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	Generation of Binary COOx/SiO2 Nanoparticles from Organocompound Precursors Moravec, Pavel ; Smolík, Jiří ; Bakardjieva, Snejana ; Levdansky, V.V. In recent years cobalt and cobalt oxide nanoparticles have attracted substantial research effort because of their potential applications such as protective materials, catalysts, magnetic data recorders, batteries and gas sensors (Jang et al., 2004). To improve their functionality and biocompatibility nanoparticles are frequently coated with SiO2 (Teleki et al., 2008). In this work, we studied CoOx-SiO2 binary nanoparticles synthesis by metal organics chemical vapor deposition (MOCVD) using organo-compound precursors cobalt acetylacetonate (CoAA) and tetraethyl orthosilicate (TEOS). Fulltext: PDF Detailed record
	Influence of Size Effects on Homogeneous Nucleation Inside Nanoparticles Levdansky, V.V. ; Smolík, Jiří ; Ždímal, Vladimír ; Moravec, Pavel It is known that many physicochemical processes in aerosol systems with nanoscale particles and in nanoparticles themselves depend on the particle size. The influence of size dependence of the condensation coefficient on gas-phase nucleation was discussed in (Levdansky et al., 2010). Some problems related to nucleation in confined space, in particular the depletion effect of the ambient phase, were considered in (Kožíšek et al., 2011; Schmelzer and Abyzov, 2011). Here we study the size effects in homogeneous nucleation inside nanoparticles related to size dependence of the effective rate constant for the attachment of monomers to the critical cluster. Fulltext: PDF Detailed record
	Size-Dependent Rate Constant of Chemical Reactions in Nanoscale Particles Levdansky, V.V. ; Smolík, Jiří ; Ždímal, Vladimír ; Moravec, Pavel It is known that many processes occurring in heterogeneous systems with nanoscale objects are characterized by some specific features due to size dependence of parameters describing processes in question. This can in particular affect nanoparticle formation. Some problems related to the trapping of impurity molecules by nanoparticles were considered in (Levdansky et al., 2009). Here we study the influence of the size effect on chemical reactions inside nanoparticles. Fulltext: PDF Detailed record
	Preparation of Nanoparticles by Pyrolysis and Oxidation of Cobalt Acetylacetonate Moravec, Pavel ; Smolík, Jiří ; Levdansky, V.V. ; Bakardjieva, Snejana The aim of this work was to study cobalt and cobalt oxide nanoparticle synthesis by metal organic chemical vapor deposition (MOCVD) using cobalt acetylacetatone (CoAA) as a precursor. Detailed record
	Impurity Concentration in Aerosol Particles Growing by Vapor Condensation Levdansky, V.V. ; Smolík, Jiří ; Ždímal, Vladimír ; Moravec, Pavel The dependence of impurity concentration in growing aerosol particle on the density of the resulting flux of vapor molecules into the particle (and accordingly on the particle growth rate) is studied theoretically. It is shown that the trapping of impurity molecules by growing particle takes place in the case of inequality to zero of the sticking coefficient of impurity molecules. Detailed record
	Influence of Foreign Gas on Trapping of Vapor Molecules by Nanoscale Particles (Clusters) Levdansky, V.V. ; Smolík, Jiří ; Ždímal, Vladimír ; Moravec, Pavel Its shown that the trapping coefficient of vapor molecules by small aerosol particle (cluster) beta depends on the presence of a foreign (buffer) gas in the system. The value of beta, depending on S, can both decrease and increase with the rise of the foreign gas pressure. Detailed record
	Velikostní efekt při fázovém přechodu v aerosolových systémech s nanočásticemi (klastry) Levdansky, V.V. ; Smolík, Jiří ; Moravec, Pavel It is shown that the dependence of the condensation coefficient on the particle size influences the trapping coefficient of vapor molecules by growing particles (clusters), critical size of aerosol particles and the rate of homogeneous nucleation. Detailed record
	Velikostní efekty při koalescenci nanorozměrných aerosolových částic Levdansky, V.V. ; Smolík, Jiří ; Moravec, Pavel The size effects in coalescence of nanoparticles related to the influence of the particle size on the surface tension, the activation energy for diffusion of atoms in particles and the sticking probability of particles were considered. Detailed record
	Vliv velikostního efektu, rezonančního záření a povrchových procesů na kritický průměr aerosolových částic Levdansky, V.V. ; Smolík, Jiří ; Moravec, Pavel The influence of size effect, resonance radiation and surface processes on the critical size of aerosol particles is considered theoretically. The joint effect of an adsorbable foreign gas and a difference in the condensation and evaporation coefficients is discussed. Detailed record
	Příprava nanočástic CuOx z acetylacetonátu měďnatého Moravec, Pavel ; Smolík, Jiří ; Klementová, Mariana ; Levdansky, V.V. Copper and copper oxide particles have a wide field of applications as catalysts, sensors, semiconductors, etc. In this work, we studied CuOx nanoparticle synthesis by metal organics chemical vapor deposition (MOCVD) using copper acetylacetonate (CuAA) as a precursor. Detailed record

See also: similar author names
2	Levdansky, Valerij Vladimirovič

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