In this work we present a low cost and scalable technique, via ambient pressure chemical vapor deposition (CVD) on polycrystalline Ni films, to fabricate large area (∼cm2) films of single- to few-layer graphene and to transfer the films to nonspecific substrates. These films consist of regions of 1 to ∼12 graphene layers. Single- or bilayer regions can be up to 20 μm in lateral size. The films are continuous over the entire area and can be patterned lithographically or by prepatterning the underlying Ni film. The transparency, conductivity, and ambipolar transfer characteristics of the films suggest their potential as another materials candidate for electronics and opto-electronic applications.

/pdf/large-area-few-layer-graphene-films-on-arbitrary-substrates-6jt6fxed99.pdf

Large Area, Few-Layer Graphene Films on Arbitrary Substrates by Chemical Vapor Deposition

Raman spectroscopy in graphene

We present the science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems, targeting an evolution in technology, that might lead to impacts and benefits reaching into most areas of society. This roadmap was developed within the framework of the European Graphene Flagship and outlines the main targets and research areas as best understood at the start of this ambitious project. We provide an overview of the key aspects of graphene and related materials (GRMs), ranging from fundamental research challenges to a variety of applications in a large number of sectors, highlighting the steps necessary to take GRMs from a state of raw potential to a point where they might revolutionize multiple industries. We also define an extensive list of acronyms in an effort to standardize the nomenclature in this emerging field.

/pdf/science-and-technology-roadmap-for-graphene-related-two-4q9m7czlkc.pdf

Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems

We report an approach to synthesize high quality graphene by surface segregation and substrate transfer. Graphene was segregated from Ni surface under the ambient pressure by dissolving carbon in Ni at high temperatures followed by cooling down with various rates. Different cooling rates led to different segregation behaviors, strongly affecting the thickness and quality of the graphene films. Electron microscopy and Raman spectroscopy indicated that the graphene films synthesized with medium cooling rates have high quality crystalline structure and well-controlled thicknesses. The graphene films were transferred to insulating substrates by wet etching and found to maintain their high quality.

/pdf/graphene-segregated-on-ni-surfaces-and-transferred-to-464lpv30xk.pdf

Graphene segregated on Ni surfaces and transferred to insulators

https://cyberleninka.org/article/n/323323.pdf

Production and processing of graphene and 2d crystals

Carbon on transition metal surfaces

Two-dimensional graphite films (2DGF) on solids are wonderful objects, real nature-made two-dimensional crystals. Formation on active metal surface of a 2DGF with extremely high adsorption, chemical and catalytic passivity leads to a number of staggering effects. The review is devoted to 2DGF on metals and their nature, structure, modes of formation and physico chemical properties. A nature of absorption bond between 2DGF and metal substrate is discussed in details. A special attention is paid to intercalation of 2DGF — a process when foreign atoms and even molecules (fullerenes C60 molecules) spontaneously penetrate between graphite film and metal substrate. Modes of intercalation are discussed and a mechanism of it, based on thermal movements of carbon atoms of a graphite layer, proposed earlier, is used for explanation of experimental data. A new, practically important effect-superefficient diffusion of alkaline atoms into transition metal bulk, covered by 2DGF, is reported.

Two Dimensional Graphite Films on Metals and Their Intercalation

http://std2.phys.uni.lodz.pl/pdf/ASS_252_1221_2005.pdf

Local electronic edge states of graphene layer deposited on Ir(1 1 1) surface studied by STM/CITS

Carbon interaction with the rhenium surface

High-resolution Auger-electron spectroscopy has revealed intercalation of a graphite monolayer on iridium by ${\mathrm{C}}_{60}$ molecules from a thick deposited film, which occurs at $T\ensuremath{\sim}800$ K. At $T\ensuremath{\sim}1200$ K, the ${\mathrm{C}}_{60}$ molecules contacting with iridium under the graphite film breakup. The carbon thus formed migrates at 1600 K to the opposite side of the Ir ribbon undergoes graphitization at 1900 K, and desorbs at 2200 K.

A. Ya. Tontegode

Papers

Carbon on transition metal surfaces

Two Dimensional Graphite Films on Metals and Their Intercalation

Local electronic edge states of graphene layer deposited on Ir(1 1 1) surface studied by STM/CITS

Carbon interaction with the rhenium surface

Evidence for a C 60 Monolayer Intercalated between a Graphite Monolayer and Iridium