Core–shell nanoparticles based on an oxide metal: $ReO_3$ @Au (Ag) and $ReO_3$@$SiO_2 (TiO_2)$

Ghosh, Sandeep and Biswas, Kanishka and Rao, CNR (2007) Core–shell nanoparticles based on an oxide metal: $ReO_3$ @Au (Ag) and $ReO_3$@$SiO_2 (TiO_2)$. In: Journal of Materials Chemistry, 17 (23). pp. 2412-2417.

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Abstract

Core–shell nanoparticles based on metallic $ReO_3$ nanoparticles have been prepared for the first time. The nanoparticles with the metallic shell viz. $ReO_3$@Au and $ReO_3$@Ag were prepared by the reduction of metal salts over $ReO_3$ nanoparticle seeds. $ReO_3$@$SiO_2$ and $ReO_3$@$TiO_2$ core–shell nanoparticles were prepared by the hydrolysis of the organometallic precursors over the $ReO_3$ nanoparticles. The core–shell nanoparticles have been characterized by transmission electron microscopy, optical absorption spectroscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and Raman spectroscopy. The $ReO_3$@Au and $ReO_3$@Ag core–shell nanoparticles show composite plasmon absorption bands comprising contributions from both $ReO_3$ and Au (Ag) whereas $ReO_3$@$SiO_2$ and $ReO_3$@$TiO_2$ show shifts in the plasmon bands depending on the refractive index of the shell material.

Item Type:	Journal Article
Publication:	Journal of Materials Chemistry
Publisher:	The Royal Society of Chemistry
Additional Information:	Copyright of this article belongs to The Royal Society of Chemistry.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	28 Sep 2007
Last Modified:	19 Sep 2010 04:39
URI:	http://eprints.iisc.ac.in/id/eprint/11907

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