Kinetics of Biosynthesis of Silver Nanoparticles Using Fusarium Oxysporum

Current Trends in Technology and Sciences (CTTS) The emergence of nanobiotechnology has exposed the greener methods of preparation and application. Many theoretical and experimental works have been conducted in the biosynthesis of various nanomaterials and nanocomposites. Biologically synthesised nanomaterials are exhibiting excellent, unique and optimised properties. Micro organisms play an important role in the detoxification of metals through the reduction of metal ions. This process can be exploited for biosynthesis of NPs. Experiments were conducted by varying the concentrations of silver ions for analysing the formation of silver nanoparticles by Fusarium Oxysporum. The analysis has been done for extracellular and intracellular in the growing cell and whole cell sysytems. Silver nanoparticles formed by Fusarium Oxysporum was found to be purely extracellular. In this paper, from the experimental analysis, an attempt is being made to suggest a mechanism and elucidate the kinetics for the formation of silver nanoparticles.《科技与科学前沿趋势（Current Trends in Technology and Sciences，简称CTTS）》 纳米生物技术（nanobiotechnology）的兴起，揭示了更为绿色环保的制备与应用路径。目前，学界已针对各类纳米材料（nanomaterials）与纳米复合材料（nanocomposites）的生物合成开展了大量理论与实验研究。生物合成的纳米材料展现出优异、独特且经过优化的性能。 微生物（microorganisms）可通过还原金属离子实现金属解毒，该过程可应用于纳米颗粒（nanoparticles，简称NPs）的生物合成。本研究通过调控银离子浓度开展实验，以分析尖孢镰刀菌（Fusarium Oxysporum）介导的银纳米颗粒形成过程。研究针对生长细胞体系与全细胞体系中的胞内与胞外合成过程完成了分析。实验结果显示，尖孢镰刀菌合成的银纳米颗粒完全为胞外产物。 本文基于上述实验分析，尝试提出银纳米颗粒的形成机制，并阐明其形成动力学过程。