The Determination of the Optimum Parameters for the Formation of Silver Nanoparticles by Aspergillus Niger BDU-A4

Abstract

In this work, the formation of silver nanoparticles was investigated by Aspergillus niger BDU-A4 at different stages/phases/culture media: a) pH: 4.82,5.79,7.42,8.88, 9.86;b) indicators of temperature (20°C, 25°C, 30°C, 37°C və 45°C) and c) indicators of different concentration of the salt of AgNO3. As a result of UV-V, absorbance spectrum is defined as the optimal conditions for the formation of maximum amount of Ag nanoparticles from AgNO3 - substrate by Aspergillus niger BDU-A4. This condition determined pH = 7.4 at 37 °C,with 10 grams of biomass within 1mm AgNO3 solution in 100 ml suspension during 6 hours incubation.