Observation of intrinsic size effects in the optical response of individual gold nanoparticles

Details Observation of intrinsic size effects in the optical response of individual gold nanoparticles Observation of intrinsic size effects in the optical response of individual gold nanoparticles

2007-04-28

arxiv.org/abs/0704.3814v2

Nano Letters 5, 3 (15/02/2005) 515

Physics

Optics

Scientific paper

10.1021/nl050062t

The Photothermal Heterodyne Imaging method is used to study for the first time the absorption spectra of individual gold nanoparticles with diameters down to 5 nm. Intrinsic size effects wich result in a broadening of the Surface Plasmon resonance are unambiguously observed. Dispersions in the peak energies and homogeneous widths of the single particle resonances are revealed. The experimental results are analysed within the frame of Mie theory.

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