SYNTHESIS OF SILVER NANOPARTICLES USING EXTRACTS OF BRASSICA OLERACEA VAR. CAPITATA LEAVES AND THEIR ANTIMICROBIAL ACTIVITY

Habtamu, Mengesha Adal

dc.contributor.author	Habtamu, Mengesha Adal
dc.date.accessioned	2017-08-01T04:24:18Z
dc.date.available	2017-08-01T04:24:18Z
dc.date.issued	2017-08-01
dc.identifier.uri	http://hdl.handle.net/123456789/7501
dc.description	A project submitted in partial fulfillment of the requirement for the award of MASTERS OF SCIENCE In MATERIALS SCIENCE	en_US
dc.description.abstract	ABSTRACT In this study less complex and an environmental friendly process for the synthesis of antimicrobial silver nanoparticles using extracts of brassica oleracea var. capitata leaves is reported. UV-Vis spectroscopy absorption spectra indicated the formation and stability of silver nanoparticles. The absorption spectra of silver nanoparticle colloidal solution showed maximum absorption wavelength at 434 nm. The functional groups in the extract which are possibly responsible for the reduction of silver ion into silver nanoparticles were indicated by FTIR spectra. Silver nanoparticle sizes measured using Mie theory via UV-Vis absorption spectra showed that the average diameter in colloidal solution is about 10.8 ± 0.04 nm. The synthesized silver nanoparticles were effective in controlling the growth of human pathogens such as E.coli, S. aureus and P. aeruginosa with an average inhibition zone range from 8.5 mm to 12 rnrn. This study also revealed that aqueous extract of white cabbage leaves is capable of producing silver·. t,.,. nanoparticles that are stable for 2 days at room temperature without any sign ofprecipitation.	en_US
dc.subject	MATERIALS SCIENCES AND ENGINEERING	en_US
dc.title	SYNTHESIS OF SILVER NANOPARTICLES USING EXTRACTS OF BRASSICA OLERACEA VAR. CAPITATA LEAVES AND THEIR ANTIMICROBIAL ACTIVITY	en_US
dc.type	Thesis	en_US