6533b86ffe1ef96bd12cd15e
RESEARCH PRODUCT
Study of the growth of ZnS nanoparticles in water/AOT/n-heptane microemulsions by UV-absorption spectroscopy
M. GoffrediV. Turco LiveriPietro Calandrasubject
HeptaneMaterials scienceAnalytical chemistryNanoparticleNanoreactorEvaporation (deposition)Micellechemistry.chemical_compoundColloid and Surface ChemistryChemical engineeringchemistryPulmonary surfactantMicroemulsionSpectroscopydescription
Abstract ZnS nanoparticles were synthesized at 25°C using water-containing AOT reversed micelles as nanoreactors and characterized by UV–vis spectroscopy. The time dependence of the spectra emphasizes a slow growing process of the ZnS nanoparticles coupled with a change of their photophysical properties. Both processes are well described by power laws. The nanoparticle size can be controlled by the molar ratio R ( R =[water]/[AOT]), i.e. by the micellar size. The deposits obtained by evaporation of the volatile components of the microemulsions are found to be composed of a surfactant matrix containing ZnS nanoparticles smaller and more stable than that in the corresponding microemulsions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-12-01 | Colloids and Surfaces A: Physicochemical and Engineering Aspects |