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  • 1
    Electronic Resource
    Electronic Resource
    Sims Characterization of Noble Metal-Based Thin Film Electrodes (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 235-238 (Oct. 1996), p. 625-630 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/02/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.235-238.625.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Thermochromic Coatings for Intelligent Architectural Glazing (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Journal of nano research Vol. 2 (Aug. 2008), p. 1-20 
    Details
    ISSN: 1661-9897
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Thermochromic glazing is a type of intelligent glazing; one where the properties of the glazing change according to some external stimulus. More particularly a thermochromic window is a device that changes its transmission and reflectance properties at a critical temperature (Tc). Atthis specific temperature the material undergoes a semi-conductor to metal transition. At temperatures lower than Tc the window lets all of the solar energy that hits it through. At emperatures above Tc the window reflects the infra-red portion of solar energy. In such a way thermochromic windows may help reduce air conditioning and heating costs leading to more energy efficient buildings. This review details the nature of the semi-conductor to metal transition and indicates how substitutional doping within a crystal lattice can be used to manipulate and fine tune the critical temperature. Also detailed is the underlying science and methodologies so far employed in the production of thermochromic thin films
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/43/transtech_doi~10.4028%252Fwww.scientific.net%252FJNanoR.2.1.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of the Optical Constants of VO〈sub〉2〈/sub〉and Nb-Doped VO〈sub〉2〈/sub〉 Thin Films (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 587-588 (June 2008), p. 640-644 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A numerical model was developed which enables the calculation of the optical constants(refractive index, n and extinction coefficient, k) of thermochromic coatings based in undoped anddoped vanadium dioxide thin coatings deposited on glass for use as an intelligent window - awindow that can change the optical properties in response to the temperature. From experimentalresults it can be seen that the vanadium dioxide coating prepared by Atmospheric Chemical VapourDeposition shows a switching efficiency of about 30% at 2500 nm. In the visible range thetransmittance and the reflectance does not change with the temperature both for the undoped and Nbdoped VO2. For the Nb doped vanadium dioxide coating the switching efficiency is about 20% at2500 nm. From the numerical simulations a n=2.89 and k=1.33 above Tc and n=2.39 and k=0.52below Tc (at wavelength of 2500 nm) were determined for the undoped vanadium dioxide coating.The Nb doped vanadium dioxide coating calculations results on n= 2.45 and k=1.56 above Tc andn=1.92 and k=0.88 below Tc
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.640.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Temperature dependence of intrinsic infrared absorption in natural and chemical-vapor deposited diamond (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 92 (2002), S. 756-763 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Empirical rules are derived that describe the temperature dependence of the infrared absorption spectra of pure diamond for photons of energy hν=500–4000 cm−1. We show that with increasing temperature in the range 14〈T〈850 K, all the features in the infrared spectrum shift to lower frequency at very similar fractional rates. The rate for all the features is, to ±13%, Δν/ν=cn(Ee) where c=−0.027 and n(Ee) is the Bose–Einstein population factor with Ee=860 cm−1. The intensities of the optical absorption involving the creation of two phonons of energies E1 and E2 are expected to increase with T in proportion to [1+n(E1)][1+n(E2)]. This expression, combined with the fractional shift rule for the energies of each mode, allows high temperature two-phonon spectra to be simulated accurately from a low temperature spectrum. The temperature dependence of the three-phonon band between 2665 and 3900 cm−1 is precisely fitted without adjustable parameters by using the shift rule in conjunction with a modified density of three-phonon states. Absorption at 10.6 μm is shown to involve the simultaneous destruction and creation of phonons. Its strong temperature dependence in the range 300〈T〈800 K is accurately described, without any adjustable parameters, in terms of three main components: the destruction of one phonon of 335 cm−1 and the creation of a second of 1275 cm−1; the shift to lower energy of the phonons; and a three-phonon process involving the destruction of one and the creation of two phonons. The analysis demonstrates why diamond has to be effectively cooled when used for the windows of a high-power CO2 laser. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1483380
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