Superatom paramagnetism enables gold nanocluster heating in applied radiofrequency fields

摘要

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.