Tunable variation of optical properties of polymer capped gold nanoparticles

Haridas, M and Srivastava, S and Basu, JK (2008) Tunable variation of optical properties of polymer capped gold nanoparticles. In: The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics, 49 (1). pp. 93-100.

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Abstract

Optical properties of polymer capped gold nanoparticles of various sizes (diameter 3−6 nm)have been studied. Wepresent a new scheme to extract size dependent variation of total dielectric func-tion of gold nanoparticles from measured UV-Vis absorption data. The new scheme can also be used, in principle, for other related systems as well. We show how quantum effect, surface atomic co-ordinationand polymer-nanoparticle interface morphology leads to a systematic variation in interband part of thedielectric function of gold nanoparticles, obtained from the analysis using our new scheme. Careful analysisenables identification of the possible changes to the electronic band structure in such nanoparticles.

Item Type:	Journal Article
Publication:	The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Publisher:	Springer
Additional Information:	copy right of this article belongs to Springer.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	05 Nov 2009 09:31
Last Modified:	19 Sep 2010 04:52
URI:	http://eprints.iisc.ac.in/id/eprint/16449

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