Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27340
Title: Preparation of alumina nanoparticle suspensions with narrow particle size distribution
Authors: Kalinina, E. G.
Efimov, A. A.
Safronov, A. P.
Ivanov, V. V.
Beketov, I. V.
Сафронов, А. П.
Issue Date: 2013
Citation: Preparation of alumina nanoparticle suspensions with narrow particle size distribution / E. G. Kalinina, A. A. Efimov, A. P. Safronov [et al.] // Nanotechnologies in Russia. — 2013. — Vol. 8. — № 7-8. — P. 511-517.
Abstract: Dynamic light scattering (DLS) was applied to the study of the process of the preparing deaggregated water suspensions of alumina nanopowders with specific surface areas of 20-140 m2/g. Nanopowders were prepared by the electric explosion of wire and laser evaporation and, according to electron microscopy (TEM), consisted of nonagglomerated spherical nanoparticles with lognormal size distribution. According to DLS, nonsedimenting water suspensions of alumina nanoparticles, stabilized by sodium citrate at a 5 mM concentration, contain substantial fraction of aggregates. The dynamics of the change in the mean average size of aggregates under exhaustive ultrasound treatment of suspensions with 10 g/l concentration for 1.5-4 h by two types of ultrasonic processors was studied. It was shown that the mean average size of aggregates exponentially diminishes by 1.5-2 times and the fraction of individual particles in suspension enlarges from 45 to 85%. Sequentially centrifuging the suspension at 18000 g separates the remaining aggregates and results in suspensions of individual alumina nanoparticles. Particle size distributions in these suspensions obtained by TEM and DLS are the same within experimental error. © 2013 Pleiades Publishing, Ltd.
Keywords: ALUMINA NANOPARTICLE
ELECTRON MICROSCOPIES (TEM)
EXPERIMENTAL ERRORS
INDIVIDUAL PARTICLES
LOG-NORMAL SIZE DISTRIBUTIONS
SPHERICAL NANOPARTICLES
ULTRASONIC PROCESSOR
ULTRASOUND TREATMENTS
AGGLOMERATION
AGGREGATES
ALUMINA
DYNAMIC LIGHT SCATTERING
NANOPARTICLES
NANOSTRUCTURED MATERIALS
PARTICLE SIZE ANALYSIS
SIZE DISTRIBUTION
SUSPENSIONS (FLUIDS)
URI: http://hdl.handle.net/10995/27340
SCOPUS ID: 84881483159
PURE ID: 898566
ISSN: 1995-0780
DOI: 10.1134/S1995078013040058
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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