Rapid epitaxy-free graphene synthesis on silicidated polycrystalline platinum

Rapid epitaxy-free graphene synthesis on silicidated polycrystalline platinum

Large-area synthesis of high-quality graphene by chemical vapour deposition on metallic substrates requires polishing or substrate grain enlargement followed by a lengthy growth period. Here we demonstrate a novel substrate processing method for facile synthesis of mm-sized, single-crystal graphene by coating polycrystalline platinum foils with a silicon-containing film. The film reacts with pl...

Polycrystalline graphene ribbons as chemiresistors.

A IO N Graphene is a two-dimensional semimetal with zero band gap that exhibits excellent electrical, mechanical and thermal properties.[1,2] Transport through delocalized pi bonds allows charge carriers in graphene to achieve high mobility[3,4] for both electrons and holes, over ∼105 cm2/V·s for freely suspended graphene and >104 cm2/V·s for graphene on SiO2. Recent studies have suggested that...

Electronic transport in polycrystalline graphene.

Most materials in available macroscopic quantities are polycrystalline. Graphene, a recently discovered two-dimensional form of carbon with strong potential for replacing silicon in future electronics, is no exception. There is growing evidence of the polycrystalline nature of graphene samples obtained using various techniques. Grain boundaries, intrinsic topological defects of polycrystalline ...

Size Effects on the Thermal Conductivity of Polycrystalline Platinum Nanofilms

Polycrystalline Platinum Nanofilms Q. G. ZHANG, B. Y. CAO, X. ZHANG, M. FUJII and K. TAKAHASHI, J. Phys.: Condens. Matter, 2006, 18, (34), 7937–7950 The thicknesses of the studied polycrystalline Pt nanofilms (1) ranged from 15.0–63.0 nm and the mean grain sizes varied from 9.5–26.4 nm. The thermal conductivities of (1) measured by a direct electrical heating method are greatly reduced from the...

Local reaction kinetics by imaging: CO oxidation on polycrystalline platinum.