ULTRASONIC WAVES ASSISTED SYNTHESIS OF IRON AND ANTIBACTERIAL SILVER NANO PARTICLES.

In an attempt to reduce hazardous wastes, a solvent free green route for the synthesis of Silver and Iron Nano particles using the bio-reductantgreen tea extract is reported. The extract is acting both as reducing and capping agent. The bio-reduction process was intensified with ultrasonic waves of frequency of 40 kHz. Implosion of microscopic bubbles (Cavities) at the compression phase of the ultrasonic waves produce an ambient condition of temperature and pressure resulting in the easy formation of Silver and Iron nano particles. The initial characterization of the synthesized Silver and Iron nano particles was done by UV-Visible Spectroscopy which showed a characteristic absorption peak at 453nm and 265nm for Silver and Iron Nano particles respectively. The elemental composition analysis was done by Energy Dispersive X-ray diffraction Technique (EDAX). The active groups involved in the stabilization of the nano particles were analyzed by IR Spectroscopy. The size and morphology of the synthesized nano particles were determined by Scanning Electron Microscopy (SEM). The effect of ultrasound on the reduction reaction rate was assessed and it was found to get enhanced. The synthesized silver nano particles showed potential anti-bacterial activity.