Epitaxial growth of C60 on Ag(110) studied by scanning tunneling microscopy and tunneling spectroscopy.
Epitaxial growth of C60 on Ag(110) studied by scanning tunneling microscopy and tunneling spectroscopy.
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通过扫描隧道显微镜和隧道光谱研究 C60 在 Ag(110) 上的外延生长。
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
Schlittler
中科院分区：
文献类型：
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作者：
David;Gimzewski;Purdie;Reihl;Schlittler
使用扫描隧道显微镜，探索了 ${\mathrm{C}}_{60}$ 在 Ag(110) 上的生长。基底影响富勒烯分子紧密堆积的自然倾向，并形成具有双重旋转对称性的覆盖层系统：Ag(110)c(4\ifmmode\times\else\texttimes\fi{}4)${\mathrm{C}}_{60}$。这代表了 ${\mathrm{C}}_{60}$ 分子的扭曲密堆积构型，其中在散装 ${\mathrm{C}}_{60}$ 中观察到的最近邻距离保持不变。最初的岛状生长发生在远离基底台阶边缘的阶地位置上，随着富勒烯覆盖度的增加而聚集。在单层覆盖之上，${\mathrm{C}}_{60}$外延生长，保持双重旋转对称。隧道光谱用于探索单层和多层电子结构之间的差异。
Using a scanning tunneling microscope, the growth of ${\mathrm{C}}_{60}$ on Ag(110) is explored. The substrate influences the natural tendency of the fullerene molecules to pack closely and an overlayer system with twofold rotational symmetry is formed: Ag(110)c(4\ifmmode\times\else\texttimes\fi{}4)${\mathrm{C}}_{60}$. This represents a distorted close-packed configuration for the ${\mathrm{C}}_{60}$ molecules, where the nearest-neighbor distance observed in bulk ${\mathrm{C}}_{60}$ is maintained. Initial island growth occurs on terrace sites away from substrate step edges, which bunch with increasing fullerene coverage. Above monolayer coverage, ${\mathrm{C}}_{60}$ grows epitaxially, maintaining twofold rotational symmetry. Tunneling spectroscopy is used to explore differences between the electronic structure in the monolayer and multilayer regimes.