Abstract

Adjusting the shape of nanoparticles is a fundamental issue in achieving the desired properties. We have proven that it is possible to synthesize the nanoparticles with the desired shapes (spherical, triangular, and colloids with a mixture of shapes) by a suitable combination of reagents. Subsequently, the size and shape of the nanoparticles affect the color of the solution. UV-VIS spectroscopy was used to evaluate the colloidal solutions, and Transmission Electron Microscopy (TEM) to indicate the shape and size of the nanoparticles. Combination of electrostatic repulsion (TCS) and steric stabilization (PVP) secure stability of nanoparticles and act also as good caping agents. AgNPs show very low antimicrobial/antibiofilm activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria and one-cell algae Chlorella kessleri (Ch. kessleri).

Keywords:Silver nanoparticles; Chemical synthesis; UV-VIS spectroscopy; TEM; Toxicity