A new method for titania thin film production

Şenay, Volkan; Özen, Soner; Pat, Şuat; Geçici, Birol; Korkmaz, Şadan

doi:10.1177/0892705715614060

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…24 However, despite transparency another important optical feature of materials is considered their relatively high refractive index. 26 Since the refractive index of polypropylene (1.47) and nano-silica (1.45) are matching very well the loss of transparency can be avoided at the low concentration of the filler. The refractive index of polymer nanocomposite was calculated depending on silica concentration.…”

Section: Resultsmentioning

confidence: 99%

Structure and optic properties of the nanocomposites based on polypropylene and amorphous silica nanoparticles

Ramazanov

Shirinova

Nuriyeva

et al. 2021

Journal of Thermoplastic Composite Materials

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The structure and optic properties of the transparent PP+SiO2 nanocomposites with a relatively high refractive index and enhanced luminescence properties were investigated. X-ray analysis, Fourier-transform infrared (FTIR), Visible-ultraviolet, and photoluminescence spectroscopic methods were used for investigation. The XRD analysis indicated that the fraction of the amorphous phase of the polycrystalline polymer decreases with the introduction of SiO2 nanoparticles. Even though SiO2 nanoparticle is amorphous itself, they play the role of the crystallinity centers in the polymer matrix, and the degree of crystallinity increases in polymer nanocomposites. According to UV-vis spectroscopic analysis that, with the increasing of the concentration of SiO2 nanoparticles distributed in the polymer matrix, the absorption intensity of the samples also increases. It was explained by the hyperchromic effect which is related to raising the optical density of the polymer by introducing the filler particles (SiO2). It was calculated bandgap energy and refractive index on the base of the UV spectra of samples. It has been found that at low concentrations of amorphous silica nanoparticles, the polymer nanocomposite retains its transparency despite having a relatively high refractive index (1.96). Furthermore, the photoluminescence (PL) spectrum of nanocomposites was investigated depending on filler concentration. It was clear that the intensity of the PL spectrums increases with the increase of the filler concentration that is explained by the raising of the luminescence centers in the nanocomposite material. These luminescence centers are oxygen-deficit centers in the spatial structure of the amorphous silica nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Structure and optic properties of the nanocomposites based on polypropylene and amorphous silica nanoparticles

Ramazanov

Shirinova

Nuriyeva

et al. 2021

Journal of Thermoplastic Composite Materials

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“…The authors of ref. [198] produced the TiO 2 films by TVA on Indium-tin-oxide (ITO) and fluorine-tin-oxide (FTO) coated glass substrates. The deposited films were identified to be in anatase and rutile crystalline phases.…”

Section: Deposition Of the Titanium Dioxidementioning

confidence: 99%

Thermionic Vacuum Arc—A Versatile Technology for Thin Film Deposition and Its Applications

et al. 2020

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This review summarizes the more-than-25-years of development of the so-called thermionic vacuum arc (TVA). TVA is an anodic arc discharge in vapors of the material to be deposited; the energy for its melting is delivered by means of a focused electron beam. The resulting material ions fall at the substrate where they form a well-adhesive layer; the ion energy is controllable. The deposited layers are, as a rule, free from droplets typical for cathodic arc deposition systems and the thermal stress of the substrates being coated is low. TVA is especially suitable for processing refractory metals, e.g., carbon or tungsten, however, in the course of time, various useful applications of this system originated. They include layers for fusion application, hard coatings, low-friction coatings, biomedical-applicable films, materials for optoelectronics, and for solid-state batteries. Apart from the diagnostic of the film properties, also the diagnostic of the TVA discharge itself as well as of the by TVA generated plasma was performed. The research and application of the TVA proceeds in broad international collaboration. At present, the TVA technology has found its firm place among the different procedures for thin film deposition.

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