Superatom Paramagnetism Enables Gold Nanocluster Heating in Applied Radiofrequency Fields

The Au-102(pMBA)(44) nanocluster becomes a superatom paramagnet after chemical oxidation. Solutions of paramagnetic Au-102(pMBA)(44) heat In an oscillating magnetic field component of an RF field, but not In the electric component. Combined, these experiments suggest that paramagnetic Au-102(pMBA)(44) heats through Interactions of spin magnetic moment with an external oscillating magnetic field. These results may clarify some current controversy regarding gold nanoparticle heating in radiofrequency fields.