Browsing by Author "Abrashev M."

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    Optical and vibrational spectra analysis of CVD - Mixed oxide films: Optimization of the films electrochromic performance
    (2010-01-01) Ivanova T.; Gesheva K.A.; Abrashev M.; Sharlandjiev P.; Nazarova D.
    Mixed oxide films based on Mo and W were successfully prepared by atmospheric pressure CVD at the low substrate temperature of 200oC. High amount of oxygen was used to ensure a high degree of oxidation resulting in more stoichiometric oxide films. The structural transformations under different thermal treatments were studied by Raman spectroscopy and FTIR spectroscopy analysis. The films were characterized electrochemically by cyclic voltammetry using different electrolytes, scan rates, etc. The mixed oxide films exhibited a strong electrochromic (EC) effect. © 2010 IOP Publishing Ltd.
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    Two dimensional polymerization of graphene oxide: Bottom-up approach
    (2015-08-01) Atanasov V.; Russev S.; Lyutov L.; Zagraniarsky Y.; Dimitrova I.; Avdeev G.; Avramova I.; Vulcheva E.; Kirilov K.; Tzonev A.; Abrashev M.; Tsutsumanova G.
    We demonstrate a bottom-up synthesis of structures similar to graphene oxide via a two dimensional polymerization. Experimental evidence and discussion are conveyed as well as a general framework for this two dimensional polymerization. The proposed morphologies and lattice structures of these graphene oxides are derived from aldol condensation of alternating three nucleophilic and three electrophilic centers of benzenetriol.