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Orientational Epitaxy of van der Waals Molecular Heterostructures
Nano Letters ( IF 9.6 ) Pub Date : 2018-07-12 00:00:00 , DOI: 10.1021/acs.nanolett.8b02238
Lu’an Guo 1, 2 , Yitao Wang 2 , Dogan Kaya 3 , Richard E Palmer 4 , Guangde Chen 1 , Quanmin Guo 2
Affiliation  

The shape of individual building blocks is an important parameter in bottom-up self-assembly of nanostructured materials. A simple shape change from sphere to spheroid can significantly affect the assembly process due to the modification to the orientational degrees of freedom. When a layer of spheres is placed upon a layer of spheroids, the strain at the interface can be minimized by the spheroid taking a special orientation. C70 fullerenes represent the smallest spheroids, and their interaction with a sphere-like C60 is investigated. We find that the orientation of the C70 within a close-packed C70 layer can be steered by contacting a layer of C60. This orientational steering phenomenon is potentially useful for epitaxial growth of multilayer van der Waals molecular heterostructures.

中文翻译:

范德华分子异质结构的取向外延

各个构造块的形状是纳米结构材料自下而上自组装的重要参数。由于修改了方向自由度,从球体到球体的简单形状变化会极大地影响组装过程。当将一层球体放置在一层球体上时,通过使球体采取特殊的取向,可以最大程度地减小界面处的应变。C 70富勒烯代表最小的球体,并研究了它们与球形C 60的相互作用。我们发现,紧密包装的C 70层中C 70的取向可以通过接触C 60层来控制。这种定向操纵现象可能对多层范德华分子异质结构的外延生长有用。
更新日期:2018-07-12
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