Organo-silica–titania nanocomposite elaborated by sol–gel processing with tunable optical properties

Franc, J.; Blanc, D.; Zerroukhi, Amar; Chalamet, Yvan; Destouches, Nathalie

doi:10.1016/j.mseb.2006.01.011

Cited by 20 publications

(12 citation statements)

References 19 publications

(34 reference statements)

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“…This fact can be explained as a partial dehydration of SiO 2 due to the interaction with UDMA. Besides this, the line appears at 1170 сm -1 , which is characteristic for SiO-CH 3 stretching vibrations [18]. All the above mentioned facts can testifie to the interaction between the N-H groups in UDMA and the SiO 2 , as well as to the relation of the polymerization process to the surface of SiO 2 nanoparticles.…”

Section: Resultsmentioning

confidence: 71%

Fabrication and characterization of gold/acrylic polymer nanocomposites

Burunkova

Denisiuk

Vorzobova

et al. 2013

European Polymer Journal

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We report the method of incorporation of preformed gold nanoparticles (AuNP) into the acrylic polymer (AP) matrices and optical, TEM characterization of AuNP/AP bulk and film composite. It was shown that incorporation of dodecanethiolcovered AuNP can be enhanced in the presence of SiO 2 nanoparticles, enabling at the same time a wider range of tailoring of composite properties for optical processing.

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Section: Resultsmentioning

confidence: 71%

Fabrication and characterization of gold/acrylic polymer nanocomposites

Burunkova

Denisiuk

Vorzobova

et al. 2013

European Polymer Journal

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“…FTIR spectroscopy is a powerful technique in order to monitor the light-induced structural changes and polymerization in the inorganic network of various thin films. The literature has extensively studied the behavior of TiO 2 -SiO 2 layers through this technique [ 24 , 25 , 26 ] where inorganic and organic network modifications related to photopolymerization are mainly observed in the 800–1300 cm −1 range. We report in Figure 6 a,b the FTIR spectra obtained for sol A and B, respectively, submitted to different exposures: non-exposed films (black line), UV-cured films at 180 J/cm 2 (red line), and hard X-ray-exposed films at 50 kGy (blue line) and 100 kGy (magenta line).…”

Section: Resultsmentioning

confidence: 99%

Comparison between the UV and X-ray Photosensitivities of Hybrid TiO2-SiO2 Thin Layers

Royon¹,

Vocanson²,

Jamon³

et al. 2020

Materials

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The photo-induced effects on sol–gel-based organo TiO2-SiO2 thin layers deposited by the dip-coating technique have been investigated using two very different light sources: A light-emitting diode (LED) emitting in the UV (at 365 nm, 3.4 eV) and an X-ray tube producing 40 keV mean-energy photons. The impact of adding a photo-initiator (2,2-dimethoxy-2-phenylacetophenone-DMPA) on the sol–gel photosensitivity is characterized namely in terms of the photo-induced refractive index measured through M-line spectroscopy. Results show that both silica-titania sol–gel films with or without the photo-initiator are photosensitive to both photon sources. The induced refractive index values reveal several features where slightly higher refractive indexes are obtained for the sol–gel containing the photo-initiator. UV and X-ray-induced polymerization degrees are discussed using Fourier-transform infrared (FTIR) spectroscopy where the densification of hybrid TiO2-SiO2 layers is related to the consumption of the CH=C groups and to the decomposition of Si-OH and Si-O-CH3 bonds. X-rays are more efficient at densifying the TiO2-SiO2 inorganic and organic network with respect to the UV photons. Hard X-ray photolithography, where no cracks or damages are observed after intense exposition, can be a promising technique to design submicronic-structure patterns on TiO2-SiO2 thin layers for the building of optical sensors.

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“…Otros estudios han mostrado la formación de partículas cerámicas esféricas orgánicamente funcionalizadas a partir de mezclas de TEOS con algún organoalcoxisilano, tales como TEOS con VTES [29,52], PhTES [29,58], APTES [47][48]50], MPTES [49]; así como con mezclas de TIPO con MPTMS [41]. En tales trabajos se han logrado sintetizar tales partículas esféricas mediante la cocondensación de ambos alcóxidos utilizados, dando lugar a redes inorgánicas cuya matriz o núcleo puede ser de SiO 2 o TiO 2 , según sea el caso, y cuyas funcionalidades orgánicas covalentemente enlazadas a dicha matriz pueden ser vinilo, fenilo, aminopropilo, metacriloxipropilo, entre otros.…”

Section: I32 Síntesis De Partículas Monodispersasunclassified

Synthesis and characterisation of organic-inorganic hybrid polymers: Polystyrene-SiO2 & Polystyrene-TiO2

Carrillo¹

2018

Preprint

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This work focuses on the synthesis and characterisation of a new class of materials so-called organic-inorganic hybrid polymers, whose main characteristics are the synergy and bonding between an organic phase with an inorganic phase. This thesis is a research effort towards getting new and better materials for diverse and specialised applications.The synthesis of materials was carried out in two stages: in the first one hybrid particles of SiO2 and TiO2 were obtained via sol-gel process, both of them functionalised with vinyl groups, and nominal diameters of 200 nm and 220 nm, respectively. In the second stage hybrid polymers of the type polystryrene-SiO2 (PS-SiO2) and polystyrene-TiO2 (PS-TiO2) were obtained via free radical polymerisation, and employing different concentrations of the functionalised hybrid particles obtained in the first stage. These materials formed translucent and semiflexible films.The presence of the inorganic phase inside the organic phase for both systems, PS-SiO2 and PS-TiO2, promoted a decrease on the Tg inversely proportional to the concentration increase of PS-SiO2 and PS-TiO2, respectively, which suggests that the particles confer a plasticiser effect over the polymer matrix.For both systems, PS-SiO2 and PS-TiO2, apart from the Tg decrease, there were differences on the elastic modulus measured. These results suggest that these differences might be due to the difference in particle size and chemical species. Likewise, the thermal stability of both PS-SiO2 and PS-TiO2 increased significantly and in the same order, relative to pristine polystyrene.

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Organo-silica–titania nanocomposite elaborated by sol–gel processing with tunable optical properties

Cited by 20 publications

References 19 publications

Fabrication and characterization of gold/acrylic polymer nanocomposites

Fabrication and characterization of gold/acrylic polymer nanocomposites

Comparison between the UV and X-ray Photosensitivities of Hybrid TiO2-SiO2 Thin Layers

Synthesis and characterisation of organic-inorganic hybrid polymers: Polystyrene-SiO2 & Polystyrene-TiO2

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Organo-silica–titania nanocomposite elaborated by sol–gel processing with tunable optical properties

Cited by 20 publications

References 19 publications

Fabrication and characterization of gold/acrylic polymer nanocomposites

Fabrication and characterization of gold/acrylic polymer nanocomposites

Comparison between the UV and X-ray Photosensitivities of Hybrid TiO2-SiO2 Thin Layers

Synthesis and characterisation of organic-inorganic hybrid polymers: Polystyrene-SiO2 &amp; Polystyrene-TiO2

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Product

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Synthesis and characterisation of organic-inorganic hybrid polymers: Polystyrene-SiO2 & Polystyrene-TiO2