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2014 ; 6
(15
): 8459-72
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Radiofrequency heating pathways for gold nanoparticles
#MMPMID24962620
Nanoscale
2014[Aug]; 6
(15
): 8459-72
PMID24962620
show ga
This feature article reviews the thermal dissipation of nanoscopic gold under
radiofrequency (RF) irradiation. It also presents previously unpublished data
addressing obscure aspects of this phenomenon. While applications in biology
motivated initial investigation of RF heating of gold nanoparticles, recent
controversy concerning whether thermal effects can be attributed to nanoscopic
gold highlight the need to understand the involved mechanism or mechanisms of
heating. Both the nature of the particle and the nature of the RF field influence
heating. Aspects of nanoparticle chemistry which may affect thermal dissipation
include the hydrodynamic diameter of the particle, the oxidation state and
related magnetism of the core, and the chemical nature of the ligand shell.
Aspects of RF which may affect thermal dissipation include power, frequency and
antenna designs that emphasize relative strength of magnetic or electric fields.
These nanoparticle and RF properties are analysed in the context of three heating
mechanisms proposed to explain gold nanoparticle heating in an RF field. This
article also makes a critical analysis of the existing literature in the context
of the nanoparticle preparations, RF structure, and suggested mechanisms in
previously reported experiments.
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