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Electromagnetic absorption mechanisms in metal nanospheres: Bulk and surface effects in radiofrequency-terahertz heating of nanoparticles

G. W. Hanson ; R. C. Monreal ; S. Peter Apell (Institutionen för teknisk fysik, Kondenserade materiens teori)
Journal of Applied Physics (0021-8979). Vol. 109 (2011), 12,
[Artikel, refereegranskad vetenskaplig]

We report on the absorption of electromagnetic radiation by metallic nanoparticles in the radio and far infrared frequency range, and subsequent heating of nanoparticle solutions. A recent series of papers has measured considerable radio frequency (RF) heating of gold nanoparticle solutions. In this work, we show that claims of RF heating by metallic nanoparticles are not supported by theory. We analyze several mechanisms by which nonmagnetic metallic nanoparticles can absorb low frequency radiation, including both classical and quantum effects. We conclude that none of these absorption mechanisms, nor any combination of them, can increase temperatures at the rates recently reported. A recent experiment supports this finding.

Nyckelord: far-infrared absorption, gold nanoparticles, particles, spheres, aggregation, destruction, size



Denna post skapades 2011-08-09. Senast ändrad 2014-03-24.
CPL Pubid: 143913

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Fysik

Chalmers infrastruktur