2015 年 36 巻 9 号 p. 454-458
Polyoxometalates (POMs) are condensation products of transition metal oxyanions. POMs are expected as nanodevice because of its high redox potential and the semiconductive characteristics. Electric conductance of single {Mo154/152}-ring mixed-valence oxomolybdate giant cluster were investigated by conductive atomic force microscope. Conductance were obtained by point-contact during interruption of tapping-mode feedback under controlled loading force. The current-voltage curve arise at ±0.5 V suggesting electron tunneling between electrode and {Mo154/152}-ring molecular levels.