, Volume 2, Issue 5, pp 400-405,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 25 Mar 2010

Size-dependent joule heating of gold nanoparticles using capacitively coupled radiofrequency fields


Capacitively coupled shortwave radiofrequency fields (13.56 MHz) resistively heat low concentrations (∼1 ppm) of gold nanoparticles with a thermal power dissipation of ∼380 kW/g of gold. Smaller diameter gold nanoparticles (< 50 nm) heat at nearly twice the rate of larger diameter gold nanoparticles (≥50 nm), which is attributed to the higher resistivity of smaller gold nanostructures. A Joule heating model has been developed to explain this phenomenon and provides critical insights into the rational design and engineering of nanoscale materials for noninvasive thermal therapy of cancer.

These two authors made an equal contribution to the work.