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Proceedings Paper

Plasmonic heating of gold nanoparticles and its exploitation
Author(s): Michael B. Cortie; Xiaoda Xu; Humayer Chowdhury; Hadi Zareie; Geoffrey Smith
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Paper Abstract

Nanoscale particles of metals such as gold can interact with light by means of a plasmon resonance, even though they are much smaller than the wavelengths of visible light. The proportions of light that are absorbed and scattered vary with wavelength. Any light that is absorbed will cause heating of the particles, and this effect may potentially be exploited for solar glazing coatings, nanoscale lithography or medical treatments. The position of maximum absorption of an isolated spherical nanoparticle is 518 nm, but this may be significantly red-shifted by means of decreasing the symmetry to an prolate spheroid or 'nanorod’, or by producing a metal 'nanoshell’ on a dielectric core, or by aggregating insulated spherical particles. Absorption peaks in the vicinity of 655 nm for aggregated particles and 780 nm for prolate spheroids are demonstrated here. Absorbed energy is released as heat into the environment of the particles, and will cause a temperature rise within the particle the magnitude of which depends upon the value of the effective heat transfer coefficient between particle and environment. The latter is not known, but we show how highly localized temperature rises of some tens of Celsius might be conceivable in systems illuminated by sunlight.

Paper Details

Date Published: 28 February 2005
PDF: 9 pages
Proc. SPIE 5649, Smart Structures, Devices, and Systems II, (28 February 2005); doi: 10.1117/12.582207
Show Author Affiliations
Michael B. Cortie, Univ. of Technology Sydney (Australia)
Xiaoda Xu, Univ. of Technology Sydney (Australia)
Humayer Chowdhury, Univ. of Technology Sydney (Australia)
Hadi Zareie, Univ. of Technology Sydney (Australia)
Geoffrey Smith, Univ. of Technology Sydney (Australia)


Published in SPIE Proceedings Vol. 5649:
Smart Structures, Devices, and Systems II
Said F. Al-Sarawi, Editor(s)

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