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
Citations
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Electric field-modulated high sensitivity and selectivity for NH3 on α-C2N2 nanosheet: Insights from DFT calculations
TL;DR: In this article, an electric field-modulated α-C2N2 of high sensitivity and selectivity toward NH3 has been studied by using the first-principle calculations.
Journal ArticleDOI
Effects of vacancies and divacancies on the failure of C3N nanosheets
TL;DR: In this paper, the effects of nanopores on the mechanical properties of C3N sheets have been evaluated using the molecular dynamics method, and the formation energy for each type has been calculated.
Journal ArticleDOI
Direct white emissive Cl-doped graphene quantum dots-based flexible film as a single luminophore for remote tunable UV-WLEDs
Xiao-Fei Wang,Xiao-Fei Wang,Gui-Gen Wang,Gui-Gen Wang,Jia-Bing Li,Zheng Liu,You-Xiao Chen,Long-Fei Liu,Jiecai Han +8 more
TL;DR: In this paper, a chlorine-doped graphene quantum dots (Cl-GQDs) were used in solid-state white-light-emitting diodes (WLEDs).
Journal ArticleDOI
Interfacial Thermal Conductance and Thermal Rectification of Hexagonal BCnN/Graphene In-Plane Heterojunctions
TL;DR: Graphene and hexagonal BCnN (n = 0, 1, 2) can easily form in-plane BCnNs/graphene heterojunctions, which exhibit many unique physical properties.
Journal ArticleDOI
C2N: A Class of Covalent Frameworks with Unique Properties.
Zhihong Tian,Zhihong Tian,Nieves López-Salas,Chuntai Liu,Tianxi Liu,Tianxi Liu,Markus Antonietti +6 more
TL;DR: A comprehensive overview on C2N is provided, starting with its preparation methods, followed by a fundamental understanding of structure–property relationships, and finally introducing its application in gas sorption and separation technologies, as supercapacitor and battery electrodes, and in catalytic and biological processes.
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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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.
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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.