Vanadium(IV) Oxide
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High Quality Content by WIKIPEDIA articles! Tungsten-doped vanadium dioxide (W:VO2) with 1.9% tungsten content has been investigated for use as a "spectrally-selective" window coating to block infrared transmission and reduce the loss of building interior heat through windows. This material behaves like a semiconductor at temperatures below 29 °C, allowing more transmission, and like a conductor at higher temperatures, providing much greater reflectivity.Varying the amount of tungsten allows regulating the phase transition temperature. However, the coating has a slight yellow-green…mehr

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High Quality Content by WIKIPEDIA articles! Tungsten-doped vanadium dioxide (W:VO2) with 1.9% tungsten content has been investigated for use as a "spectrally-selective" window coating to block infrared transmission and reduce the loss of building interior heat through windows. This material behaves like a semiconductor at temperatures below 29 °C, allowing more transmission, and like a conductor at higher temperatures, providing much greater reflectivity.Varying the amount of tungsten allows regulating the phase transition temperature. However, the coating has a slight yellow-green color.Nanostars of Vanadium(IV) oxide Vanadium dioxide can act as an extremely fast optical shutter. The thermochromic phase transition between the transparent semiconductive and reflective conductive phase, occurring at 68 °C, can happen in times as short as a one tenth of a trillionth of a second.Vanadium dioxide, especially in its nanocrystalline form, may find use in glazing applications, extremelyfast optical shutters, optical modulators, infrared modulators for missile guidance systems, cameras, data storage, and other applications.