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The kinetic performance of graphite particles is difficult to deconvolute from half-cell experiments, where the influences of the working electrode porosity and the counter electrode contribute nonlinearly to the electrochemical re-sponse.…

Materials Science · Physics 2015-03-13 Michael Heß , Petr Novák

The intercalation of an oxide barrier between graphene and its metallic substrate for chem- ical vapor deposition is a contamination-free alternative to the transfer of graphene to dielectric supports, usually needed for the realization of…

The field of superconductivity in the class of materials known as graphite intercalation compounds has a history dating back to the 1960s. This paper recontextualizes the field in light of the discovery of superconductivity in CaC6 and YbC6…

Ca-intercalation has opened a way for superconductivity in graphene on SiC. However, the atomic and electronic structures being critical for superconductivity are still under discussion. We find the essential role of the interface between…

High-quality, large-area epitaxial graphene can be grown on metal surfaces but its transport properties cannot be exploited because the electrical conduction is dominated by the substrate. Here we insulate epitaxial graphene on Ru(0001) by…

we have fabricated transparent electronic devices based on graphene materials with thickness down to one single atomic layer by the transfer printing method. The resulting printed graphene devices retain high field effect mobility and have…

Materials Science · Physics 2008-09-10 Jian-Hao Chen , Masa Ishigami , Chaun Jang , Daniel R. Hines , Michael S. Fuhrer , Ellen D. Williams

Poor quality interfaces between metal and graphene cause non-linearity and impair the carrier mobility in graphene devices. Here, we use aberration corrected scanning transmission electron microscopy to observe hexagonally close-packed Ti…

Mesoscale and Nanoscale Physics · Physics 2023-09-25 Georg Zagler , Alberto Trentino , Kimmo Mustonen , Clemens Mangler , Jani Kotakoski

Interfacing graphene with solid-state devices and maintaining it free of contamination is a crucial step towards a functioning device, be it a semiconductor structure or any other device for technological applications. We take advantage of…

Mesoscale and Nanoscale Physics · Physics 2014-08-27 Jean-Nicolas Longchamp , Conrad Escher , Hans-Werner Fink

Graphene is a sturdy and chemically inert material exhibiting an exposed two-dimensional electron gas of high mobility. These combined properties enable the design of graphene composites either based on covalent or non- covalent coupling of…

Mesoscale and Nanoscale Physics · Physics 2015-03-19 Adrien Allain , Zheng Han , Vincent Bouchiat

We report the structural and electronic properties of an artificial graphene/Ni(111) system obtained by the intercalation of a monoatomic layer of Ni in graphene/Ir(111). Upon intercalation, Ni grows epitaxially on Ir(111), resulting in a…

As the Fermi level and band structure of two-dimensional materials are readily tunable, they constitute an ideal platform for exploring Lifshitz transition, a change in the topology of a material's Fermi surface. Using tetralayer graphene…

Mesoscale and Nanoscale Physics · Physics 2018-03-09 Yanmeng Shi , Shi Che , Kuan Zhou , Supeng Ge , Ziqi Pi , Timothy Espiritu , Takashi Taniguchi , Kenji Watanabe , Yafis Barlas , Roger Lake , Chun Ning Lau

We report on spectroscopy results from the mid- to far-infrared on wafer-scale graphene, grown either epitaxially on silicon carbide, or by chemical vapor deposition. The free carrier absorption (Drude peak) is simultaneously obtained with…

Mesoscale and Nanoscale Physics · Physics 2011-11-17 Hugen Yan , Fengnian Xia , Wenjuan Zhu , Marcus Freitag , Christos Dimitrakopoulos , Ageeth A. Bol , George Tulevski , Phaedon Avouris

The electronic properties of graphene are unique and are attracting increased attention to this novel 2-dimensional system. Its photonic properties are not less impressive. For example, this single atomic layer absorbs through direct…

Materials Science · Physics 2009-12-25 Fengnian Xia , Thomas Mueller , Yu-ming Lin , Alberto Valdes-Garcia , Phaedon Avouris

The process of anion intercalation in graphite and its reversibility plays a crucial role in the next generation energy-storage devices. Herein the reaction mechanism of the aluminum graphite dual ion cell by operando X-ray scattering from…

Materials Science · Physics 2024-02-21 Giorgia Greco , Giuseppe Antonio Elia , Daniel Hermida-Merino , Robert Hahn , Simone Raoux

We use first-principles calculation within the density functional theory (DFT) to explore the electronic properties on stage-1 Li- and Li+-graphite-intercalation compounds (GIC) for different concentrations, LiCx/Li+Cx with x= 6,12,18,24,32…

Materials Science · Physics 2020-06-24 Wei-Bang Li , Shih-Yang Lin , Ngoc Thanh Thuy Tran , Kuang-I Lin , Ming-Fa Lin

While preserving many of the unusual features of single-layer graphene, few-layer graphene (FLG) provides a richness and flexibility of electronic structure that render this set of materials of great interest for both fundamental studies…

Mesoscale and Nanoscale Physics · Physics 2009-08-04 Kin Fai Mak , Matthew Y. Sfeir , James A. Misewich , Tony F. Heinz

We address the in-plane pressure-dependent electrodynamics of graphite through synchrotron based infrared spectroscopy and ab initio Density Functional Theory calculations. The Drude term remarkably increases upon pressure application, as a…

Materials Science · Physics 2012-07-12 A. Perucchi , L. Baldassarre , C. Marini , P. Postorino , F. Bernardini , S. Massidda , S. Lupi

The diversified essential properties of the stage-n graphite alkali-intercalation compounds are thoroughly explored by the first-principles calculations. According to their main features, the lithium and non-lithium materials might be quite…

Materials Science · Physics 2020-06-23 Wei-bang Li , Ngoc Thanh Thuy Tran , Shih-yang Lin , Ming-Fa Lin

The extraordinary electronic and optical properties of the crystal-to-amorphous transition in phase-change materials led to important developments in memory applications. A promising outlook is offered by nanoscaling such phase-change…

Realizing laterally continuous ultra-thin gold films on transparent substrates is a challenge of significant technological importance. In the present work, formation of ultra-thin gold films on fused silica is studied, demonstrating how…

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