  It is shown that nanoparticles made of low $T_c$ superconductors have large
diamagnetic response at temperatures several orders of magnitude above $T_c$.
Most features of the recently observed Giant diamagnetism of Au nanorods are
explained in terms of superconducting fluctuations, except for the huge
magnitude of the effect.

Mesoscale and Nanoscale Physics;Superconductivity