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Nonlinear bandgap o...
Nonlinear bandgap opening behavior of BN co-doped graphene
- Article/chapterEnglish2016
Publisher, publication year, extent ...
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Elsevier,2016
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-192381
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192381URI
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https://doi.org/10.1016/j.carbon.2016.06.091DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20160913
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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 and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Wang, Hsiaotsu
(author)
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Chen, Ling-Yen
(author)
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Hsueh, Hung-Chung
(author)
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Li, Xin
(author)
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Guo, Jinghua
(author)
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Luo, YiKTH,Teoretisk kemi och biologi(Swepub:kth)u126eitw
(author)
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Chiou, Jau-Wern
(author)
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Wang, Wei-Hua
(author)
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Wang, Po-Hsiang
(author)
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Chen, Kuei-Hsien
(author)
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Chen, Yen-Chih
(author)
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Chen, Li-Chyong
(author)
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Chen, Chia-Hao
(author)
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Wang, Jian
(author)
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Pong, Way-Faung
(author)
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KTHTeoretisk kemi och biologi
(creator_code:org_t)
Related titles
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In:Carbon: Elsevier107, s. 857-8640008-62231873-3891
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Carbon
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Wang, Bo-Yao
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Wang, Hsiaotsu
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Chen, Ling-Yen
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Hsueh, Hung-Chun ...
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Li, Xin
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Guo, Jinghua
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Luo, Yi
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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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- NATURAL SCIENCES
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NATURAL SCIENCES
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Carbon
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Royal Institute of Technology