| Budget Amount *help |
¥45,500,000 (Direct Cost: ¥35,000,000、Indirect Cost: ¥10,500,000)
Fiscal Year 2009: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Fiscal Year 2008: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2007: ¥28,470,000 (Direct Cost: ¥21,900,000、Indirect Cost: ¥6,570,000)
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| Research Abstract |
When the small Au nanoparticles are used as single-electron islands for single-electron devices operated at room temperature, the tunneling resistance of organic ligands should be low as well as the quantum resistance. We developed a facile method to control the size of Au nanopaticles even by using hexanethiol with the tunneling resistance of～MΩ. For further reduction of the tunneling resistance, various macrocyclic π-conjugated ligands were adsorbed on the Au nanoparticles in a face-coordination fashion. Very interestingly, we found quite unique optical properties as well as drastic reduction of the tunneling resistance due to the electronic interaction beween the π-orbitals and Au orbitals. We also succeeded in the large-scale synthesis of Au_<25> clusters. On the other hand, small Au nanoparticles were found to exhibit single-electron transport property and Coulomb blockade at room temperature.
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