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
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
Citations
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Interlayer Transition and Infrared Photodetection in Atomically Thin Type-II MoTe2/MoS2 van der Waals Heterostructures
Kenan Zhang,Tianning Zhang,Guanghui Cheng,Tianxin Li,Shuxia Wang,Wei Wei,Xiaohao Zhou,Weiwei Yu,Yan Sun,Peng Wang,Dong Zhang,Changgan Zeng,Xingjun Wang,Weida Hu,Hong Jin Fan,Guozhen Shen,Xin Chen,Xiangfeng Duan,Kai Chang,Kai Chang,Ning Dai,Ning Dai +21 more
TL;DR: The creation of type-II staggered band alignment in MoTe2/MoS2 van der Waals (vdW) heterostructures with strong interlayer coupling could improve the fundamental understanding of the essential physics behind vdW heterostructure and help the design of next-generation infrared optoelectronics.
Journal ArticleDOI
Graphene CVD growth on copper and nickel: role of hydrogen in kinetics and structure
TL;DR: It is shown that hydrogen acts as an inhibitor for the CH(4) dehydrogenation on copper, contributing to suppress deposition onto the copper substrate, and degrades quality of graphene.
Journal ArticleDOI
Water-based and biocompatible 2D crystal inks for all-inkjet-printed heterostructures
Daryl McManus,Sandra Vranic,Freddie Withers,Veronica Sanchez-Romaguera,Massimo Macucci,Huafeng Yang,Roberto Sorrentino,Khaled Parvez,Seok-Kyun Son,Giuseppe Iannaccone,Kostas Kostarelos,Gianluca Fiori,Cinzia Casiraghi +12 more
TL;DR: A general approach to achieve inkjet-printable, water-based, two-dimensional crystal formulations, which also provide optimal film formation for multi-stack fabrication and in vitro dose-escalation cytotoxicity assays confirm the biocompatibility of the inks, extending their possible use to biomedical applications.
Journal ArticleDOI
Synthesis of graphene-like nanosheets and their hydrogen adsorption capacity
TL;DR: In this paper, the morphology and structure of the graphene powder sample was studied using scanning electron microscopy, transmission electron microscope, X-ray diffraction and Raman spectroscopy.
Journal ArticleDOI
High-throughput production of pristine graphene in an aqueous dispersion assisted by non-ionic surfactants
L. Guardia,M.J. Fernández-Merino,Juan I. Paredes,Pablo Solís-Fernández,Silvia Villar-Rodil,Amelia Martínez-Alonso,Juan M.D. Tascón +6 more
TL;DR: In this article, the preparation of aqueous graphene dispersions by exfoliation of pristine graphite in the presence of a wide range of surfactants was reported, and the potential utility of such highly concentrated dispersions toward the low-cost, large-scale manipulation and processing of graphene was demonstrated by processing them into electrically conductive, free-standing paper-like films.
References
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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.