Issue 3, 2013
From the journal:

Physical Chemistry Chemical Physics

Graphenequantum dots embedded in a hexagonal BN sheet: identical influences of zigzag/armchair edges†

Ruiqi Zhao,abc   Jinying Wang,ab   Mingmei Yang,ab   Zhongfan Liu*ab  and  Zhirong Liu*ab  

* Corresponding authors

a College of Chemistry and Molecular Engineering, Peking University, Beijing, China
E-mail: zfliu@pku.edu.cn, LiuZhiRong@pku.edu.cn

b Center for Nanochemistry, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, and Beijing National Laboratory for Molecular Sciences (BNLMS), Peking University, Beijing 100871, China

c College of Physics and Chemistry, Henan Polytechnic University, Henan 454003, China

Abstract

Various graphene quantum dots (GQDs) embedded in a hexagonal BN sheet were studied theoretically using the tight binding model. The effective mass was analyzed as a function of the distance between neighboring GQDs. It was found that the effective mass increases exponentially as the distance increases, indicating that the confined states of GQDs are well conserved in these hybrid systems. Further studies revealed that a ubiquitous gap of 0.3–3 eV exists, the size of which is mainly governed by the GQD's dimensions whereas it is insensitive to edge structures. These results show that GQDs in BN are promising candidates for optoelectronics.

Graphical abstract: Graphene quantum dots embedded in a hexagonal BN sheet: identical influences of zigzag/armchair edges

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Article information

DOI
https://doi.org/10.1039/C2CP42994B
Article type
Paper
Submitted
28 Aug 2012
Accepted
12 Nov 2012
First published
12 Nov 2012

Phys. Chem. Chem. Phys., 2013,15, 803-806

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Graphene quantum dots embedded in a hexagonal BN sheet: identical influences of zigzag/armchair edges

R. Zhao, J. Wang, M. Yang, Z. Liu and Z. Liu, Phys. Chem. Chem. Phys., 2013, 15, 803 DOI: 10.1039/C2CP42994B

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