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A facile route to synthesize silver nanoparticles in polyelectrolyte capsules

Anandhakumar, S and Raichur, Ashok M (2011) A facile route to synthesize silver nanoparticles in polyelectrolyte capsules. In: Colloids and Surfaces B: Biointerfaces, 84 (2). pp. 379-383.

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Official URL: http://dx.doi.org/10.1016/j.colsurfb.2011.01.029

Abstract

We are reporting a novel green approach to incorporate silver nanoparticles (NPs) selectively in the polyelectrolyte capsule shell for remote opening of polyelectrolyte capsules. This approach involves in situ reduction of silver nitrate to silver NPs using PEG as a reducing agent (polyol reduction method). These nanostructured capsules were prepared via layer by layer (LbL) assembly of poly(allylamine hydrochloride) (PAH) and dextran sulfate (DS) on silica template followed by the synthesis of silver NPs and subsequently the dissolution of the silica core. The size of silver nanoparticles synthesized was 60 +/- 20 nm which increased to 100 +/- 20 nm when the concentration of AgNO3 increased from 25 mM to 50 mM. The incorporated silver NPs induced rupture and deformation of the capsules under laser irradiation. This method has advantages over other conventional methods involving chemical agents that are associated with cytotoxicity in biological applications such as drug delivery and catalysis. (C) 2011 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Polyelectrolyte capsules;Silver nanoparticles;Polyol reduction;Laser activated drug delivery
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 06 May 2011 07:45
Last Modified: 06 May 2011 07:45
URI: http://eprints.iisc.ernet.in/id/eprint/37396

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