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Nucleation kinetics in deionized charged colloidal suspension
Institute of Physics, University of Rostock, Rostock, Germany.
2011 (Engelska)Ingår i: Journal of Non-Crystalline Solids, ISSN 0022-3093, E-ISSN 1873-4812, Vol. 357, s. 1044-1050Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A systematic experimental study on the nucleation, crystallization and crystal-growth of one-componentcharged colloidal particles (122 nm diluted in pure water with densities between 0.5 μm−3bnpb5 μm−3) ispresent by means of time resolved static light scattering spectroscopy revealing the heterogeneousand homogenous nature of the crystallization. The interactions between the charged colloidal particles aresufficiently strong to cause crystallization which described in terms of Debye-Hückel approximation. Crystallization starts always with the formation of compressed structurally heterogeneous precursordomains. The results show that the heterogeneous nucleation at the cell walls starts simultaneously with thehomogeneous bulk nucleation and the rate density of the heterogeneous nucleation appears slightly higher. Ithas been also found that the overall crystallization consists of at least a two-step nucleation process involvingformation of early stage nuclei or crystal precursor then followed by the main crystallization. The inductiontime, the number density of nuclei and the growth rate of crystals, is strongly dependent on particleconcentration and on whether the nucleation are homogeneous in cell center or heterogeneous on cell walls.

Ort, förlag, år, upplaga, sidor
Elsevier , 2011. Vol. 357, s. 1044-1050
Nyckelord [en]
Colloids, Crystal growth, Nucleation, Light scattering
Nationell ämneskategori
Den kondenserade materiens fysik
Identifikatorer
URN: urn:nbn:se:umu:diva-50227DOI: 10.1016/j.jnoncrysol.2010.11.042OAI: oai:DiVA.org:umu-50227DiVA, id: diva2:460695
Tillgänglig från: 2011-12-01 Skapad: 2011-12-01 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

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Salh, Roushdey

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