Polymerization of benzylthiocyanate on silver nanoparticles and the formation of polymer coated nanoparticles

Rajeev Kumar, V. R. ; Pradeep, T. (2006) Polymerization of benzylthiocyanate on silver nanoparticles and the formation of polymer coated nanoparticles Journal of Materials Chemistry, 16 (9). pp. 837-841. ISSN 0959-9428

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Official URL: http://dx.doi.org/10.1039/b513487k

Related URL: http://dx.doi.org/10.1039/b513487k

Abstract

Polymerization of benzylthiocyanate on silver nanoparticles produces organic shell covered nanoparticles with controllable thickness in a one-pot process. Gram scale quantities of core-shell materials have been synthesized by this method. The methodology involves the addition of the precursor into Ag-citrate solution and the shell nucleates over a period of three weeks with complete precipitation of the core-shell material which can be dispersed subsequently in organic solvents. The material has been characterized using transmission electron microscopy, X-ray diffraction, FT-IR, laser desorption mass spectrometry, thermogravimetry, surface enhanced resonance Raman spectroscopy (SERRS) and Raman imaging. A typical composite material consists of a silver core of 40 nm diameter coated with a polymeric shell of 8 nm thickness. The polymer exhibits characteristic features in mass spectrometry and vibrational spectroscopy. The core-shell structure of nanoparticles is imaged for the first time using the Raman intensity of the shell. Proton assisted polymerization of benzylthiocyanate occurs on the silver surface, leading to a linear chain which subsequently deposits on the nanoparticle surface resulting in the core-shell structure.

Item Type:Article
Source:Copyright of this article belongs to Royal Society of Chemistry.
ID Code:27347
Deposited On:10 Dec 2010 12:43
Last Modified:17 May 2016 10:34

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