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Nonlinear bandgap o...
Nonlinear bandgap opening behavior of BN co-doped graphene
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Wang, Bo-Yao (författare)
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Wang, Hsiaotsu (författare)
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Chen, Ling-Yen (författare)
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visa fler...
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Hsueh, Hung-Chung (författare)
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Li, Xin (författare)
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Guo, Jinghua (författare)
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- Luo, Yi (författare)
- KTH,Teoretisk kemi och biologi
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Chiou, Jau-Wern (författare)
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Wang, Wei-Hua (författare)
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Wang, Po-Hsiang (författare)
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Chen, Kuei-Hsien (författare)
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Chen, Yen-Chih (författare)
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Chen, Li-Chyong (författare)
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Chen, Chia-Hao (författare)
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Wang, Jian (författare)
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Pong, Way-Faung (författare)
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(creator_code:org_t)
- Elsevier, 2016
- 2016
- Engelska.
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Ingår i: Carbon. - : Elsevier. - 0008-6223 .- 1873-3891. ; 107, s. 857-864
- Relaterad länk:
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http://manuscript.el...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Nyckelord
- Hexagonal Boron-Nitride
- X-Ray Spectromicroscopy
- Augmented-Wave Method
- Electronic-Structures
- Cluster-Analysis
- Nitrogen
- Gap
- Growth
- Photoluminescence
- Spectroscopy
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- art (ämneskategori)
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Carbon
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Wang, Bo-Yao
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Wang, Hsiaotsu
-
Chen, Ling-Yen
-
Hsueh, Hung-Chun ...
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Li, Xin
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Guo, Jinghua
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visa fler...
-
Luo, Yi
-
Chiou, Jau-Wern
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Wang, Wei-Hua
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Wang, Po-Hsiang
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Chen, Kuei-Hsien
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Chen, Yen-Chih
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Chen, Li-Chyong
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Chen, Chia-Hao
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Wang, Jian
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Pong, Way-Faung
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visa färre...
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Carbon
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