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首页> 外文期刊>Physica status solidi, B. Basic research >Photoemission study of electronic structures of fullerene and metallofullerene peapods
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Photoemission study of electronic structures of fullerene and metallofullerene peapods

机译：富勒烯和金属富勒烯豌豆电子结构的光发射研究

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We have investigated the electronic structures of single-wall carbon nanotubes (SWCNTs) encapsulating C-70 fullerene and metallofullerenes M@C-82 (M = La, Gd, Dy), C-70 peapods (C-70@SWCNT) and metaltofullerene peapods (M@C-82@SWCNT), using photoemission spectroscopy. The photoemission spectra of C-70 and M@C-82 peas are obtained by subtracting the spectrum of pristine SWCNTs from those of the corresponding peapods. The electronic structure of the C-70 peas is similar to that of the C-70 film. For the M@C-82 peapods, on the other hand, the electronic structures of the M@C-82 peas are different. For the La@C-82 peapods, the singly occupied molecular orbital (SOMO) for the La@C-82 peas is located nearer to the Fermi level when compared with that in the La@C-82 film. For the DY@C-82 peapods, the effective Dy valence is estimated to be +2.9. This result demonstrates that effective charges move back from the C82 cage to Dy following encapsulation of DY@C-82 peas in the SWCNTs because of the strong hybridization interaction between Dy 4f and C 2p electrons, taking into account the Dy valence of +3 in the Dy@C-82 film. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
机译：我们研究了封装C-70富勒烯和金属富勒烯M @ C-82（M = La，Gd，Dy），C-70豌豆（C-70 @ SWCNT）和金属富勒烯的单壁碳纳米管（SWCNT）的电子结构豌豆（M @ C-82 @ SWCNT），使用光发射光谱法。通过从相应的豌豆脚的光谱中减去原始SWCNT的光谱，可以获得C-70和M @ C-82豌豆的光发射光谱。 C-70豌豆的电子结构类似于C-70薄膜的电子结构。另一方面，对于M @ C-82豌豆脚，M @ C-82豌豆的电子结构是不同的。对于La @ C-82豌豆脚，与La @ C-82胶片相比，La @ C-82豌豆的单占据分子轨道（SOMO）靠​​近费米能级。对于DY @ C-82豌豆，有效Dy价估计为+2.9。该结果表明，由于Dy 4f和C 2p电子之间的强杂化相互作用，考虑到DY中的+3价，有效的电荷从DY @ C-82豌豆封装到SWCNT中后，从C82笼移回到Dy。 Dy @ C-82电影。 （C）2008 WILEY-VCH Verlag GmbH＆Co.KGaA，Weinheim

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