Incorporation of Eu–Tb codoped nanophosphors in silica-based coatings assisted by atmospheric pressure plasma jet technology

Beggio, Alice; Fantin, Marina; Scopece, Paolo; Surpi, Alessandro; Patelli, Alessandro; Benedetti, Alvise; Cristofori, Davide; Enrichi, Francesco

doi:10.1016/j.tsf.2015.02.014

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…Interestingly, the literature offers examples in which the PECVD is included in multistep deposition procedures leading to layered NC coatings [107][108][109][110][111][112][113]. In their simplest form, these coatings consist of two layers, i.e., a layer of inorganic NPs overcoated with a plasma-deposited thin film that enables the NPs immobilization on the substrate [113].…”

Section: Plasma-enhanced Chemical Vapor Deposition Of Nc Coatingsmentioning

confidence: 99%

Low-Temperature Atmospheric Pressure Plasma Processes for the Deposition of Nanocomposite Coatings

Uricchio

Fanelli

2021

Processes

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Low-temperature atmospheric pressure (AP) plasma technologies have recently proven to offer a range of interesting opportunities for the preparation of a variety of nanocomposite (NC) coatings with different chemical compositions, structures, and morphologies. Since the late 2000s, numerous strategies have been implemented for the deposition of this intriguing class of coatings by using both direct and remote AP plasma sources. Interestingly, considerable progress has been made in the development of aerosol-assisted deposition processes in which the use of either precursor solutions or nanoparticle dispersions in aerosol form allows greatly widening the range of constituents that can be combined in the plasma-deposited NC films. This review summarizes the research published on this topic so far and, specifically, aims to present a concise survey of the developed plasma processes, with particular focus on their optimization as well as on the structural and functional properties of the NC coatings to which they provide access. Current challenges and opportunities are also briefly discussed to give an outlook on possible future research directions.

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Section: Plasma-enhanced Chemical Vapor Deposition Of Nc Coatingsmentioning

confidence: 99%

Low-Temperature Atmospheric Pressure Plasma Processes for the Deposition of Nanocomposite Coatings

Uricchio

Fanelli

2021

Processes

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“…Thickness and homogeneity of the nanophosphors layer must be consequently taken under control. For these purposes, silica could behave as the ideal protective layer, because it has been shown to build up a transparent compact coating with a good anchorage to the substrate [25].…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Deposition of silica protected luminescent layers of Eu:GdVO4 nanoparticles assisted by atmospheric pressure plasma jet

et al. 2016

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Eu:GdVO 4 nanophosphors with an average size of 60 nm, synthesized by a facile solvothermal method, were deposited on monocrystalline silicon wafers by a spray-coating technique with artworks anti-counterfeiting applications in mind. Atmospheric pressure plasma jet (APPJ) was used to deposit a silica-based layer on top of the nanometric luminescent layer, in order to improve its adhesion to the substrate and to protect it from the environment. The nanophosphors were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Coating composition was investigated by Fourier transform infrared spectroscopy (FT-IR) and its morphology was characterized by scanning electron microscopy (FEG-SEM). The film thickness was evaluated by means of ellipsometry and adhesion was estimated by a peeling test. Luminescent properties of the nanophosphors deposited and fixed on silicon wafers were also measured. The whole layer resulted well-adhered to the silicon substrate, transparent and undetectable in the presence of visible light, but easily activated by UV light source.

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Luminescent Eu-doped GdVO4 nanocrystals as optical markers for anti-counterfeiting purposes

et al. 2016

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Luminescent Eu:GdVO4 nanoparticles, with an average size of 60 nm, were deposited first on monocrystalline silicon wafers, then on four different natural stone materials, by a spray-coating technique and a silica layer was subsequently deposited by atmospheric pressure plasma jet to protect the luminescent layer and improve its adhesion to the substrate. The luminescent films were characterized by photoluminescence excitation and emission, while the surface morphology was examined by FEG-SEM microscopy and spectroscopic ellipsometry to determine the coating thickness. The optical appearance of the coatings was also evaluated by colorimetric measurements and the efficacy of the fixing action of the silica layer was estimated by PL measurements performed before and after a Scotch™ tape peeling test. The proposed methodology, easily applied on the surface of stone supports, has led to the realization of a luminescent film displaying good mechanical properties, transparent and undetectable in the presence of visible light, but easily activated by UV light source, indicating that the Eu:GdVO4 nanophosphors could be used as luminescent nanotags for a reliable anti-counterfeiting technology

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Incorporation of Eu–Tb codoped nanophosphors in silica-based coatings assisted by atmospheric pressure plasma jet technology

Cited by 3 publications

References 37 publications

Low-Temperature Atmospheric Pressure Plasma Processes for the Deposition of Nanocomposite Coatings

Low-Temperature Atmospheric Pressure Plasma Processes for the Deposition of Nanocomposite Coatings

Deposition of silica protected luminescent layers of Eu:GdVO4 nanoparticles assisted by atmospheric pressure plasma jet

Luminescent Eu-doped GdVO4 nanocrystals as optical markers for anti-counterfeiting purposes

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