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Now showing 1 - 6 of 6
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    Transparent conductive oxides for coating applications
    (Saarbrücke : Leibniz-Institut für Neue Materialien, 2009) Quilitz, Mario; Oliveira, Peter W. de; Heusing, Sabine; Veith, Michael
    Transparent, conductive oxides (TCOs) applied as coatings find multiple applications in various areas such as flat panel display setups, as electrodes in touch-screen panels, electrochromic devices, solar cells and in architectural applications for example as IR reflectors. The favored material in the class of TCOs is still ITO - Sn-doped In2O3 - due to its unique combination of high transparency and electrical conductivity. Though already very good, the potential of the ITO coatings with regard to their conductivity leaves some space for future improvements. Also ITO as a material has some serious drawbacks, such as limited availability and high costs. this work presents some stratgies to overcome these obstacles. One way to enhance the conductivities of alternative materials is to use carbon nanotubes as a dopant. This strategy was tested for ATO (Antimony-doped Tin Oxide), Titan dioxide and AZO (Aluminium-doped Zinc oxide). The results for these materials are presented. In coatings of ITO on glass or polymeric foils usually silica-based binders are used. They have the disadvantage to reduce the contact between the highly conducting grains and thus reduce overall conductivity in the composite. The matrix between the nanoparticles can be improved by several measures. Experiments with relevance in this direction are discussed. A third strategy aims at the reduction of costs in the process of ITO fabrication. Here one way to go is to use an electrochemical synthesis method. Results of the line of development are presented. Other strategies comprise the suitable processing of materials with a lower intrinsic conductivity or the search for materials with high intrinsic conductivity close to that of ITO. Exmples are presented and discussed.
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    Large area production of optical coatings and devices by the sol-gel process
    (Saarbrücke : Leibniz-Institut für Neue Materialien, 2009) Oliveira, Peter; Quilitz, Mario; Heusing, Sabine; Lin, Hechun; Veith, Michael
    [no abstract available]
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    Crystallization of Fe82Si2B16 and Fe82Si4B14 metallic glasses upon isothermal and non-isothermal annealing
    (Les Ulis : EDP Sciences, 2011) Shpak, A.P.; Il’inskii, A.G.; Marunyak, A.V.; Slukhovskyy, O.I.; Lepeeva, Yu. V.; Dekhtyar, A.; Kaban, I.; Mattern, N.; Eckert, J.
    Crystallization of Fe82Si2B16 and Fe82Si4B14 metallic glasses upon heat treatment has been studied. The amorphous ribbons have been isothermally annealed at different temperatures (673, 693, 733 and 743 K) and for various times (from 15 min to 78 hours). Phase compositions and the sequence of their appearance in dependence on the annealing temperature and time have been established.
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    ISense: A portable ultracold-atom-based gravimeter
    (Amsterdam : Elsevier, 2011) de Angelis, M.; Angonin, M.C.; Beaufils, Q.; Becker, Ch.; Bertoldi, A.; Bongs, K.; Bourdel, T.; Bouyer, P.; Boyer, V.; Dörscher, S.; Duncker, H.; Ertmer, W.; Fernholz, T.; Fromhold, T.M.; Herr, W.; Krüger, P.; Kürbis, Ch.; Mellor, C.J.; Pereira Dos Santos, F.; Peters, A.; Poli, N.; Popp, M.; Prevedelli, M.; Rasel, E.M.; Rudolph, J.; Schreck, F.; Sengstock, K.; Sorrentino, F.; Stellmer, S.; Tino, G.M.; Valenzuela, T.; Wendrich, T.J.; Wicht, A.; Windpassinger, P.; Wolf, P.
    We present iSense, a recently initiated FET project aiming to use Information and Communication Technologies (ICT) to develop a platform for portable quantum sensors based on cold atoms. A prototype of backpack-size highprecision force sensor will be built to demonstrate the concept.
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    Open Access activities of the German National Library of Science and Technology : SCOAP3-DH and Arxiv-DH
    (Hannover : Technische Informationsbibliothek (TIB), 2011) Rosemann, Uwe; Brehm, Elke
    [no abstract available]