Effect of Fluorination on Nano-Sized π-Electron Systems : Condensed Matter: Electronic Properties, etc.

概要

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The electronic structure of networked nano-graphites is investigated in relation to the effects of fluorine-introduced sp^3-defects on the nano-sized π-electron system. In the low fluorine concentration region, the shrinkage of the π-conjugated system due to introduced sp^3-defects reduces the orbital diamagnetism and modifies the electron hopping process between nano-graphite domains, and the edge-inherited non-bonding π-electrons having localized spins, which give a unique feature to nano-sized π-electron system, are seriously affected by the attack of fluorine atoms to edge carbon sites. In the intermediate fluorine concentration region, the spin density is enhanced by dangling bond spins generated by the local destruction of the π-conjugated system at interior carbon sites. The hyperflne-broadening of the linewidth and the reduced spin-lattice relaxation rate in ESR spectra suggest the isolated nature of the fluorine-induced localized spins in contrast to the edge-inherited spins.
社団法人日本物理学会の論文
2001-01-15