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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High-harmonic generation in graphene enhanced by elliptically polarized light excitation
TL;DR: The observation of up to ninth-order harmonics in graphene excited by mid-infrared laser pulses at room temperature opens up the possibility of investigating strong-field and ultrafast dynamics and nonlinear behavior of massless Dirac fermions.
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Flexible Boron-Doped Laser-Induced Graphene Microsupercapacitors.
Zhiwei Peng,Ruquan Ye,Jason A. Mann,Dante Zakhidov,Yilun Li,Preston R. Smalley,Jian Lin,James M. Tour +7 more
TL;DR: It is demonstrated that boron-doped porous graphene can be prepared in ambient air using a facile laser induction process from boric acid containing polyimide sheets, and active electrodes can be patterned for flexible microsupercapacitors.
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Fe5C2 nanoparticles: a facile bromide-induced synthesis and as an active phase for Fischer-Tropsch synthesis.
TL;DR: A facile wet-chemical route for the synthesis of Hägg iron carbide nanoparticles, in which bromide was found to be the key inducing agent for the conversion of Fe(CO)(5) to Fe(5)C(2) in the synthetic process, showing enhanced catalytic performance in terms of CO conversion and product selectivity.
Journal ArticleDOI
Selective sputtering and atomic resolution imaging of atomically thin boron nitride membranes.
TL;DR: The observation of clean single-layer membranes shows that hexagonal boron nitride is a further material (in addition to graphene) that can exist in a quasi-two-dimensional allotrope without the need for a substrate.
Journal ArticleDOI
Graphene, hexagonal boron nitride, and their heterostructures: properties and applications
TL;DR: In this paper, the synthesis, structure, properties, and applications of two-dimensional (2D) materials such as graphene, hexagonal boron nitride (h-BN), silicene, germanium, black phosphorus (BP), transition metal sulfides and so on.
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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.