P. Calandra et al., Study of the growth of ZnS nanoparticles in water/AOT/n-heptane microemulsions by UV-absorption spectroscopy, COLL SURF A, 160(1), 1999, pp. 9-13
Citations number
14
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ZnS nanoparticles were synthesized at 25 degrees C using water-containing A
OT reversed micelles as nanoreactors and characterized by UV-vis spectrosco
py. The time dependence of the spectra emphasizes a slow rowing process of
the ZnS nanoparticles coupled with a change of their photophysical properti
es. 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 mic
ellar size. The deposits obtained by evaporation of the volatile components
of the microemulsions are found to be composed of a surfactant matrix cont
aining ZnS nanoparticles smaller and more stable than that in the correspon
ding microemulsions. (C) 1999 Elsevier Science B.V. All rights reserved.