Journal ArticleDOI
Modulating the electronic structures of graphene by controllable hydrogenation
TLDR
In this article, the evolution of electronic structures of hydrogenated graphene with different amount of hydrogen (H) coverage was investigated by ultraviolet photoemission spectroscopy and optical absorption spectro-spectroscopy.Abstract:
The evolution of electronic structures of hydrogenated graphene with different amount of hydrogen (H) coverage was investigated by ultraviolet photoemission spectroscopy and optical absorption spectroscopy. Raman spectroscopy and x-ray photoelectron spectroscopy were used to monitor and evaluate the H coverage. At low H coverage, the sp3 CH bonds embedded within a sp2 C matrix behave as defects in graphene and depress the delocalized π electron system. At high H coverage, two localized π electron states originating from the sp2 C clusters encircled by the sp3 CH matrix appear in the electronic band structures, and an opening of a band gap has been observed.read more
Citations
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Pyridinic N doped graphene: synthesis, electronic structure, and electrocatalytic property
Zhiqiang Luo,San Hua Lim,Zhiqun Tian,Jingzhi Shang,Linfei Lai,Brian MacDonald,Chao Fu,Zexiang Shen,Ting Yu,Ting Yu,Jianyi Lin +10 more
TL;DR: In this article, a single layer graphene was synthesized with pure pyridinic N by thermal chemical vapour deposition of hydrogen and ethylene on Cu foils in the presence of ammonia.
Journal ArticleDOI
Graphene-related nanomaterials: tuning properties by functionalization
TL;DR: The most recent progress on graphene-related nanomaterials, including doped graphene and derived graphene nanoribbons, graphene oxide, graphane, fluorographene, graphyne, graphdiyne, and porous graphene are discussed, and tuning their stability, electronic and magnetic properties by chemical functionalization is emphasized.
Journal ArticleDOI
A Direct and Polymer-Free Method for Transferring Graphene Grown by Chemical Vapor Deposition to Any Substrate
Wei-Hsiang Lin,Ting-Hui Chen,Jan-Kai Chang,Jieh-I Taur,Yuan-Yen Lo,Wei-Li Lee,Chia-Seng Chang,Wei-Bin Su,Chih-I Wu +8 more
TL;DR: A polymer-free method that can routinely transfer relatively large-area graphene to any substrate with advanced electrical properties and superior atomic and chemical structures as compared to the graphene sheets transferred with conventional polymer-assisted methods is demonstrated.
Journal ArticleDOI
Nitrogen and boron doped monolayer graphene by chemical vapor deposition using polystyrene, urea and boric acid
TL;DR: In this paper, a facile strategy to prepare nitrogen and boron doped monolayer graphene by using urea and boric acid as solid precursors was reported.
Journal ArticleDOI
Graphene nanoribbons: fabrication, properties and devices
Arlensiú Celis,Arlensiú Celis,Maya N. Nair,Amina Taleb-Ibrahimi,E. H. Conrad,Claire Berger,Claire Berger,W. A. de Heer,Antonio Tejeda,Antonio Tejeda +9 more
TL;DR: In this paper, the basic properties of Graphene nanoribbons and recent progress in fabrication processes are reviewed, focusing on the question of the electronic gap and their properties at the nanoscale.
References
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Journal ArticleDOI
Graphene: Status and Prospects
TL;DR: This review analyzes recent trends in graphene research and applications, and attempts to identify future directions in which the field is likely to develop.
Journal ArticleDOI
Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils
Xuesong Li,Weiwei Cai,Jinho An,Seyoung Kim,Junghyo Nah,Dongxing Yang,Richard D. Piner,Aruna Velamakanni,Inhwa Jung,Emanuel Tutuc,Sanjay K. Banerjee,Luigi Colombo,Rodney S. Ruoff +12 more
TL;DR: It is shown that graphene grows in a self-limiting way on copper films as large-area sheets (one square centimeter) from methane through a chemical vapor deposition process, and graphene film transfer processes to arbitrary substrates showed electron mobilities as high as 4050 square centimeters per volt per second at room temperature.
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Fine Structure Constant Defines Visual Transparency of Graphene
Rahul R. Nair,Peter Blake,Peter Blake,Alexander N. Grigorenko,K. S. Novoselov,Timothy J. Booth,Timothy J. Booth,Tobias Stauber,Tobias Stauber,Nuno M. R. Peres,Nuno M. R. Peres,A. K. Geim +11 more
TL;DR: It is shown that the opacity of suspended graphene is defined solely by the fine structure constant, a = e2/hc � 1/137 (where c is the speed of light), the parameter that describes coupling between light and relativistic electrons and that is traditionally associated with quantum electrodynamics rather than materials science.
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Raman spectroscopy in graphene
TL;DR: In this article, the authors discuss the first-order and double resonance Raman scattering mechanisms in graphene, which give rise to the most prominent Raman features and give special emphasis to the possibility of using Raman spectroscopy to distinguish a monolayer from few-layer graphene stacked in the Bernal configuration.
Journal ArticleDOI
Control of graphene's properties by reversible hydrogenation: Evidence for graphane
D. C. Elias,Rahul R. Nair,T. M. G. Mohiuddin,Sergey V. Morozov,Peter Blake,Matthew P. Halsall,Andrea C. Ferrari,Danil W. Boukhvalov,Mikhail I. Katsnelson,A. K. Geim,Kostya S. Novoselov +10 more
TL;DR: This work illustrates the concept of graphene as a robust atomic-scale scaffold on the basis of which new two-dimensional crystals with designed electronic and other properties can be created by attaching other atoms and molecules.