Electromagnetic heating effect of aggregated gold nanoparticle colloids

Xiaoming Liu, Hui Jiuan Chen, Xiaodong Chen, Yasir Alfadhl, Junsheng Yu, Dongsheng Wen

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Gold nanoparticles (GNPs) have been recently investigated intensively for potential hyperthermia treatment of malignant cancer cells in combination with radiofrequency (RF) electromagnetic (EM) fields/waves. However, many controversial results have been reported on whether GNPs can be heated by EM fields. It has been suggested that aggregated GNPs may be heated significantly by a RF field, which however has not been examined experimentally. This work proposes a novel electric treatment of mono-dispersed particles to create aggregated GNPs, and conducts an investigation of their bulk heating behavior under a 655 nm laser and a 13.56 MHz RF electric field. It is revealed that the heating rates of aggregated colloids are significantly higher than those of mono-dispersed GNPs for the 655 nm laser, whereas at 13.56 MHz, the heating effects are barely noticeable for both aggregated and mono-dispersed colloids. Various possible reasons are discussed and the negligible electric field enhancement is believed to be responsible at 13.56 MHz.

Original languageEnglish
Article number094903
JournalJournal of Applied Physics
Volume115
Issue number9
DOIs
StatePublished - 7 Mar 2014
Externally publishedYes

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