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Dynamics of Aerosol Number Size Distributions during an Experimental Campaign at the Bily Kriz Measuring Site
Ždímal, Vladimír ; Moravec, Pavel ; Smolík, Jiří ; Mikuška, Pavel ; Večeřa, Zbyněk ; Pokorný, Radek
This work aimed at studying the dynamics of atmospheric aerosol particle size distributions and interpreting it in connection to local concentrations of gaseous pollutants and basic meteorological parameters. Number size distributions had been monitored with high time resolution during an intense experimental campaign at a remote continental sampling site Bily Kriz. The site is located at the NE tip of the Czech Republic in the hilly region. The campaign had ben carried out at the end of June 2001. Several very interesting events were observed when formation of large amounts of new aerosol particles occured in the day time. Due to the behaviour of other measured parameters it was concluded that the so called "nucleation events" took place on a mesoscale region.
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Synthesis of Heterostructure Particles by CVD Method in a Tube Flow Reactor
Moravec, Pavel ; Smolík, Jiří ; Levdansky, V.V. ; Keskinen, H.
Powders of mixed or heterostructure fine particles are of even greater value than the single component ones. During last decade we prepared single component fine particles of silica, alumina, titania and zirconia by decomposition of organoelement precursors in an externally heated tube flow reactor. On the basis of experience with the synthesis of single component particles we prepared mixed or coated multicomponent particles Al2O3-SiO2, TiO2-SiO2 and ZrO2SiO2 by simultaneous decomposition of two precursors in one reactor.
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