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First hyperpolarizabilities of unprotected and polymer protected copper nanoparticles prepared by laser ablation

Chandra, Manabendra and Indi, SS and Das, Puspendu K (2006) First hyperpolarizabilities of unprotected and polymer protected copper nanoparticles prepared by laser ablation. In: Chemical Physics Letters, 422 (1-3). pp. 262-266.

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Abstract

In this Letter, we report the first hyperpolarizability of Cu nanoparticles in organic media with and without any stabilizer. Copper nanoparticles of ~9 nm size were prepared by laser ablation of a Cu-metal target immersed in isopropanol both in the presence and absence of polyvinyl pyrrolidone (PVP, a stabilizer and a surface modification agent). The first hyperpolarizability of the nanoparticles was measured by the hyper-Rayleigh scattering (HRS) technique. Both types of nanoparticles show large second harmonic response and the β values are $(414 ± 19) × 10^−^3^0$ $esu/atom^1^/^2$ for the unprotected and $(808 ± 12) × 10^−^3^0$ $esu/atom^1^/^2$ for the PVP protected Cu-nanoparticles.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 27 May 2006
Last Modified: 19 Sep 2010 04:27
URI: http://eprints.iisc.ernet.in/id/eprint/6943

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