| Popis: |
The aim of the thesis was focused into the range of factors influencing the size of silver nanoparticles usable as antimicrobials prepared by Tollens method. This method is based on reduction reaction of silver salts or silver complexes with reduction agents. Mono-, oligo-, and polysacharides are regarded as the most useful compounds for this purpose with regard to their minimal toxicity and high biocompatibility. It was concluded that various hydrodynamic conditions realized via usual stirring by laboratory stirrer, or microwaves source action, or in relatively static conditions, don't influence the condensation process in the different extent. Temperature rising to 85 řC didn't influence the size of nanoparticles also. Polymers and oligomers, as polyvinylalcohol, starches, and polydextroses has been found as the very appropriate reduction agents. The prepared samples consisted of very fine nanoparticles, the size characteristics represented by intensity and volume diameters were in the order of units of nanometers, the polydispersity indexes were of very low values. |
