期刊
NANO LETTERS
卷 11, 期 4, 页码 1524-1529出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl200298c
关键词
Alignment; quantum dots; graphene; anisotropy; nanocrystals; Langmuir films
类别
资金
- National Science Foundation
- ACS Petroleum Research Fund
- Indiana University
Controlling the orientation of nanostructures with anisotropic shapes is essential for taking advantage of their anisotropic electrical, optical, and transport properties in electro-optical devices. For large-area alignment of nanocrystals, so far orientations are mostly induced and controlled by external physical parameters such as applied fields or changes in concentration. Herein we report on assemblies of colloidal graphene quantum dots, a new type of disk shaped nanostructures, on polar surfaces and the control of their orientations. We show that the orientations of the graphene quantum dots can be determined, either in or out with the substrate, by chemical functionalization that introduces orientation-dependent interactions between the quantum dots and the surfaces.
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