Abstract
ABSTRACT We present the results on the structure and the optical properties of noble metal (Ag, Au) and oxide (ZnO) nanoparticles synthesized by various methods in different polysaccharide matrices such as chitosan, glycogen, alginate and starch. The structure of the obtained nanoparticles was studied in detail with microscopic techniques (TEM, SEM), while the XPS spectroscopy was used to investigate the effects at the nanoparticle-biomolecule interfaces. The antimicrobial activity of the nanocomposite films with Ag nanoparticles was tested against the Staphylococcus aureus, Escherichia coli and Candida albicans pathogens. In addition, we will present the results on the structure and optical properties of the tryptophan amino acid functionalized silver nanopartic les dispersed in water soluble polymer matrices. Keywords: metal nanoparticles, polysaccharides, biopolymer, nanocomposites INTRODUCTION The considerable scientific interest that nanocomposites comprised of metal and/or semiconductor nanoparticles dispersed in polymer matrices received in the last decades is a result of a number of interesting fundam ental properties of these materials as well as a wide range of their possible applications
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