Substituent-Dependent Ordering of Adlayer Structures of Fullerene Derivatives Adsorbed on Au(111): A Scanning Tunneling Microscopy Study.
Substituent-Dependent Ordering of Adlayer Structures of Fullerene Derivatives Adsorbed on Au(111): A Scanning Tunneling Microscopy Study.
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DOI：
10.1021/jp9114173
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发表时间：
2010-02
影响因子：
3.7
通讯作者：
Ting Chen;Gebo Pan;Hui-Juan Yan;L. Wan;Y. Matsuo;E. Nakamura
中科院分区：
文献类型：
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作者：
Ting Chen;Gebo Pan;Hui-Juan Yan;L. Wan;Y. Matsuo;E. Nakamura
采用扫描隧道显微镜（STM）和循环伏安法研究了Re（C60 Me 5）（CO）3、Ru（C60 Ph 5）Cp、C60（C6 H4 C6 H4 −COOH）5 Me和C60（C6 H4 −CC− SiMe 2C 12 H25）5 Me四种富勒烯衍生物在Au（111）表面的吸附.高分辨STM图像显示，Re（C60 Me 5）（CO）3形成了有序的（2 <$3 × 2 <$3）R30°结构。与C60在Au（111）上的结构不同，在C60上没有发现甲基和Re（CO）3基团的“同相”结构。随着取代基尺寸的增加，Ru（C60 Ph 5）Cp和C60（C6 H4 C6 H4 −COOH）5 Me的吸附层呈现无序状态。然而，单个分子可以在STM图像中区分，这表明这两个分子与Au（111）表面强烈相互作用。当取代基尺寸进一步增大时，形成C60（C6 H4-CC-SiMe 2C 12 H25）5 Me的多层结构。这是因为本体溶液中的分子聚集，其在非常低的浓度下发生。这些结果表明，富里酸酯的结构与富里酸酯的结构有关。
The adsorption of four fullerene derivatives, including Re(C60Me5)(CO)3, Ru(C60Ph5)Cp, C60(C6H4C6H4−COOH)5Me, and C60(C6H4−CC−SiMe2C12H25)5Me, on a Au(111) surface has been investigated by scanning tunneling microscopy (STM) and cyclic voltammetry. High-resolution STM images reveal that Re(C60Me5)(CO)3 forms a well-ordered (2√3 × 2√3)R30° structure. Different from C60 on Au(111), the so-called “in-phase” structure is not found with the attachment of methyl and Re(CO)3 groups. With the increase of substituent size, disordered adlayers have been observed for Ru(C60Ph5)Cp and C60(C6H4C6H4−COOH)5Me. However, the individual molecules could be distinguished in STM images, suggesting that the two molecules interact strongly with the Au(111) surface. When the substituent size is further increased, a multilayered structure is formed for C60(C6H4−CC−SiMe2C12H25)5Me. This is because of molecular aggregation in the bulk solution, which occurs at very low concentration. These results indicate that the structures of fu...