WFRF:(Chiou Jau Wern)
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Nonlinear bandgap opening behavior of BN co-doped graphene
- Wang, Bo-Yao (author)
- Wang, Hsiaotsu (author)
- Chen, Ling-Yen (author)
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- Hsueh, Hung-Chung (author)
- Li, Xin (author)
- Guo, Jinghua (author)
- Chiou, Jau-Wern (author)
- Wang, Wei-Hua (author)
- Wang, Po-Hsiang (author)
- Chen, Kuei-Hsien (author)
- Chen, Yen-Chih (author)
- Chen, Li-Chyong (author)
- Chen, Chia-Hao (author)
- Wang, Jian (author)
- Pong, Way-Faung (author)
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- (creator_code:org_t)
- Elsevier, 2016
- 2016
- English.
- In: Carbon. - : Elsevier. - 0008-6223 .- 1873-3891. ; 107, s. 857-864
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- We have demonstrated a nonlinear behavior for the bandgap opening of doped graphene by controlling the concentration of B and N co-dopants. X-ray absorption and emission spectra reveal that the bandgap increases from 0 to 0.6 eV as the concentration of BN dopants is increased from 0 to 6%, while the bandgap closes when the doping concentration becomes 56%. This nonlinear behavior of bandgap opening of the BN-doped graphene depending on the BN concentrations is consistent with the valenceband photoemission spectroscopic measurements. The spatially resolved B, N and C K-edge scanning transmission x-ray microscopy and their x-ray absorption near- edge structure spectra all support the scenario of the development of h-BN-like domains at high concentrations of BN. Ab initio calculation, by taking into account of the strong correlation between the bandgap and the geometry/concentration of the dopant, has been performed with various BN-dopant nano-domains embedded in the graphene monolayer to verify the unique bandgap behavior. Based on the experimental measurements and ab initio calculation, we propose the progressive formation of a phase-separated zigzag-edged BN domain from BN quantum dots with increasing BN-dopant concentration to explain the extraordinary nonlinear behavior of bandgap opening of BN-doped graphene sheets. This study reveals a new way to engineer the bandgap of low-dimensional systems.
Subject headings
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Keyword
- Hexagonal Boron-Nitride
- X-Ray Spectromicroscopy
- Augmented-Wave Method
- Electronic-Structures
- Cluster-Analysis
- Nitrogen
- Gap
- Growth
- Photoluminescence
- Spectroscopy
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
- Wang, Bo-Yao
- Wang, Hsiaotsu
- Chen, Ling-Yen
- Hsueh, Hung-Chun ...
- Li, Xin
- Guo, Jinghua
- show more...
- Luo, Yi
- Chiou, Jau-Wern
- Wang, Wei-Hua
- Wang, Po-Hsiang
- Chen, Kuei-Hsien
- Chen, Yen-Chih
- Chen, Li-Chyong
- Chen, Chia-Hao
- Wang, Jian
- Pong, Way-Faung
- show less...
- About the subject
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- NATURAL SCIENCES
- NATURAL SCIENCES
- and Chemical Science ...
- and Other Chemistry ...
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- Carbon
- By the university
- Royal Institute of Technology
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