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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Opening an Electrical Band Gap of Bilayer Graphene with Molecular Doping
Wenjing Zhang,Cheng-Te Lin,Keng-Ku Liu,Teddy Tite,Ching Yuan Su,Chung Huai Chang,Yi-Hsien Lee,Chih-Wei Chu,Kung-Hwa Wei,Jer-Lai Kuo,Lain-Jong Li,Lain-Jong Li +11 more
TL;DR: This research provides a simple method to obtain a graphene bilayer transistor with a moderate on/off current ratio, which can be stably operated in air without the need to use an additional top gate.
Journal ArticleDOI
Purely Coherent Nonlinear Optical Response in Solution Dispersions of Graphene Sheets
Rui Wu,Yingli Zhang,Shichao Yan,Fei Bian,Wenlong Wang,Xuedong Bai,Xinghua Lu,Jimin Zhao,Enge Wang +8 more
TL;DR: The results suggest that this coherent light scattering is due to a broadband, ultrafast, and remarkably huge third-order optical nonlinearity χ(3), which is a manifestation of the graphene's cone-shaped large-energy-scale band structure.
Journal ArticleDOI
Measuring the absolute Raman cross section of nanographites as a function of laser energy and crystallite size
TL;DR: In this paper, the dependence of the differential Raman cross section of the nanographites on the excitation laser energy and also on the crystallite size is reported, showing that the phonon lifetime is proportional to the size of the sample.
Journal ArticleDOI
Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications.
Maryline Nasr,Maryline Nasr,Cynthia Eid,Roland Habchi,Philippe Miele,Philippe Miele,Mikhael Bechelany +6 more
TL;DR: The present literature review focuses on different strategies used to promote the separation efficiency of electron-hole pairs and to shift the absorption edge of TiO2 to the visible region and will help in the development of new strategies to improve the visible-light photocatalytic performance ofTiO2 -based materials further.
Journal ArticleDOI
Electrochemistry of individual monolayer graphene sheets
TL;DR: In this article, the authors report on the fabrication and measurement of devices designed to study the electrochemical behavior of individual monolayer graphene sheets as electrodes and further describe an electrochemical investigation of adsorptive phenomena on graphene surfaces.
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.