Journal ArticleDOI
C3N—A 2D Crystalline, Hole-Free, Tunable-Narrow-Bandgap Semiconductor with Ferromagnetic Properties
Siwei Yang,Wei Li,Wei Li,Cai-Chao Ye,Gang Wang,He Tian,Chong Zhu,Peng He,Guqiao Ding,Xiaoming Xie,Xiaoming Xie,Yang Liu,Yeshayahu Lifshitz,Yeshayahu Lifshitz,Shuit-Tong Lee,Zhenhui Kang,Mianheng Jiang,Mianheng Jiang +17 more
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TLDR
Surprisingly, C3 N exhibits a ferromagnetic order at low temperatures (<96 K) when doped with hydrogen, which opens the door for both fundamental basic research and possible future applications.Abstract:
Graphene has initiated intensive research efforts on 2D crystalline materials due to its extraordinary set of properties and the resulting host of possible applications. Here the authors report on the controllable large-scale synthesis of C3 N, a 2D crystalline, hole-free extension of graphene, its structural characterization, and some of its unique properties. C3 N is fabricated by polymerization of 2,3-diaminophenazine. It consists of a 2D honeycomb lattice with a homogeneous distribution of nitrogen atoms, where both N and C atoms show a D6h -symmetry. C3 N is a semiconductor with an indirect bandgap of 0.39 eV that can be tuned to cover the entire visible range by fabrication of quantum dots with different diameters. Back-gated field-effect transistors made of single-layer C3 N display an on-off current ratio reaching 5.5 × 1010 . Surprisingly, C3 N exhibits a ferromagnetic order at low temperatures (<96 K) when doped with hydrogen. This new member of the graphene family opens the door for both fundamental basic research and possible future applications.read more
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Two-dimensional phosphorene/C 3 N p-n heterostructure: Effect of contact type on electronic and optical properties
TL;DR: In this paper, a two-dimensional vdW-contact phosphorene (BP)/C3N p-n HTS was constructed, and the authors analyzed its electronic and optical properties in comparison with the inplane-jointed ones.
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Crown ether-like structure in graphene quantum dots: Ultra-sensitive photoluminescence sensor for Ca2+ in vitro
TL;DR: In this article, a crown ether-like structure was introduced in graphene quantum dots (C-GQDs) via the hydrothermal treatment of alizarin, and the authors showed that the strong coordination of crown etherlike structure in GQDs' lattice showed a much lower detection limit to Ca2+ (2 pM) than that of surface modified GQD (100 pM).
Journal ArticleDOI
Tuning electronic properties of MSb (M = C, Si ,Ge and Sn) monolayers by strain engineering
TL;DR: In this article, the effects of biaxial strain on the electronic properties of MSb (M = C, Si, Ge, and Sn) monolayers are investigated.
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Surprisingly good thermoelectric performance of monolayer C3N.
TL;DR: In this paper, the structural, electronic, and thermoelectric transport properties of monolayer C3N were investigated, and it was found that the system is both dynamically and thermally stable even at high temperature.
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Assessing mechanical properties of single-layer B-doped C3N and N-doped BC3 nanosheets and their hybrid
TL;DR: In this paper, the authors analyzed the mechanical properties of single-layer C3N doped with boron (B) atoms and BC3 Doped with nitrogen (N) atoms, as well as hybrid c3N-BC3 nanosheets intraplate by forming covalent bonds using molecular dynamics simulation.
References
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Electric Field Effect in Atomically Thin Carbon Films
Kostya S. Novoselov,Andre K. Geim,Sergey V. Morozov,Da Jiang,Y. Zhang,S. V. Dubonos,Irina V. Grigorieva,A. A. Firsov +7 more
TL;DR: Monocrystalline graphitic films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands and they exhibit a strong ambipolar electric field effect.
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The rise of graphene
TL;DR: Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be mimicked and tested in table-top experiments.
Journal ArticleDOI
The electronic properties of graphene
TL;DR: In this paper, the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations, are discussed.
Journal ArticleDOI
A metal-free polymeric photocatalyst for hydrogen production from water under visible light
Xinchen Wang,Kazuhiko Maeda,Arne Thomas,Kazuhiro Takanabe,Gang Xin,Johan M. Carlsson,Kazunari Domen,Markus Antonietti +7 more
TL;DR: It is shown that an abundant material, polymeric carbon nitride, can produce hydrogen from water under visible-light irradiation in the presence of a sacrificial donor.
Journal ArticleDOI
Metal-free efficient photocatalyst for stable visible water splitting via a two-electron pathway
Juan Liu,Yang Liu,Naiyun Liu,Yuzhi Han,Xing Zhang,Hui Huang,Yeshayahu Lifshitz,Yeshayahu Lifshitz,Shuit-Tong Lee,Jun Zhong,Zhenhui Kang +10 more
TL;DR: The design and fabrication of a metal-free carbon nanodot–carbon nitride (C3N4) nanocomposite is reported and its impressive performance for photocatalytic solar water splitting is demonstrated.