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Biofabrication of nanoparticles using plant sources is considered the most vital method for nanoparticle syntheses, as the use of plant materials not only makes the process eco-friendly but also its abundance makes it less expensive. In this study, we aimed to develop a rapid and simple procedure for the synthesis of gold nanoparticles using aqueous Cressa cretica leaf extract as a reducing agent as well as a capping agent. The characteristics of biofabricated gold nanoparticles were examined using ultraviolet-visible absorption spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray powder diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). As the results, the biofabricated gold nanoparticles were of hexagonal, pentagonal, spherical and rod shapes with 15-22 nm in size. FTIR studies disclosed that hydroxyl, amide and amine groups of Cressa cretica leaf broth were liable for the formation and stabilization of the gold nanoparticles. The antibacterial activity of the gold nanoparticles against human pathogens showed significant zones of inhibition. It confirmed that the biofabricated gold nanoparticles have great promise as an antibacterial agent. The biofabricated gold nanoparticles were used as catalysts in the reduction of 4-nitrophenol using sodium borohydride. The catalytic activity studies exhibited that the biofabricated gold nanoparticles had prominent catalytic activity. Furthermore, this green biofabric approach is a fast and easy alternative to chemical synthesis.

In the present study, bio-meditated silver nanoparticles have been synthesized using Jasminum auriculatum stem extracts. The silver nanoparticles were confirmed using UV-visible and FT-IR spectra. The size and morphology of silver nanoparticles were confirmed using XRD, SEM and EDAX techniques. The antibacterial activity of green synthesized silver nanoparticles was assessed by disc diffusion method against human pathogens. The antibacterial studies indicate that green synthesized silver nanoparticles have several pharmaceutical applications for the management of deadly human pathogens.

Prussian blue nanocubes were synthesized via a hydrothermal method.

A simple one-pot green approach for the biosynthesis of gold nanoparticles (AuNPs) by reducing chloroauric acid (HAuCl4) with extract of Xanthium strumarium or Xanthium Indicum Kone is described. The biosynthesized new materials were extensively characterized by UV Visible spectroscopy, FT-IR, XRD, SEM and TEM analysis. The formation of Gold nanoparticles from plant material was confirmed. TEM image revealed that most of the particles were found in a spherical shape with size ranging from 9.60 nm to 11.70 nm. The size, shape and purity were well analyzed. The biological profile such as In vitro antibacterial activity and In vitro antifungal activity was investigated and shows the significance of their application towards biological activity.