Graphene: Synthesis and features of electronic structure

Shikin, A. M.; Рыбкин, А. Г.; Marchenko, D.; Popova, A. A.; Varykhalov, A.; Rader, O.

doi:10.1134/s1995078011050132

Cited by 3 publications

(6 citation statements)

References 29 publications

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“…Intercalation of Au (and other noble metal Cu, Ag) atoms underneath graphene on the Ni(111) surface, which, as will be shown below, initiates recovery of the electronic structure of graphene brought into contact with metals, was achieved by evaporation of Au (Cu, Ag) atoms on the surface of graphene synthesized on Ni(111), followed by annealing of the system at 700 K. For details of the technology employed in fabricating the systems, the reader is referred to [16,[20][21][22][23][24][25][26].…”

Section: Experimental Methodsmentioning

confidence: 99%

“…As demonstrated experimentally [16,[18][19][20][21][22][23][24][25][26], the unique electronic structure characteristic of freestanding graphene can also be restored for graphene synthesized on Ni(111) and Co(0001) surfaces by introducing monolayers of noble metals between the ferromagnetic metal (FM) and the graphene. Studies performed by angle-and spin-resolved photoelectron spectroscopy revealed that intercalation of monolayers of Au, Cu and Ag under a graphene monolayer synthesized on Ni(111) results in blocking the strong covalent interaction of graphene with the Ni substrate [20,22,23].…”

Section: Restoration Of the Electronic Structure Of Graphene Synthesi...mentioning

confidence: 99%

“…Studies performed by angle-and spin-resolved photoelectron spectroscopy revealed that intercalation of monolayers of Au, Cu and Ag under a graphene monolayer synthesized on Ni(111) results in blocking the strong covalent interaction of graphene with the Ni substrate [20,22,23]. As a result, the electronic structure of the graphene valence band on a surface with intercalated noble metal layers becomes similar to that of quasifree-standing graphene with linear dispersion of the graphene π states in the region near the K point of the surface Brillouin zone [16,[23][24][25].…”

Section: Restoration Of the Electronic Structure Of Graphene Synthesi...mentioning

confidence: 99%

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The graphene/Au/Ni interface and its application in the construction of a graphene spin filter

Aa¹,

Ag²,

Adamchuk³

et al. 2013

Nanotechnology

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A modification of the contact of graphene with ferromagnetic electrodes in a model of the graphene spin filter allowing restoration of the graphene electronic structure is proposed. It is suggested for this aim to intercalate into the interface between the graphene and the ferromagnetic (Ni or Co) electrode a Au monolayer to block the strong interaction between the graphene and Ni (Co) and, thus, prevent destruction of the graphene electronic structure which evolves in direct contact of graphene with Ni (Co). It is also suggested to insert an additional buffer graphene monolayer with the size limited by that of the electrode between the main graphene sheet providing spin current transport and the Au/Ni electrode injecting the spin current. This will prevent the spin transport properties of graphene from influencing contact phenomena and eliminate pinning of the graphene electronic structure relative to the Fermi level of the metal, thus ensuring efficient outflow of injected electrons into the graphene. The role of the spin structure of the graphene/Au/Ni interface with enhanced spin-orbit splitting of graphene π states is also discussed, and its use is proposed for additional spin selection in the process of the electron excitation.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Restoration Of the Electronic Structure Of Graphene Synthesi...mentioning

confidence: 99%

Section: Restoration Of the Electronic Structure Of Graphene Synthesi...mentioning

confidence: 99%

See 1 more Smart Citation

The graphene/Au/Ni interface and its application in the construction of a graphene spin filter

Aa¹,

Ag²,

Adamchuk³

et al. 2013

Nanotechnology

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“…103 Commercial interest to graphene is specied by its high mechanical rigidity, thermal and chemical stability, thermo-and electroconductivity, good electromechanical characteristics, nonlinear optical and some other unique properties. 103,[110][111][112][113] Hundreds of papers published are aimed at the search for possibilities of using graphene in micro-and nanoelectronics, while it shows properties valuable for other applications including the development of polymer composites.…”

Section: Preparation Methods and Properties Of Graphene And Graphene-...mentioning

confidence: 99%

“…Of importance are also such characteristics as particle size, boundary structures, type and quantity of defects and functional groups formed in layers during synthesis. 103,112,119 These parameters are dependent on the preparation procedure, reaction conditions and nature of a precursor. An original method for preparation of GNS was proposed.…”

Section: Preparation Methods and Properties Of Graphene And Graphene-...mentioning

confidence: 99%

Nanocomposites based on polyurethanes and carbon nanoparticles: preparation, properties and application

2013

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Reflection of Slow Electrons from Graphene on the (110)W Face

Нищенко¹,

Smolnik²,

Shevchenko³

2016

Metallofiz. Noveishie Tekhnol.

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Методами спектроскопии полного тока и контактной разницы потенциа-лов в варианте Андерсона изучалось влияние ступенчатого нагрева в диа-пазоне 1300-2800 К в вакууме до 510 10 Па на работу выхода  и отраже-ние медленных электронов (Е  0-50 эВ) от грани (110)W. Установлено, что при 2400 К на ней формируется монослой углерода (графен) с   5,08  0,02 эВ в результате сегрегации его из объёма. Повышение тем-пературы до 2800 К и обработка в кислороде удаляют углерод, и образует-ся атомарно-чистая грань (110)W с   5,30 эВ. Наблюдаются пики коэф-фициента отражения электронов от этих поверхностей. Установлено, что их энергетическое положение (Е) пропорционально квадрату порядкового номера (n) пика, что объясняется квантово-размерными эффектами при надбарьерном отражении электронов. Для грани (110)W наблюдается 3 пика, интенсивности которых с ростом n убывают от 45% до 18%, а для графена на ней -6 пиков (при этом интенсивности первых двух падают до 10%).Методами спектроскопії повного струму і контактної ріжниці потенціялів у Андерсоновому варіянті вивчено вплив східчастого нагріву в діяпазоні 1300-2800 К у вакуумі до 510 10 Па на роботу виходу  і відбивання пові-льних електронів (Е  0-50 еВ) від грані (110)W. Встановлено, що при 2400 К на ній формується внаслідок сеґреґації моношар вуглецю (графен) з   5,08  0,02 еВ. Підвищення температури до 2800 К і оброблення в ки-сні видаляють Карбон і утворюється атомарно-чиста грань (110)W з   5,30 еВ. Спостерігаються піки коефіцієнта відбивання електронів від цих поверхонь. Встановлено, що їх енергетичне положення (Е) пропор-ційне квадрату порядкового номера (n) піка, що пояснюється квантово-розмірними ефектами при надбар'єрному відбиванні електронів. Для грані (110)W спостерігаються 3 піки, інтенсивності яких із ростом n зме-ншуються від 45% до 18%, а для графену на ній -6 піків (при цьому ін-тенсивності перших двох зменшуються до 10%).

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Graphene: Synthesis and features of electronic structure

Cited by 3 publications

References 29 publications

The graphene/Au/Ni interface and its application in the construction of a graphene spin filter

The graphene/Au/Ni interface and its application in the construction of a graphene spin filter

Nanocomposites based on polyurethanes and carbon nanoparticles: preparation, properties and application

Reflection of Slow Electrons from Graphene on the (110)W Face

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