Raman spectrum of graphene and graphene layers.
Andrea C. Ferrari,Jannik C. Meyer,Vittorio Scardaci,Cinzia Casiraghi,Michele Lazzeri,Francesco Mauri,S. Piscanec,Da Jiang,K. S. Novoselov,S. Roth,A. K. Geim +10 more
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TLDR
This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.Abstract:
Graphene is the two-dimensional building block for carbon allotropes of every other dimensionality We show that its electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers The D peak second order changes in shape, width, and position for an increasing number of layers, reflecting the change in the electron bands via a double resonant Raman process The G peak slightly down-shifts This allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research arearead more
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Three-dimensional graphene foam as a biocompatible and conductive scaffold for neural stem cells
Ning Li,Qi Zhang,Song Gao,Qin Song,Rong Huang,Long Wang,Liwei Liu,Jianwu Dai,Mingliang Tang,Guosheng Cheng +9 more
TL;DR: Graphene foam, a 3D porous structure, is used as a novel scaffold for NSCs in vitro and phenotypic analysis indicated that 3D-GFs can enhance the NSC differentiation towards astrocytes and especially neurons.
Journal ArticleDOI
Graphene as a Long-Term Metal Oxidation Barrier: Worse Than Nothing
Maria Schriver,William Regan,William Regan,Will Gannett,Will Gannett,Anna Zaniewski,Anna Zaniewski,Michael F. Crommie,Michael F. Crommie,Alex Zettl,Alex Zettl +10 more
TL;DR: This work reveals that although graphene indeed offers effective short-term oxidation protection, over long time scales it promotes more extensive wet corrosion than that seen for an initially bare, unprotected Cu surface.
Journal ArticleDOI
High-resolution scanning tunneling microscopy imaging of mesoscopic graphene sheets on an insulating surface
Elena Stolyarova,Kwang Taeg Rim,Sunmin Ryu,Janina Maultzsch,Philip Kim,Louis E. Brus,Tony F. Heinz,Mark S. Hybertsen,George W. Flynn +8 more
TL;DR: Scan scanning tunneling microscopy (STM) images of single-layer graphene crystals examined under ultrahigh vacuum conditions display the honeycomb structure expected for the full hexagonal symmetry of an isolated graphene monolayer.
Journal ArticleDOI
The shear mode of multilayer graphene
Ping-Heng Tan,W. P. Han,Weijie Zhao,Zhenhua Wu,Kai Chang,H. Wang,Y. F. Wang,Nicola Bonini,Nicola Marzari,Nicola M. Pugno,Nicola M. Pugno,Giorgio Savini,Antonio Lombardo,Andrea C. Ferrari +13 more
TL;DR: The interlayer shear mode of FLGs, ranging from bilayer graphene (BLG) to bulk graphite, is uncovered, and it is suggested that the corresponding Raman peak measures the interlayer coupling.
Journal ArticleDOI
Nitrogen-doped graphene: beyond single substitution and enhanced molecular sensing
Ruitao Lv,Qing Li,Andrés R. Botello-Méndez,Takuya Hayashi,Bei Wang,Ayse Berkdemir,Qingzhen Hao,Ana Laura Elías,Rodolfo Cruz-Silva,Humberto R. Gutierrez,Yoong Ahm Kim,Hiroyuki Muramatsu,Jun Zhu,Morinobu Endo,Humberto Terrones,Humberto Terrones,Jean-Christophe Charlier,Minghu Pan,Mauricio Terrones,Mauricio Terrones +19 more
TL;DR: In this article, the synthesis of large-area, highly-crystalline monolayer N-doped graphene (NG) sheets via atmospheric-pressure chemical vapor deposition, yielding a unique Ndoping site composed of two quasi-adjacent substitutional nitrogen atoms within the same graphene sub-lattice (N2AA).
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疟原虫var基因转换速率变化导致抗原变异[英]/Paul H, Robert P, Christodoulou Z, et al//Proc Natl Acad Sci U S A
TL;DR: PfPMP1)与感染红细胞、树突状组胞以及胎盘的单个或多个受体作用,在黏附及免疫逃避中起关键的作�ly.