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
Reads0
Chats0
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
More filters
Journal ArticleDOI
Evolution and Synthesis of Carbon Dots: From Carbon Dots to Carbonized Polymer Dots
TL;DR: CPDs are revealed as an emerging class of CDs with distinctive polymer/carbon hybrid structures and properties, and critical insights into facilitating their potential in various application fields are proposed.
Journal ArticleDOI
Molecular engineering of polymeric carbon nitride: advancing applications from photocatalysis to biosensing and more
TL;DR: This review summarizes and highlights a panorama of the latest advancements related to the design and construction of the molecular structure of CN, such as by doping and copolymerization, engineering of the polymerization degree, coordination interaction, covalent and noncovalent functionalization, and modulation of intralayer hydrogen bonding.
Journal ArticleDOI
Interface-Assisted Synthesis of 2D Materials: Trend and Challenges
TL;DR: The state-of-the-art progress on interfacial synthesis strategies and address their advancements in the structural, morphological, and crystalline control by the direction of the arrangement of the molecules or precursors at a confined 2D space are summarized.
Journal ArticleDOI
The Computational 2D Materials Database: high-throughput modeling and discovery of atomically thin crystals
Sten Haastrup,Mikkel Strange,Mohnish Pandey,Thorsten Deilmann,Per Simmendefeldt Schmidt,N. F. Hinsche,Morten Niklas Gjerding,Daniele Torelli,Peter Mahler Larsen,Anders C. Riis-Jensen,Jakob Gath,Karsten Wedel Jacobsen,Jens Jørgen Mortensen,Thomas Olsen,Kristian Sommer Thygesen +14 more
TL;DR: The Computational 2D Materials Database (C2DB) as discussed by the authors is a large-scale database of 2D materials and van der Waals heterostructures, including tens of thousands of materials.
Journal ArticleDOI
Full-color fluorescent carbon quantum dots
Liang Wang,Liang Wang,Weitao Li,Luqiao Yin,Yijian Liu,Huazhang Guo,Jiawei Lai,Yu Han,Gao Li,Ming Li,Jianhua Zhang,Robert Vajtai,Pulickel M. Ajayan,Minghong Wu +13 more
TL;DR: The universal electron-donating/withdrawing group engineering approach for synthesizing tunable emissive CQDs will facilitate the progress of carbon-based luminescent materials for manufacturing forward-looking films and devices.
References
More filters
Book
Lecture notes on electron correlation and magnetism
TL;DR: Atoms, ions, and molecules crystal field theory Mott transition and Hubbard model Mott insulators Heisenberg magnets itinerant electron magnetism ferromagnetism in Hubbard models the Gutzwiller variational method.
Journal ArticleDOI
Fast growth of inch-sized single-crystalline graphene from a controlled single nucleus on Cu–Ni alloys
Tianru Wu,Xuefu Zhang,Qinghong Yuan,Jiachen Xue,Guangyuan Lu,Zhihong Liu,Wang Huishan,Haomin Wang,Feng Ding,Qingkai Yu,Xiaoming Xie,Xiaoming Xie,Mianheng Jiang,Mianheng Jiang +13 more
TL;DR: An efficient strategy for achieving large-area single-crystalline graphene by letting a single nucleus evolve into a monolayer at a fast rate is demonstrated by locally feeding carbon precursors to a desired position of a substrate composed of an optimized Cu-Ni alloy.
Journal ArticleDOI
A review of the preparation of carbon nitride films
Stephen Muhl,Juan Manuel Mendez +1 more
TL;DR: A review of the methods used, and the results obtained, by a variety of groups in their attempts to prepare carbon nitride films is presented in this paper, with a somewhat speculative set of conclusions.
Journal ArticleDOI
Novel Magnetic Properties of Graphene: Presence of Both Ferromagnetic and Antiferromagnetic Features and Other Aspects
TL;DR: In this paper, the magnetic properties of graphenes were investigated and it was shown that dominant ferromagnetic interaction coexist along with antiferromagnetic interactions in all of the samples, somewhat like in frustrated or phase separated systems.
Journal ArticleDOI
Nonvolatile Ferroelectric Memory Circuit Using Black Phosphorus Nanosheet-Based Field-Effect Transistors with P(VDF-TrFE) Polymer.
Young Tack Lee,Hyeokjae Kwon,Jin Sung Kim,Hong Hee Kim,Yun Jae Lee,Jung Ah Lim,Yong-Won Song,Yeonjin Yi,Won Kook Choi,Won Kook Choi,Do Kyung Hwang,Do Kyung Hwang,Seongil Im +12 more
TL;DR: A few-layered BP-based nonvolatile memory transistor with a poly(vinylidenefluoride-trifluoroethylene) (P(VDF-TrFE) ferroelectric top gate insulator is demonstrated and shows only p-type characteristics, as well as the highest linear mobility value.