N. John Sushma

Novel, Fast, Bio-Derivatized Sonochemical Synthesis of Gold Nanoparticles by Using Piper betle Leaf Broth as a Reducing and Capping Agent

The use of biomolecules hosted products for synthesis of nano sized materials of increasing interest to benign medicinal field. We report a biomolecules hosting, rapid, environmentally benign, bio-degradable, non-toxic, and sonochemical synthesis of gold nanoparticles by using piper betle leaf broth as a reducing and capping agent. The aqueous reaction of medium containing gold nanoparticles showed a peak at 540 nm was studied by UV-Vis spectra. In addition, we determined the size of the nanoparticles and optical energy gap from the surface plasmon absorption peak. The crystalline structural characteristics of a biomolecules hosted gold nanoparticles were studied by X-ray diffraction. The morphology of nanoparticles was analyzed by scanning electron microscopy. The stoichiometric chemical composition of elemental presence in the medium was determined by energy dispersive spectrum. The presences of biomolecules which are act as capping agents around the nanoparticles were studied by fourier transform infrared spectroscopy.

Synthesis and spectroscopic characterization of palladium nanoparticles by using broth of edible mushroom extract

Reliable and eco-friendly process for the synthesis of metallic nanoparticles is an important step in the field of Nanoscience and Technology. In the present study we fabricate the palladium nanoparticles by using mushroom extract as a reducing and capping agent. It was observed that the synthesis procedure was quite simple and in a single step benign palladium nanoparticles were formed. UV-visible spectrum of the aqueous medium containing palladium ions demonstrated a peak corresponding to the plasmon absorbance of palladium nanoparticles. X-Ray diffraction (XRD) spectrum reveals the crystalline structure of palladium nanoparticles. The morphology of the biomolecules-stabilized palladium nanoparticles were determined by the atomic force microscopy (AFM) image. Energy dispersive X-ray analysis (EDS) evidences the presence of palladium nanoparticles in the aquatic solution of mushroom extract. FTIR analysis of the nanoparticles likewise indicated the possible presence of functional groups in biomolecules, which may be acting as capping agents around the nanoparticles.