Geranium Leaf Assisted Biosynthesis of Silver Nanoparticles

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.

Synthesis and Characterization of Silver Nanoparticles From Marine Brown Seaweed and Its Antifungal Efficiency Against Clinical Fungal Pathogens

“…No change in peak due to the excitations of SPR of nanoparticles indicates that nanoparticles are in spherical structure which was further confirmed by TEM image. Similarly, Shankar et al [14] reported that geranium leafassisted silver nanoparticles formed the SPR band at 440 nm due to the excitation of longitudinal plasmon vibrations.…”

Nanotechnology in agriculture, livestock, and aquaculture in China. A review

“…But, nanotechnology is also a double-edged sword; although nanotechnologies can be used in many areas and many beneficial effects have been achieved, it also involves many adverse effects or unclear hazards to humans, animals, plants, and the environment. Government and regulatory authorities (regulatory agencies, certification bodies) as well as environmental, health and safety councils (such as Environment Health Services), non-governmental organizations, and scientific authorities all over the world are realizing the importance of nanotechnologies risk assessment (Vyom et al 2012), and have given their own suggestion, view, and guidance (USEPA 2007;RS/RAE 2004;COT-COM-COC 2005;Scenihr 2009;SCCP 2007;Dhawan et al 2011;FOE 2006).…”

Biological synthesis of Silver nanoparticles (Ag-NPS) by Lawsonia inermis (Henna) plant aqueous extract and its antimicrobial activity against human pathogens

“…The silver nanoparticles have the ability to anchor to the bacterial cell wall and subsequently penetrate and followed by the disruption of ATP production and DNA replication, thereby causing structural changes in the cell membrane and death of the cell. Evidently report of some authors mentioned that there is the formation of "pits" on the cell surface when accumulating these nanoparticles on the cell surface (20)(21)(22)(23)(24) and causes damage to the microbes.…”