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Abstract

SYNTHESIS, CHARACTERIZATION OF SARGASSUM MUTICUM AQUEOUS EXTRACT MEDIATED SILVER DOPED ZINC NANOPARTICLES FOR ANTIMICROBIAL ACTIVITY

R. Manjula, K. Chandramouli, N. Supraja and T. N. V. K. V. Prasad*

ABSTRACT

Biological synthesis of nanoparticles is a relatively new emerging field of nanotechnology which has economic and eco-friendly benefits over chemical and physical processes of synthesis. In the present work, for the first time, the brown marine algae Sargassum muticum (S. muticum) aqueous extract was used as a reducing agent for the synthesis of nanostructure silver doped zinc nanoparticles (Ag-ZnNPs). The surface plasmon resonance (SPR) of the formed AgNPs was recorded at 453 nm using UV-Visible spectrophotometer. The molecules involved in the formation of Ag-ZnNPs were identified by Fourier transform infrared spectroscopy (FT-IR) confirms the presence of aldehydes, alkyls, alkenes, surface morphology was studied by using scanning electron microscopy (SEM), SEM micrograph clearly revealed the size of the Ag-ZnNPs was in the range of 2mm with spherical, hexagonal in shape and poly-dispersed nature while in EDX confirms the composition of nanoparticles present in Sargassum muticum aqueous extract, and X-ray diffraction spectroscopy (XRD) was used to determine the crystalline structure. High positive Zeta potential (36.3mV) and particle size was (102nm) of formed Ag-ZnNPs indicates the stability and XRD pattern revealed the crystal structure of the AgNPs by showing the Bragg’s peaks corresponding to (111), (200), (220), (311) and (222) planes of face centered cubic crystal phase of silver doped zinc nanoparticles, The synthesized Ag-ZnNPs exhibited effective antimicrobial activity at different concentrations (0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0).

Keywords: Sargassum Muticum; Silver Doped Zinc Nanoparticles; Antimicrobial Activity.


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