Nano Archive

Synthesis and optical properties of silver nanobars and nanorice

Wiley, Benjamin J. and Chen, Yeechi and McLellan, Joseph M. and Xiong, Yujie and Li, Zhi-Yuan and Ginger, David and Xia, Younan (2007) Synthesis and optical properties of silver nanobars and nanorice. NANO LETTERS, 7 (4). pp. 1032-1036.

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Silver nanobars with rectangular side facets and an average aspect ratio of 2.7 have been synthesized by modifying the concentration of bromide added to a polyol synthesis. Subsequent rounding of nanobars transformed them into nanorice. Due to their anisotropy, nanobars and nanorice exhibit two plasmon resonance peaks, scattering light both in the visible and in the near-infrared regions. With a combination of discrete-dipole approximation calculations and single-nanoparticle spectroscopy, we explored the effect of nanostructure aspect ratio and corner sharpness on the frequency of plasmon resonance. Near-field calculations and surface-enhanced Raman scattering measurements on single particles were performed to show how local field enhancement changes with both the wavelength and polarization of incident light.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:2590
Deposited By:Anuj Seth
Deposited On:12 Jan 2009 09:18
Last Modified:20 Jan 2009 11:50

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