Bacterial growth inhibition of e. coli by zno tetrapods

Abstract

ZnO tetrapods were synthesized by thermal oxidation technique under atmospheric pressure, to forming as microstructural scale for increasing a high surface to volume ratio which effects to higher reaction rate. ZnO was mixed in nutrient broth (NB) by varies ZnO concentration from 1,000 ppm to 500,000 ppm. E. coli was growth in mixed NB under temperature of 37 oC for 24 h. The bacterial growth was investigated by a measurement of optical density (OD) using UV-Visible spectrophotometer at wavelength of 600 nm. It was showed that the OD decreasing as a linear function of ZnO concentration at the concentration in range of 1,000 ppm to 50,000 ppm. Moreover, it was rapidly decreased at the concentration are 100,000 ppm and 500,000 ppm. The result shows the bacterial growth has been decreased. Therefore, we concluded that ZnO tetrapods have an inhibition potential for E. coli.