Permanent Magnetism in Thiol Capped

In spite of the diamagnetic behavior exhibited by bulk ZnO and Au, a ferromagnetic-like behavior is induced in nanoparticles of both systems by appropriate surface functionalization. By capping with thiol deriva-tized molecules, magnetic hysteresis is observed even at room temperature, whereas the magnetization has a very little temperature dependence. Cap-ping induces an alteration of their electronic configuration that depends on the capping molecule, as evidenced by X-ray absorption spectroscopy, that strongly affects their magnetic properties. PACS numbers: 75.75.+a, 73.22.–f, 75.30.Hx 1