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Experiment shows that optical properties of 3D graphene are tuneable

An international research team has for the first time investigated the optical properties of three-dimensional nanoporous graphene. The experiments show that the plasmonic excitations in this new material can be precisely controlled by the pore size and by introducing atomic impurities.

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Large portfolio of 2D semiconductor materials benefits next-generation flexible electronics

Inspired by the unique optical and electronic property of graphene, two-dimensional layered materials – as well as their hybrids – have been intensively investigated in recent years, driven by their potential applications for nanoelectronics. The broad spectrum of atomic layered crystals includes transition metal dichalcogenides (TMDs), semiconducting dichalcogenides, monoatomic buckled crystals, such as black phosphorous (BP), and diatomic hexagonal boron nitride, etc. Tihis article examines the recent advancement of flexible 2D electronic devices based on TMDs and BP.

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A Kinetic Pathway toward High-Density Ordered N Doping of Epitaxial Graphene on Cu(111) Using C5NCl5 Precursors

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Journal of the American Chemical Society
DOI: 10.1021/jacs.6b12506

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Graphene-nanotube hybrid boosts lithium metal batteries

Scientists have built high-capacity lithium metal batteries with anodes made of a graphene-carbon nanotube hybrid. The anodes quench the formation of damaging dendrites.

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Using graphene to create quantum bits

Researchers have investigated a nonlinear graphene-based quantum capacitor, compatible with cryogenic conditions of superconducting circuits, and based on two-dimensional materials.

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Graphene-nanotube hybrid boosts lithium metal batteries

Scientists have created a rechargeable lithium metal battery with three times the capacity of commercial lithium-ion batteries by resolving something that has long stumped researchers: the dendrite problem.

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High-harmonic generation in graphene enhanced by elliptically polarized light excitation

The electronic properties of graphene can give rise to a range of nonlinear optical responses. One of the most desirable nonlinear optical processes is high-harmonic generation (HHG) originating from coherent electron motion induced by an intense light field. Here, we report on the observation of up to ninth-order harmonics in graphene excited by mid-infrared laser pulses at room temperature. The HHG in graphene is enhanced by an elliptically polarized laser excitation, and the resultant harmonic radiation has a particular polarization. The observed ellipticity dependence is reproduced by a fully quantum mechanical treatment of HHG in solids. The zero-gap nature causes the unique properties of HHG in graphene, and our findings open up the possibility of investigating strong-field and ultrafast dynamics and nonlinear behavior of massless Dirac fermions.

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Graphene takes light to a higher level

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Emergence of Tertiary Dirac Points in Graphene Moiré Superlattices

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Nano Letters
DOI: 10.1021/acs.nanolett.7b00735

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Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits — or qubits — that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

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