrow size distribution because the reaction volume is limited to the size of the water droplets(typically a few nm). The object of this study was to investigate photoluminescence properties of the synthesized Y 3 Al 5-x Ga x O 12 :Ce 3++ (x = 0-5) nanoparticles by a reverse micelle process.…”

Section: )mentioning

confidence: 99%

Photoluminescence of Y3(Al, Ga)5O12:Ce3+ Nanoparticles by a Reverse Micelle Process

Kim¹,

Bae²

2013

Korean. J. Mater. Res.

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Trivalent cerium-ion-doped Y 3 (Al, Ga) 5 O 12 nanoparticle phosphor nanoparticles were synthesized using the reverse micelle process. The Ce doped Y 3 (Al, Ga) 5 O 12 particles were obtained from nitrate solutions dispersed in the nanosized aqueous domains of a micro emulsion consisting of cyclohexane as the oil phase and poly(oxyethylene) nonylphenyl ether (Igepal CO-520) as the non-ionic surfactant. The crystallinity, morphology, and thermal properties of the synthesized Y 3 (Al, Ga) 5 O 12 :Ce 3+ powders were characterized by thermogravimetry-differential thermal analysis (TGA-DTA), X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and transmission electron microscopy. The crystallinity, morphology, and chemical states of the ions were characterized; the photo-physical properties were studied by taking absorption, excitation, and emission spectra for various concentrations of cerium. The photo physical properties of the synthesized Y 3 (Al, Ga) 5 O 12 :Ce 3+ powders were studied by taking the excitation and emission spectra for various concentrations of cerium. The average particle size of the synthesized YAG powders was below 1 µm. 3+ is a red-emitting phosphor; it has a high efficiency for operation under near UV excitation, and may be a promising candidate for photonic applications.

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Untitled

Cited by 87 publications

References 24 publications

Research on Preparation, Structure and Properties of TiO₂/Polythiourethane Hybrid Optical Films with High Refractive Index

Research on Preparation, Structure and Properties of TiO₂/Polythiourethane Hybrid Optical Films with High Refractive Index

Challenges in preparation of metal-containing nanocomposites; dispersion of titanium into plastics

Photoluminescence of Y3(Al, Ga)5O12:Ce3+ Nanoparticles by a Reverse Micelle Process

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Untitled

Cited by 87 publications

References 24 publications

Research on Preparation, Structure and Properties of TiO2/Polythiourethane Hybrid Optical Films with High Refractive Index

Research on Preparation, Structure and Properties of TiO2/Polythiourethane Hybrid Optical Films with High Refractive Index

Challenges in preparation of metal-containing nanocomposites; dispersion of titanium into plastics

Photoluminescence of Y3(Al, Ga)5O12:Ce3+ Nanoparticles by a Reverse Micelle Process

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Research on Preparation, Structure and Properties of TiO₂/Polythiourethane Hybrid Optical Films with High Refractive Index

Research on Preparation, Structure and Properties of TiO₂/Polythiourethane Hybrid Optical Films with High Refractive Index