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Surface Plasmon Resonance from Bimetallic Interface in Au-Ag Core-Shell Structure Nanowires

Zhu, Jian (2009) Surface Plasmon Resonance from Bimetallic Interface in Au-Ag Core-Shell Structure Nanowires. Nanoscale Research Letters, 4 (9). pp. 977-981.

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Official URL: http://www.springerlink.com/content/342x2436185402...

Abstract

Transverse surface plasmon resonances (SPR) in Au–Ag and Ag–Au core–shell structure nanowires have been investigated by means of quasi-static theory. There are two kinds of SPR bands resulting from the outer surface of wall metal and the interface between core and wall metals, respectively. The SPR corresponding to the interface, which is similar to that of alloy particle, decreases and shifts obviously with increasing the wall thickness. However, the SPR corresponding to the outer surface, which is similar to that of pure metal particle, increases and shifts slightly with increasing the wall thickness. A mechanism based on oscillatory surface electrons under coulombic attraction is developed to illuminate the shift fashion of SPR from bimetallic core–shell interface. The net charges and extra coulombic force in metallic wall affect the SPR energy and the shift fashion.

Item Type:Article
Uncontrolled Keywords:Surface plasmon resonance (SPR) - Interface - Bimetallic - Core–shell structure - Nanowires
Subjects:Physical Science > Nanophysics
Analytical Science > Nanotechnology for sensing and actuating
Analytical Science > Beam methods
ID Code:6937
Deposited By:Lesley Tobin
Deposited On:17 Aug 2009 14:48
Last Modified:17 Aug 2009 14:48

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