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Surface plasmon resonance sensitivity of metal nanostructures: Physical basis and universal scaling in metal nanoshells

Jain, Prashant K. and Ei-Sayed, Mostafa A. (2007) Surface plasmon resonance sensitivity of metal nanostructures: Physical basis and universal scaling in metal nanoshells. JOURNAL OF PHYSICAL CHEMISTRY C, 111 (47). pp. 17451-17454.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp0773177

Abstract

In this letter, we show using extended Mie theory simulations that the, sensitivity of the surface plasmon resonance (SPR) of a dielectric core-metal nanoshell increases near-exponentially as the ratio of the shell thickness-to-core radius is decreased. The plasmon sensitivity thus shows the same universal scaling behavior established recently for plasmon coupling in metal nanoshells and that in metal nanoparticle pairs. From these observations, we propose that,the sensitivity is determined by the ease of surface polarization of the electrons in the nanostructure by the light. This can be used as a generalized physical principle for designing plasmonic nanostructures for effective SPR chemical and biological sensing.

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Analytical Science > Nanotechnology for sensing and actuating
Material Science > Nanostructured materials
ID Code:3259
Deposited By:Farnush Anwar
Deposited On:15 Jan 2009 16:22
Last Modified:28 Jan 2009 16:54

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