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Self-Assembly and Catalytic Activity of Metal Nanoparticles Immobilized in Polymer Membrane Prepared via Layer-by-Layer Approach

Dhar, Joydeep and Patil, Satish (2012) Self-Assembly and Catalytic Activity of Metal Nanoparticles Immobilized in Polymer Membrane Prepared via Layer-by-Layer Approach. In: ACS APPLIED MATERIALS & INTERFACES, 4 (3). pp. 1803-1812.

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Official URL: http://dx.doi.org/10.1021/am300068e

Abstract

Densely packed nanoparticles distributed in a stable and robust thin film is a highly preferred system for utilizing the various applications of nanoparticles. Here, we report covalent bond mediated layer-by-layer (LbL) self-assembled thin films of nanoparticles embedded in polymer membrane. Polymer with complementary functional group is utilized for fabrication of thin film via covalent bonding. UV-visible spectroscopy, atomic force microscopy (AFM) and scanning electron microscopy (SEM) were used to monitor the growth of LbL thin film. Subsequently, the composite thin film is used for catalysis of an organic electron transfer reaction of p-nitrophenol to p-aminophenol by sodium borohydride. The catalytic activity of these composite films is assayed multiple times, proving its applicability as a catalyst. The kinetic data obtained by monitoring reduction of p-nitrophenol suggest that the reaction rates are directly related to the sizes of the nanoparticle and porosity of the membrane.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the American Chemical Society
Keywords: nanoparticles;O-carboxymethyl chitosan;nanocomposite;layer-by-layer
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 27 Aug 2012 04:50
Last Modified: 27 Aug 2012 04:50
URI: http://eprints.iisc.ernet.in/id/eprint/44986

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