Scanning tunneling microscopy studies of C60 monolayers on Au(111)
Scanning tunneling microscopy studies of C60 monolayers on Au(111)
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DOI：
10.1103/physrevb.80.235434
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发表时间：
2009-12-01
影响因子：
3.7
通讯作者：
Castell, M. R.
中科院分区：
文献类型：
--
作者：
Gardener, J. A.;Briggs, G. A. D.;Castell, M. R.
本文报道了用扫描隧道显微镜研究了C-60在Au（111）表面的紧密堆积单层膜沉积后的退火过程。在这些结构中，C-60分子呈现出离散的明亮或暗淡。暗淡C-60在紧密堆积结构中的排列取决于覆盖层相对于Au（111）表面的取向。明亮和暗淡的C-60之间的表观高度差随着施加的样品偏压而变化，并且单个C-60分子可以在室温下从明亮切换到暗淡，反之亦然。我们提出，暗淡的C-60产生的C-60-Au界面的重组，形成纳米孔，这有利于电荷转移从基板的第一层富勒烯分子。
We report a scanning tunneling microscopy study of close packed C-60 monolayers on Au(111) upon post-deposition annealing. Within these structures the C-60 molecules appear discretely bright or dim. The arrangements of dim C-60 within the close packed structures are dependent on the orientation of the overlayer with respect to the Au(111) surface. The apparent height difference between the bright and dim C-60 varies with applied sample bias, and the individual C-60 molecules can switch from bright-to-dim or vice versa at room temperature. We propose that the dim C-60 arise from a restructuring of the C-60-Au interface to form nanopits, which facilitate charge transfer from the substrate to the first layer fullerene molecules.