Limits of localized heating by electromagnetically excited nanoparticles

Pawel Keblinski, David G. Cahill, Arun Bodapati, Charles R. Sullivan, T. Andrew Taton

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185 Scopus citations

Abstract

Based on an analysis of the diffusive heat flow equation, we determine limits on the localization of heating of soft materials and biological tissues by electromagnetically excited nanoparticles. For heating by rf magnetic fields or heating by typical continuous wave lasers, the local temperature rise adjacent to magnetic or metallic nanoparticles is negligible. However, heat dissipation for a large number of nanoparticles dispersed in a macroscopic region of a material or tissue produces a global temperature rise that is orders of magnitude larger than the temperature rise adjacent to a single nanoparticle. One approach for producing a significant local temperature rise on nanometer length scales is heating by high-power pulsed or modulated lasers with low duty cycle.

Original languageEnglish (US)
Article number054305
JournalJournal of Applied Physics
Volume100
Issue number5
DOIs
StatePublished - 2006

Bibliographical note

Funding Information:
This work was supported by the DOE Grant Nos. DE-FG02-04ER46104 and DEFG02-ER9145439.

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