OICC Press International Nano Letters 2228-5326 5 2 (June 2015) 2015 02 26 Controlled green synthesis of silver nanoparticles by Allium cepa and Musa acuminata with strong antimicrobial activity 10.1007/s40089-015-0142-y EN Geetika Sahni Department of Biomedical Engineering, National University of Singapore, Singapore, 119077, SG Lovely Professional University, Phagwara, 144401, IN Amit Panwar Lovely Professional University, Phagwara, 144401, IN Centre for Nanotechnology, Indian Institute of Technology, Roorkee, 247667, IN Balpreet Kaur School of Biosciences and Biotechnology, Lovely Professional University, Phagwara, Punjab, 144411, IN Journal Article 2015 02 26 Abstract A controlled “green synthesis” approach to synthesize silver nanoparticles by Allium cepa and Musa acuminata plant extract has been reported. The effect of different process parameters, such as pH, temperature and time, on synthesis of Ag nanoparticles from plant extracts has been highlighted. The work reports an easy approach to control the kinetics of interaction of metal ions with reducing agents, stabilized by ammonia to achieve sub-10 nm particles with narrow size distribution. The nanoparticles have been characterized by UV–Visible spectra and TEM analysis. Excellent antimicrobial activity at extremely low concentration of the nanoparticles was observed against Escherichia coli , Pseudomonas aeruginosa , Bacillus subtilis and Fusarium oxysporum which may allow their exploitation as a new generation nanoproduct in biomedical and agricultural applications.