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 nanoparticles dispersed in water soluble polymer matrices.
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