Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7999833 | Journal of Alloys and Compounds | 2015 | 6 Pages |
Abstract
Using the ab initio density-functional theory method, we calculated the size effect and edge shape effect on UV-visible light absorption of different shapes of graphene quantum dots (GQDs). There are two interesting findings in this study. First, the edge shape effect increase with increasing the size of square GQDs. Second, the Seam atoms, located at the boundary between zigzag and armchair edges, hardly contribute to the strongest visible light absorption. This refinement of the edge-shape effect can be found in rectangular, triangular and hexagonal GQDs. This new finding will be useful in applications of GQDs in the visible light absorption nanodevices.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Ruiqiang Zhang, Shifei Qi, Jianfeng Jia, Bryna Torre, Hao Zeng, Haishun Wu, Xiaohong Xu,