AN ORIENTED CLUSTER FORMATION OF ENDOHEDRAL Y-AT-C-82 METALLOFULLERENES ON CLEAN SURFACES

被引：47

作者：

SHINOHARA, H ^{[1
]}

INAKUMA, M ^{[1
]}

KISHIDA, M ^{[1
]}

YAMAZAKI, S ^{[1
]}

HASHIZUME, T ^{[1
]}

SAKURAI, T ^{[1
]}

机构：

[1] TOHOKU UNIV,INST MAT RES,SENDAI,MIYAGI 980,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 38期

关键词：

D O I：

10.1021/j100038a004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An oriented head-to-tail cluster formation of an endohedral yttrium metallofullerene, Y @ C-82, On a Cu(111)1 x 1 clean surface has been observed directly by the use of a scanning tunneling microscopy (STM) under ultrahigh-vacuum conditions. The STM observation reveals that the Y @ C-82 molecules preferentially form dimers and one-dimensional clusters at the step edge of the Cu(111) surface. The observed intermolecular distance (11.2 +/- 0.5 Angstrom) is smaller than that of the simple Y @ C-82- - -Y @ C-82 van der Waals distance (11.4 Angstrom), indicating the presence of a strong interfullerene interaction. The STM results suggest the presence of strong dipole-dipole and charge-transfer interactions among Y @ C-82 fullerenes. Such a molecule has a great similarity to the ''superatom'' features proposed theoretically in a semiconductor heterostructure.

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页码：13769 / 13771

页数：3

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