Sol-Gel Derived Functional Coatings for Optics

Naudin, G; Ceratti, Davide Raffaele; Faustini, Marco

doi:10.1007/978-3-319-50144-4_3

Cited by 5 publications

(3 citation statements)

References 98 publications

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“…Combining TiO2 with a low refractive index material like SiO2 is another method that allows to control the optical properties of the resulting film. [3,43] However, this is outside the scope of the present study. Commercially available photocatalytic selfcleaning glass, PilkingtonActiv TM , has a 13% transmittance reduction, indicating that a loss in transmittance of 14% is perfectly acceptable for the pure TiO2-coating in view of real applications.…”

Section: Coating Characteristicsmentioning

confidence: 85%

“…This hydrophilic nature is beneficial for the use of the coating in self-cleaning applications, since a wetting surface can wash off dirt more easily. [43] Titania is known to increase the surface hydrophilicity under UV irradiation. [42,44] This was also measured by means of water contact angles of (6.9 ± 0.8)˚ for pure TiO2, (5 ± 2)˚ for 0.5 wt% Au-embedded TiO2 thin films, making the surfaces superhydrophylic.…”

Section: Coating Characteristicsmentioning

confidence: 99%

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Plasmonic gold-embedded TiO2 thin films as photocatalytic self-cleaning coatings

Peeters

Keulemans

Nuyts

et al. 2020

Applied Catalysis B: Environmental

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Transparent photocatalytic TiO2 thin films hold great potential in the development of self-cleaning glass surfaces, but suffer from a poor visible light response that hinders the application under actual sunlight. To alleviate this problem, the photocatalytic film can be modified with plasmonic nanoparticles that interact very effectively with visible light. Since the plasmonic effect is strongly concentrated in the near surroundings of the entire nanoparticle surface, an approach is presented to embed the plasmonic nanostructures in the TiO2 matrix itself, rather than deposit them loosely on the surface. This way the interaction interface is maximised and the plasmonic effect can be fully exploited.In this study, pre-fabricated gold nanoparticles are made compatible with the organic medium of a TiO2 sol-gel coating suspension, resulting in a one-pot coating suspension. After spin coating, homogeneous, smooth and highly transparent anatase thin films are obtained with a negligible loss in transparency caused upon introduction of gold nanoparticles. The thin films are characterised by ellipsometry, XRD, UV-VIS spectroscopy, AFM, SEM-EDX, TEM and water contact angle measurements.Films containing 3 wt% gold loading resulted in a stearic acid degradation efficiency increase of 16% and 40% under UVA and solar light, respectively. With this study we want to promote a promising strategy that enables effective utilisation of plasmonic enhancement that can eventually be exploited in various photocatalytic applications.

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Section: Coating Characteristicsmentioning

confidence: 85%

Section: Coating Characteristicsmentioning

confidence: 99%

Plasmonic gold-embedded TiO2 thin films as photocatalytic self-cleaning coatings

Peeters

Keulemans

Nuyts

et al. 2020

Applied Catalysis B: Environmental

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“…harvesting, processing versatility and a wide range of final properties [37][38][39] . The solutions can be deposited as thin films by simple means such as spin-coating, dip-coating or spray-coating.…”

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confidence: 99%

Photocrosslinking and photopatterning of magneto-optical nanocomposite sol–gel thin film under deep-UV irradiation

Clémentine

Berling

Jamon

et al. 2021

Sci Rep

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This paper is aimed at investigating the process of photocrosslinking under Deep-UV irradiation of nanocomposite thin films doped with cobalt ferrite magnetic nanoparticles (MNPs). This material is composed of a hybrid sol–gel matrix in which MNP can be introduced with high concentrations up to 20 vol%. Deep-UV (193 nm) is not only interesting for high-resolution patterning but we also show an efficient photopolymerization pathway even in the presence of high concentration of MNPs. In this study, we demonstrate that the photocrosslinking is based on the free radical polymerization of the methacrylate functions of the hybrid precursor. This process is initiated by Titanium-oxo clusters. The impact of the nanoparticles on the photopolymerization kinetic and photopatterning is investigated. We finally show that the photosensitive nanocomposite is suitable to obtain micropatterns with sub-micron resolution, with a simple and versatile process, which opens many opportunities for fabrication of miniaturized magneto-optical devices for photonic applications.

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Sol–Gel Deposition of Thin Films

Nagyal

Gupta

Singh

et al. 2019

Digital Encyclopedia of Applied Physics

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One of the most important applications of sol–gel processing is in the preparation of thin films. Thin‐film formation is possible due to deposition of alkoxide followed by exposure to moisture. There are various methods for thin‐film coating or deposition using sol–gel technique. However, the basic steps are almost similar, which include exhausting, excess deposit material processing, and then drying. The physical properties and microstructure of films (density, porosity etc.) are governed by the structure of the colloidal species in the dispersion. The criteria governing the deposition along with the methods of deposition and their applications are discussed in this article.

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Sol-Gel Derived Functional Coatings for Optics

Cited by 5 publications

References 98 publications

Plasmonic gold-embedded TiO2 thin films as photocatalytic self-cleaning coatings

Plasmonic gold-embedded TiO2 thin films as photocatalytic self-cleaning coatings

Photocrosslinking and photopatterning of magneto-optical nanocomposite sol–gel thin film under deep-UV irradiation

Sol–Gel Deposition of Thin Films

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