Vliv redukčního agens na granulometrické parametry nanočástic stříbra

• Main Author: Vojtková, Katarína
• Other Authors: Dittrich, Milan
• Format: Dissertation
• Language: Czech
• Published: 2012
• Online Access: http://www.nusl.cz/ntk/nusl-310212

Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Technology Candidate: Katarína Vojtková Supervisor: Doc.RNDr. Milan Dittrich, CSc. Title of diploma thesis: Influence of reduction agent on granulometric parameters of silver nanoparticles The aim of this work is to test the influence of different technological parameters on the production of silver nanoparticles. The method used along the experiments was the Tollens reduction method. As reduction agents, there were used various monosaccharides, mainly glucose, oligosaccharides, maltose, lactose and branched polysaccharide Litesse® Ultra in different concentrations. There were used mixtures of two reducing agents as well as addition of surfactants. The concentration of silver reducing ions was increased also. The work contains comparison of the effects of different concentrations of the reducing agents used and also comparison of any changes of the conditions used for the preparation samples (e.g. freezing). Both phases of nucleation and growth were modified either by microwave radiation or ultrasound irradiation. In case of the later the samples showed very small nanoparticles with an average intensity diameter of 20 nm. The outcoming results are presented in tables and pictures. The resulting products...