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Applied Nanoscience

, Volume 5, Issue 8, pp 983–991

First Online: 18 January 2015Received: 11 December 2014Accepted: 22 December 2014

Abstract

This work exemplifies a simple and rapid method for the synthesis of silver nanodendrite with a novel electrochemical technique. The antibacterial activity of these silver nanoparticles Ag NPs against pathogenic bacteria was investigated along with the routine study of optical and spectral characterisation. The optical properties of the silver nanoparticles were characterised by diffuse reflectance spectroscopy. The optical band gap energy of the electrodeposited Ag NPs was determined from the diffuse reflectance using Kubelka–Munk formula. X-ray diffraction XRD studies were carried out to determine the crystalline nature of the silver nanoparticles which confirmed the formation of silver nanocrystals. The XRD pattern revealed that the electrodeposited Ag NPs were in the cubic geometry with dendrite preponderance. The average particle size and the peak broadening were deliberated using Debye–Scherrer equation and lattice strain due to the peak broadening was studied using Williamson–Hall method. Surface morphology of the Ag NPs was characterised by high-resolution scanning electron microscope and the results showed the high degree of aggregation in the particles. The antibacterial activity of the Ag NPs was evaluated and showed unprecedented level antibacterial activity against multidrug resistant strains such as Staphylococcus aureus, Bacillus subtilis, Klebsiella pneumonia and Escherichia coli in combination with Streptomycin.

KeywordsAntibacterial activity Silver nanodendrite UV-DRS Williamson–Hall method Kubelka–Munk plot  Download fulltext PDF



Autor: R. Singaravelan - S. Bangaru Sudarsan Alwar

Fuente: https://link.springer.com/







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