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STM TIP-CURRENT-INDUCED POLYMERIZATION OF C60, Ce2@C80 AND Lu2@C76
HISANORI SHINOHARA,KAZUNORI OHASHI,NOBUYUKI FUKUI,MASAHIRO AKACHI,TAKAO AKACHI,HISASHI UMEMOTO,YASUHIRO ITO,TOSHIKI SUGAI,RYO KITAURA 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2009 NANO Vol.4 No.5
Polymerization of C60, Ce2@C80, and Lu2@C76 metallofullerenes induced by electron injection from a scanning tunneling microscope (STM) tip has been studied. C60 polymerization has been observed only with C60 multilayer on Au(111) and not with C60 monolayer on Au(111). The Ce2@C80 metallofullerene on Si(111)-7 × 7 also polymerizes by electron injection but has less polymerization reactivity than C60. Interestingly, the Lu2@C76 metallofullerene on Si(111)-7 × 7 does not show any polymerization. Based on these STM observations on the tip-induced polymerization, the direction of the bond formation and the dependence of reactivity on the kind of fullerenes are discussed.