Chepurirao, R.K. and Trivedi, D.C. (2005) Synthesis and characterization of fatty acids passivated silver nanoparticles—their interaction with PPy. Synthetic Metals, 155 (2). pp. 324-327.

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Abstract

Metal nanoparticles have applications in the area of catalysis, opto-electronics due to their size dependent optical, electrical and electronic properties. It is believed that when the size of the particle tuned to one nanometer, the quantum effect is expected in their optical properties. Silver nanoparticles exhibit size dependant absorptions in the UV–vis region and also show anti-bacterial properties. In the present paper, we report the synthesis of silver nanoparticles passivated by stearic, palmitic and lauric acids. Three reducing agents, which are moderate strong to mild, formaldehyde, dimethyl formamide and triethanol amine are used to synthesize the nanoparticles as solids. The solids are redispersible in non-polar solvents. The IR spectra showed the existence of adsorbed fatty acids. It is shown that the stability of the silver nanoparticles in toluene solvent is decreased when the chain length of the fatty acid is decreased. The toluene solution of these nanoparticles exhibited a surface plasmon resonanace in the range 420–462 nm. Results showed that use of triethanol amine is the best choice in obtaining lower particle sizes. The nanoparticles are charecterized by UV–vis, FTIR, XRD and AFM techniques. The interaction of these particles with the conducting polymer PPy is explored.

Item Type:	Article
Uncontrolled Keywords:	Silver; Nanoparticle; Surfaceplasmon; Passivated; Fattyacids; Reduction
Subjects:	Functional Materials Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	17 Jan 2012 14:25
Last Modified:	17 Jan 2012 14:25
URI:	http://cecri.csircentral.net/id/eprint/202

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