Bacterial Kinetics for Control of Shape and Biogenic Synthesis of Nanoparticles: A Review

Nanoparticles (NPs) have many applications, such as in health and agriculture. One of these essential NPs is silver, which can be applied for drug delivery like encapsulation. Silver NPs (AgNPs) have excellent antibacterial activity. In addition, silver synthesis can be explored by electrochemical approaches on bacterium after exposure to silver. The synthesis of NPs can be achieved by biogenic synthesis, for instance, Morganella psychrotolerans , silver-resistant psychrophilic bacteria. Morganella psychrotolerans is a bacterium with the same character as Morganella morganii for synthesising AgNPs. The ability of Morganella morganii was expressed due to its specificity to maintain high deliberation of silver through the cell synthesis of rounded AgNPs and its ability to grow at lower temperatures (psychros: cold) in the range of 0–30°C. Anisotropy of AgNPs can be attained by controlling the bacteria growth kinetics. This synthesis system can be employed in a green biosynthetic approach to achieve shape control of NPs in an environmentally friendly, scalable and economical process. This review discusses Morganella psychrotolerans for controlling shape and biogenic synthesis with related aspects such as the synthesis mechanism, the influencing factors like shape and size, the application method and its development.