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Surface Plasmon Spectroscopy of Single Metal Nanocrystals

Paul Mulvaney 

The University of Melbourne, School of Chemistry, Parkville, VIC, Melbourne 3010, Australia

Abstract
In this talk I will provide an overview of our recent research into the spectroscopy and surface chemistry of single gold nanocrystals.  In the first part, I focus on the possibility to study the optical properties of single metal particles using dark-field microscopy. It is now possible to routinely collect the scattered light from single metal nanocrystals and use this to study the effects of particle size and shape on the surface plasmon (SP) resonances. We show that the linewidth of the SP resonance is acutely sensitive to the particle end cap geometry, to the aspect ratio and to atomic roughness on the particle surface. In the second part I will discuss the possibilities to study catalysis on single nanocrystals and the ability to actively modulate the surface plasmon bands of single gold nanocrystals by electrochemical charging of the particles. This enables the reversible tuning of the band by some 15nm.

1. Electronic Tuning of the Surface Plasmon Resonance of Single Gold Nanorods, C. Novo, A. M. Funston, A. Gooding, P. Mulvaney, submitted.

2. Drastic Surface Plasmon Mode Shifts in Gold Nanorods due to Electron Charging, Paul Mulvaney, Jorge Pérez-Juste, Michael Giersig, Luis M. Liz-Marzán, Carlos Pecharromán, Plasmonics, 1, 61 (2006).

3. Gold nanorod extinction spectra, S.Prescott, P.Mulvaney, J. Appl. Phys. 99,123504 (2006).

 

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Presentation: Keynote lecture at E-MRS Fall Meeting 2008, Symposium E, by Paul Mulvaney
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-06-01 06:02
Revised:   2009-06-07 00:48