Bojana Laban

Faculty of Natural Science and Mathematics, University of Priština, Kosovska Mitrovica, Serbia

Articles

Open Access Original Scientific Paper

PREPARATION OF SILVER AND COPPER NANOPARTICLES IN PRESENCE OF ASCORBIC ACID AND INVESTIGATION OF THEIR ANTIBACTERIAL ACTIVITY

by Bojana Laban, Milena Košanin, Goran Isić, Uroš Ralević, Mirjana Marković, Anja Jokić, Vesna Vasić

In this study, we present a synthesis of silver and copper nanoparticles (NPs) using ascorbic acid as stabilizing and sodium borohydride as reducing agents, respectively. Four colloidal dispersions were obtained, two of them additionally stabilized by gelatin. They were characterized by UV-Vis, AFM, DLS and zeta potential measurements. The size of both silver and copper NPs, determined by AFM measurements, was 10 nm before, and 15 nm after stabilization with gelatin. Antibacterial activity of synthesized NPs was tested using series of gram positive and gram negative bacteria. It was found that Ag and Cu NPs showed antibacterial activity in all cases.

View Full-Text DOI 10.5937/univtho7-14762 Published: 13 Oct 2017

Open Access

CHARACTERIZATION OF NEW SYNTHESIZED Fe2O3 NANOPARTICLES AND THEIR APPLICATION AS DETECTION SIGNAL AMPLIFIERS IN HERBICIDE BENTAZONE ELECTROANALYTICAL DETERMINATION

by Anja Jokić, Branka Petković, Sonja Jevtić, Vesna Vasić, Bojana Laban

The iron oxide nanoparticles (Fe2O3 NPs) were synthesized from two different iron salts by solid-state synthesis method. The synthesized powder of Fe2O3 NPs is soluble in water, and the colloidal dispersion was characterized by TEM, FTIR, UV-Vis spectroscopy and zeta potential measurements. Obtained NPs are spherical in shape with narrow particle size distribution and an average diameter of 3 nm. Further, the possible application of Fe2O3 NPs was proposed, due to significant electroanalytical signal amplification in the determination of herbicide bentazone in natural river water.

View Full-Text DOI 10.5937/univtho9-19359