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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F12%3A10128555%21RIV13-GA0-11320___
rdf:type
n3:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1016/j.jcis.2012.03.073
dcterms: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.
dcterms: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
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
skos:notation
RIV/00216208:11320/12:10128555!RIV13-GA0-11320___
n3:predkladatel
n4:orjk%3A11320
n5:aktivita
n17:Z n17:P
n5:aktivity
P(ED0040/01/01), P(GAP107/11/1918), Z(MSM0021620835)
n5:cisloPeriodika
JUL 1 2012
n5:dodaniDat
n10:2013
n5:domaciTvurceVysledku
n16:9938486 n16:3936031
n5:druhVysledku
n20:J
n5:duvernostUdaju
n15:S
n5:entitaPredkladatele
n18:predkladatel
n5:idSjednocenehoVysledku
160939
n5:idVysledku
RIV/00216208:11320/12:10128555
n5:jazykVysledku
n19:eng
n5:klicovaSlova
Molecular modeling; Cetyltrimethylammonium bromide; ZnS nanoparticles
n5:klicoveSlovo
n13:ZnS%20nanoparticles n13:Molecular%20modeling n13:Cetyltrimethylammonium%20bromide
n5:kodStatuVydavatele
US - Spojené státy americké
n5:kontrolniKodProRIV
[BFE2B7DC94C9]
n5:nazevZdroje
Journal of Colloid and Interface Science
n5:obor
n21:CI
n5:pocetDomacichTvurcuVysledku
2
n5:pocetTvurcuVysledku
5
n5:projekt
n7:GAP107%2F11%2F1918 n7:ED0040%2F01%2F01
n5:rokUplatneniVysledku
n10:2012
n5:svazekPeriodika
377
n5:tvurceVysledku
Praus, Petr Kovář, Petr Horinkova, Petra Dvorsky, Richard Pospíšil, Miroslav
n5:wos
000304432400009
n5:zamer
n12:MSM0021620835
s:issn
0021-9797
s:numberOfPages
6
n11:doi
10.1016/j.jcis.2012.03.073
n22:organizacniJednotka
11320