Geranium leaf assisted biosynthesis of silver nanoparticles

Shiv Shankar, S. ; Ahmad, Absar ; Sastry, Murali (2003) Geranium leaf assisted biosynthesis of silver nanoparticles Biotechnology Progress, 19 (6). pp. 1627-1631. ISSN 8756-7938

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Official URL: http://onlinelibrary.wiley.com/doi/10.1021/bp03407...

Related URL: http://dx.doi.org/10.1021/bp034070w

Abstract

Development of biologically inspired experimental processes for the synthesis of nanoparticles is evolving into an important branch of nanotechnology. In this paper, we report on the use of Geranium (Pelargonium graveolens) leaf extract in the extracellular synthesis of silver nanoparticles. On treating aqueous silver nitrate solution with geranium leaf extract, rapid reduction of the silver ions is observed leading to the formation of highly stable, crystalline silver nanoparticles in solution. Transmission electron microscopy analysis of the silver particles indicated that they ranged in size from 16 to 40 nm and were assembled in solution into quasilinear superstructures. The rate of reduction of the silver ions by the geranium leaf extract is faster than that observed by us in an earlier study using a fungus, Fusarium oxysporum, thus highlighting the possibility that nanoparticle biosynthesis methodologies will achieve rates of synthesis comparable to those of chemical methods. This study also represents an important advance in the use of plants over microorganisms in the biosynthesis of metal nanoparticles.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
ID Code:47246
Deposited On:07 Jul 2011 05:19
Last Modified:07 Jul 2011 05:19

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