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Near-edge x-ray absorption fine-structure investigation of graphene

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Equipartition of Energy Defines the Size-Thickness Relationship in Liquid-Exfoliated Nanosheets

Nicola Marzari, Davide Campi

Liquid phase exfoliation is a commonly used method to produce 2D nanosheets from a range of layered crystals. However, such nanosheets display broad size and thickness distributions and correlations between area and thickness, issues that limit nanosheet a ...

AMER CHEMICAL SOC2019

Extremely flat band in bilayer graphene

We propose a novel mechanism of flat band formation based on the relative biasing of only one sublattice against other sublattices in a honeycomb lattice bilayer. The mechanism allows modification of the band dispersion from parabolic to "Mexican hat"-like ...

AMER ASSOC ADVANCEMENT SCIENCE2018

Magnetic Stability of Single Lanthanide Atoms on Graphene

Romana Baltic

This thesis presents a study of the magnetism of surface supported atoms performed principally with XMCD spectroscopy and multiplet calculations. The objective of the research was twofold: first, to study the underlying interactions and conditions governi ...

EPFL2018

Nonlinear THz spectroscopy and simulation of gated graphene

Juan Ramon Mosig, Michele Tamagnone

We studied the nonlinear optical properties of single layer graphene using high terahertz (THz) fields. With the use of a back gate and cooling down the sample to cryogenic temperatures we are able to spectrally probe the nonlinear THz properties of intrin ...

IOP PUBLISHING LTD2018

Nano-electromechanical systems based on ultra-thin semiconductors

Sajedeh Manzeli

Nowadays, the interest in 2D materials has gone far beyond graphene. Specially, monolayers of transition metal dichalcogenides (TMDs) offer a broad spectrum of electronic and optical properties, and show the potential to revolutionize the electronics indus ...

EPFL2018

Double-layer graphene for enhanced tunable infrared plasmonics

Hatice Altug, Andreas Tittl, Daniel Rodrigo Lopez, Odeta Limaj

Graphene is emerging as a promising material for photonic applications owing to its unique optoelectronic properties. Graphene supports tunable, long-lived and extremely confined plasmons that have great potential for applications such as biosensing and op ...

Chinese Acad Sciences, Changchun Inst Optics Fine Mechanics And Physics2017

Some Like It Flat: Decoupled h-BN Monolayer Substrates for Aligned Graphene Growth

Silvan Dino Marcos Roth

On the path to functional graphene electronics, suitable templates for chemical vapor deposition (CVD) growth of high -mobility graphene are of great interest. Among various substrates, hexagonal boron nitride (h-BN) has established itself as one of the mo ...

Amer Chemical Soc2016

High Responsivity, Large-Area Graphene/MoS2 flexible photodetectors

Andras Kis, Dumitru Dumcenco, Kolyo Marinov, Domenico De Fazio

We present flexible photodetectors (PDs) for visible wavelengths fabricated by stacking centimeter-scale chemical vapor deposited (CVD) single layer graphene (SLG) and single layer CVD MoS2, both wet transferred onto a flexible polyethylene terephthalate s ...

American Chemical Society2016

Hydrogen on silicene: like or unlike graphene?

Michele Pizzochero

Hydrogenation of free-standing silicene, the two-dimensional allotrope of silicon, is investigated in detail using first-principles methods and compared with the adsorption of H atoms on graphene. Similarly to graphene, chemisorption of a single H atom on ...

Royal Soc Chemistry2016

Graphene

Laurent Syavoch Bernard

We report a full study of graphene synthesis by CVD on Cu surface. Two CVD methods have been developed. The first is a static one, which yields monolayer of graphene at low pressure of methane in 3 minutes at 1000 C. The second one is an equimolar method w ...

EPFL2015