Self-assembled hollow ZnO nano and micro donut shape by starch and its antimicrobial potentials

Abstract Zinc is a trace element which is very essential for maintaining proper health of human. Recently there is an increased attention in the synthesis of zinc oxide particles due to their antimicrobial properties. In the present work, Zinc oxide particles were synthesized using starch as a reducing and stabilizing agent. The synthesized ZnO microparticles were characterized by various techniques such as FTIR (Fourier Transform Infrared spectroscopy), XRD (X-Ray diffraction), SEM (Scanning electron microscopy) and EDS (energy-dispersive X-ray spectroscopy). The FTIR analysis showed the presence of starch groups found in the reaction mixture responsible for the reduction. XRD revealed the presence of high purity amorphous ZnO nanoparticles. The morphology of the synthesized ZnO micro and nanoparticles revealed donut-shaped self-assembled materials. Further antimicrobial activity of the synthesized ZnO particles were also performed against Enterobacteraerogenes and Staphylococcus epidermidis, which showed the excellent antimicrobial activity of the synthesized material. The synthesized ZnO nano and microparticles could be used for biomedical applications due to their high antimicrobial properties. Due to its high porosity, the synthesized materials can also be focused on drug delivery applications in future.