| Summary: | 碩士 === 國立臺灣師範大學 === 化學系 === 103 === Bis(2,2'-bipyridine)-5-amino-1,10-phenanthroline ruthenium(II) (Ru(bpy)2(NH2-phen)2+) is an MLCT complex, possessing a long-lived triplet state in water and a structure analogous to Ru(bpy)32+. When Ru(bpy)2(NH2-phen)2+ was subjected to diazotization in the presence of carbon nanotubes (CNTs), it formed nanodots on the CNTs, rendering the resulting tubes (Ru@CNT) capable of transducing photo stimuli (473 nm) into electricity and magnetism at ambient conditions. The increased functionality was highly reproducible, confirmed by the conductive-mode AFM, vibrating sample magnetometry (VSM), and AC susceptibility analysis. Local magnetism probing of the Ru@CNT with the magnetic-mode AFM techniques (MFM) indicated that the magnetism was originating from the photoexcited nanodots. The resulting phase shift behaved as a function of the luminous power and the voltage (Vb) of the electrical bias applied to the Ru@CNT. The Vb dependence deviated from the expected quadratic correlation, suggesting that the formation of the triplet state at the nanodots could be a limiting factor for the photomagnetism. Nevertheless, the Ru@CNT tubes showed mobility toward an external magnet when exposed to visible light on water. The Ru@CNT is thus shown as a multifunctional material that might be useful in spintronics.
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