Titanium Dioxide (TiO2) (Rutile)

RIBARSKY, M

doi:10.1016/b978-012544415-6/50042-x

Cited by 7 publications

(7 citation statements)

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“…11 The refractive index of water at 633 nm is 1.332. 12 The sample that we used consisted of a water suspension of pure, uncoated rutile particles with a small ͑0.2%͒ amount of dispersing agent.…”

Section: Properties Of the Rutile Particlesmentioning

confidence: 99%

Laboratory measurements and T-matrix calculations of the scattering matrix of rutile particles in water

et al. 1999

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We present experimentally determined scattering matrix elements of birefringent rutile particles in water as a function of the scattering angle for a wavelength of 633 nm ͑in air͒. These elements are compared with the results of T-matrix calculations for prolate spheroids. For the diagonal matrix elements the results of the T-matrix calculations are in good agreement with those of the measurements. A good fit for the whole matrix, including the off-diagonal elements, is obtained when we compensate for the birefringence of the rutile particles by performing the computations for spheroids with a slightly larger length͞width ratio than measured.

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Section: Properties Of the Rutile Particlesmentioning

confidence: 99%

Laboratory measurements and T-matrix calculations of the scattering matrix of rutile particles in water

et al. 1999

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“…Titanium dioxide in nature exists in one of three crystalline forms, anatase, rutile and brookite, and in thin film form, its structure is known to be highly sensitive to deposition conditions. Rutile is the thermodynamically stable form of titania; anatase is transformed to rutile at high deposition or post-annealing temperatures (in most cases above 700 °C) [7][8][9][10][11][12][13][14]. Brookite is very rarely found in thin film form.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Reactively Sputtered Titania Coatings Deposited Using a Full Face Erosion Magnetron

et al. 2013

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Titanium dioxide (titania) is widely used as a photocatalyst for its moderate band gap, high photoactivity, recyclability, nontoxicity, low cost and its significant chemical stability. The anatase phase of titania is known to show the highest photocatalytic activity, however, the presence of this phase alone is not sufficient for sustained activity. In this study TiO 2 coatings were deposited onto glass substrates by mid-frequency pulsed magnetron sputtering from metallic targets in reactive mode using a Full Face Erosion (FFE) magnetron, which allows the magnetic field to be modulated during the deposition process. The as-deposited coatings were analysed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and micro-Raman spectroscopy. Selected coatings were then annealed at temperatures in the range of 400-700 °C and re-analysed. The photocatalytic activity of the coatings was investigated through measurements of the degradation of organic dyes, such as methyl orange, under the influence of UV and fluorescent light sources. It has been demonstrated that, after annealing, the pulsed magnetron sputtering process produced photo-active surfaces and that the activity of the coatings under exposure to fluorescent lamps was some 35%-45% of that observed under exposure to UV lamps.

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“…deviations of the lateral period throughout the woodpile, and the measured refractive index of a TiO 2 film of 2.3 is 4-15% lower than the expected index of 2.40-2.71 for rutile TiO 2 within a 1500-3000 nm range29 . This could be caused by some inherent porosity in the TiO 2 film(Fig.…”

mentioning

confidence: 64%

“…The highest refractive index, between 2.45 and 3.03 for 500-1500 nm wavelengths, is attained in the rutile phase of TiO 2 29 . The processes for AM of titania demonstrated to date suffer from high porosity, low refractive index of the constituent material, and poor…”

Section: Introductionmentioning

confidence: 96%

Additive Manufacturing of High-Refractive-Index, Nanoarchitected Titanium Dioxide for 3D Dielectric Photonic Crystals

Vyatskikh

Edwards

et al. 2020

Nano Lett.

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Additive manufacturing at small scales enables advances in micro-and nanoelectromechanical systems, micro-optics, and medical devices. Materials that lend themselves to AM at the nano-scale, especially for optical applications, are limited. State-of-the-art AM processes for high refractive index materials typically suffer from high porosity, poor repeatability, and require complex experimental procedures. We developed an AM process to fabricate complex 3D architectures out of fully dense titanium dioxide (TiO 2) with a refractive index of 2.3 and nano-sized critical dimensions. Transmission Electron Microscopy (TEM) analysis proves this material to be rutile phase of nanocrystalline TiO 2 , with an average grain size of 110 nm and <1% porosity. Proof-ofconcept woodpile architectures with 300-600 nm beam dimensions exhibit a full photonic bandgap centered at 1.8-2.9 μm, revealed by Fourier-transform Infrared Spectroscopy (FTIR) and supported by Plane Wave Expansion simulations. The developed AM process enables advances in 3D MEMS, micro-optics, and prototyping of 3D dielectric PhCs.

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Titanium Dioxide (TiO2) (Rutile)

Cited by 7 publications

References 0 publications

Laboratory measurements and T-matrix calculations of the scattering matrix of rutile particles in water

Laboratory measurements and T-matrix calculations of the scattering matrix of rutile particles in water

Photocatalytic Activity of Reactively Sputtered Titania Coatings Deposited Using a Full Face Erosion Magnetron

Additive Manufacturing of High-Refractive-Index, Nanoarchitected Titanium Dioxide for 3D Dielectric Photonic Crystals

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