Antibacterial and Sensing Properties of Dextrose Reduced Starch − Capped Silver Nanoparticles Synthesised via a Completely Green Method

We herein report the antibacterial and sensing properties of dextrose reduced starch-capped silver nanoparticles (Ag-NPs). The synthesis involves the use of water, starch, and dextrose which are environmentally benign materials as the solvent, stabilizing, and reducing agent respectively while AgNO3 was used as the silver precursor. The as-synthesised Ag-NPs were characterized using UV-vis absorption spectroscopy and high resolution transmission electron microscopy (HRTEM). Antibacterial study shows that the as-synthesised Ag-NPs show good antibacterial activities against E coli and P. aeruginosa while the sensitivity reaction showed that the as-synthesised Ag-NPs are very sensitive to H2O2, one of the reactive oxygen species (ROS) that possess a serious threat to biological system upto a concentration of 10−10M.