Latest Academic Works
Synthesis and functionalisation of one-dimensional titanate-based nanostructures
One-dimensional hydrothermally synthesized nanostructures such as nanotubes and nanobelts composed of layered titanates from A2TinO2n+1 family have attracted great interest due to their high specific surface area, ion-exchange ability and semiconducting properties, which make them promising candidates for potential applications in the field of catalysis, gas sensors, dye-sensitized solar cells, …
The synthesis and characterization of glass–ceramics based on ternary system MgO-B2O3-SiO2
The past fifteen years has seen the rapid development of various wireless communication devices, which operate at microwave or milimeterwave frequencies (mobile phones, wireless local-area networks (LAN), Bluetooth, etc.). At the same time, this progress has stimulated the development of new materials and process technologies, which enable the size reduction …
Synthesis and Characterization of Bi12SiO20 Thin Films Prepared by Sol-gel Method
The sillenites Bi12MO20 (M = Si, Ge, Ti, Pb, Mn, B1/2P1/2) have been recognised as promising bulk materials for electronic applications because their dielectric properties (5.5 GHz: ε = 37.4 - 41, τf = -19 – (-84) ppm/K, Q x f = 800 - 8100 and Tsin = 680 - …
Na0.5Bi0.5TiO3-based materials with mechanical-stress-dependent dielectric properties
The stress dependence of the electrical permittivity offers a convenient way of measuring pressure. This effect is suitable for static and quasi-static stress applications, where the conventional method based on the piezoelectric effect becomes inadequate. Although the principle of applying this effect for pressure sensing has been known for almost …
Polyelectrolyte multilayer template assisted in-situ synthesis of inorganic nanostructures
Thin film nanocomposites consisting of inorganic matter embedded within a soft polymeric matrix on the nanometer scale have attracted much interest lately due to their unique properties with potential application in optoelectronics and photonics. Polyelectrolyte multilayers formed by the layer-by-layer electrostatic assembly of oppositively charged polyions can be utilized as …
The synthesis and characterization of BaO-rich phases within the BaO-Nb2O5 and BaO-WO3-Nb2O5 systems
This PhD thesis presents experimental results from the synthesis, crystal structure and microwave dielectric characterization of BaO-rich phases within the BaO-Nb2O5 and BaONb2O5- WO3 system. I was primarily interested in two compounds with unknown crystal structure, i.e., the binary Ba4Nb2O9 and the ternary Ba6Nb2WO14, which lie on a common virtual …