Nano Archive

Surface plasmon enhancement at a liquid-metal-liquid interface

Cohanoschi, Ion and Thibert, Arthur and Toro, Carlos and Zou, Shengli and Hernandez, Florencio E. (2007) Surface plasmon enhancement at a liquid-metal-liquid interface. PLASMONICS, 2 (2). pp. 89-94. ISSN 1557-1955 (Print) 1557-1963 (Online)

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Herein, we report the first experimental demonstration of surface plasmon enhancement at a liquid-metal liquid interface using a pseudo-Kretschmann geometry. Pumping gold nanoparticle clusters at the interface of a p-xylene -water mixture, we were able to measure a fluorescence enhancement of three orders of magnitude in Rose Bengal at an excitation wavelength of 532 nm. The observed increase is due to the local electric field enhancement and the reduction of the fluorescence lifetime of dye molecules in the close vicinity of the metal surface. Theoretical modeling using the T-matrix method of the electric field intensity enhancement of emulated surfaces supports the experimental results. This new approach will open a new road for the study of dynamic systems using plasmonics.

Item Type:Article
Uncontrolled Keywords:surface plasmon resonance.; fluorescence enhancement; liquid-metal-liquid interface
Subjects:Physical Science > Nanophysics
ID Code:1899
Deposited By:Farnush Anwar
Deposited On:16 Dec 2008 15:37
Last Modified:12 Jan 2009 11:22

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