Microwave-assisted, surfactant-free synthesis of air-stable copper nanostructures and their SERS study

Dar, Ibrahim M and Sampath, S and Shivashankar, SA (2012) Microwave-assisted, surfactant-free synthesis of air-stable copper nanostructures and their SERS study. In: JOURNAL OF MATERIALS CHEMISTRY, 22 (42). pp. 22418-22423.

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Abstract

A simple, rapid, and surfactant-free synthesis of crystalline copper nanostructures has been carried out through microwave irradiation of a solution of copper acetylacetonate in benzyl alcohol. The structures are found to be stable against oxidation in ambient air for several months. High-resolution electron microscopy (SEM and TEM) reveals that the copper samples comprise nanospheres measuring about 150 nm in diameter, each made of copper nanocrystals similar to 7 nm in extension. The nanocrystals are densely packed into spherical aggregates, the driving force being minimization of surface area and surface energy, and are thus immune to oxidation in ambient air. Such aggregates can also be adherently supported on SiO2 and Al2O3 when these substrates are immersed in the irradiated solution. The air-stable copper nanostructures exhibit surface enhanced Raman scattering, as evidenced by the detection of 4-mercaptobenzoic acid at 10(-6) M concentrations.

Item Type:	Journal Article
Publication:	JOURNAL OF MATERIALS CHEMISTRY
Publisher:	Royal society of chemistry
Additional Information:	Copyright for this article belongs to ROYAL SOC CHEMISTRY, ENGLAND
Department/Centre:	Division of Biological Sciences > Centre for Neuroscience Division of Chemical Sciences > Inorganic & Physical Chemistry Division of Chemical Sciences > Materials Research Centre
Date Deposited:	28 Dec 2012 08:52
Last Modified:	28 Dec 2012 08:52
URI:	http://eprints.iisc.ac.in/id/eprint/45464

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