About: Precipitation, stabilization and molecular modeling of ZnS nanoparticles in the presence of cetyltrimethylammonium bromide

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.jcis.2012.03.073
Description	ZnS nanoparticles were precipitated in aqueous dispersions of cationic surfactant cetyltrimethylammonium bromide (CTAB). The sphere radii of ZnS nanoparticles calculated by using band-gap energies steeply decreased from 4.5 nm to 2.2 nm within CTAB concentrations of 0.4-1.5 mmol L-1. Above the concentration of 1.5 mmol L-1, the radii were stabilized at R = 2.0 nm and increased up to R = 2.5 nm after 24 h. The hydrodynamic diameters of ZnS-CTAB structures observed by the dynamic light scattering (DLS) method ranged from 130 nm to 23 nm depending on CTAB concentrations of 0.5-1.5 mmol L-1. The complex structures were observed by scanning electron microscopy (SEM). At the higher CTAB concentrations, ZnS nanoparticles were surrounded by CTA(+) bilayers forming positively charged micelles with the diameter of 10 nm. The positive zeta-potentials of the micelles and their agglomerates were from 16 mV to 33 mV. Wurtzite and sphalerite nanoparticles with R = 2.0 nm and 2.5 nm covered by CTA(+). were modeled with and without water. Calculated sublimation energies confirmed that a bilayer arrangement of CFA(+) on the ZnS nanoparticles was preferred to a monolayer. ZnS nanoparticles were precipitated in aqueous dispersions of cationic surfactant cetyltrimethylammonium bromide (CTAB). The sphere radii of ZnS nanoparticles calculated by using band-gap energies steeply decreased from 4.5 nm to 2.2 nm within CTAB concentrations of 0.4-1.5 mmol L-1. Above the concentration of 1.5 mmol L-1, the radii were stabilized at R = 2.0 nm and increased up to R = 2.5 nm after 24 h. The hydrodynamic diameters of ZnS-CTAB structures observed by the dynamic light scattering (DLS) method ranged from 130 nm to 23 nm depending on CTAB concentrations of 0.5-1.5 mmol L-1. The complex structures were observed by scanning electron microscopy (SEM). At the higher CTAB concentrations, ZnS nanoparticles were surrounded by CTA(+) bilayers forming positively charged micelles with the diameter of 10 nm. The positive zeta-potentials of the micelles and their agglomerates were from 16 mV to 33 mV. Wurtzite and sphalerite nanoparticles with R = 2.0 nm and 2.5 nm covered by CTA(+). were modeled with and without water. Calculated sublimation energies confirmed that a bilayer arrangement of CFA(+) on the ZnS nanoparticles was preferred to a monolayer. (en)
Title	Precipitation, stabilization and molecular modeling of ZnS nanoparticles in the presence of cetyltrimethylammonium bromide Precipitation, stabilization and molecular modeling of ZnS nanoparticles in the presence of cetyltrimethylammonium bromide (en)
skos:prefLabel	Precipitation, stabilization and molecular modeling of ZnS nanoparticles in the presence of cetyltrimethylammonium bromide Precipitation, stabilization and molecular modeling of ZnS nanoparticles in the presence of cetyltrimethylammonium bromide (en)
skos:notation	RIV/00216208:11320/12:10128555!RIV13-GA0-11320___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(ED0040/01/01), P(GAP107/11/1918), Z(MSM0021620835)
http://linked.open...iv/cisloPeriodika	JUL 1 2012
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Pospíšil, Miroslav Kovář, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	160939
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/12:10128555
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Molecular modeling; Cetyltrimethylammonium bromide; ZnS nanoparticles (en)
http://linked.open.../riv/klicoveSlovo	Cetyltrimethylammonium bromide Molecular modeling ZnS nanoparticles
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[BFE2B7DC94C9]
http://linked.open...i/riv/nazevZdroje	Journal of Colloid and Interface Science
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Regional materials science and technology centre Research of the zinc and cadmium sulphide nanoparticles deposited on phyllosilicates for the photocatalytic reduction of carbon dioxide
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	377
http://linked.open...iv/tvurceVysledku	Kovář, Petr Pospíšil, Miroslav Praus, Petr Dvorsky, Richard Horinkova, Petra
http://linked.open...ain/vavai/riv/wos	000304432400009
http://linked.open...n/vavai/riv/zamer	Fyzika molekulárních, makromolekulárních a biologických systémů
issn	0021-9797
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jcis.2012.03.073
http://localhost/t...ganizacniJednotka	11320

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