نتایج جستجو برای: expandable graphene
تعداد نتایج: 54718 فیلتر نتایج به سال:
Graphene has a negative thermal expansion coefficient; that is, when heated, the graphene lattice shrinks. On the other hand, the substrates typically used for graphene growth, such as silicon carbide, have a positive thermal expansion coefficient. Hence, on cooling graphene on SiC, graphene expands but SiC shrinks. This mismatch will physically break the atomic bonds between graphene and SiC. ...
Folded graphene has exhibited novel electrical and mechanical properties unmatched by pristine graphene, which implies that morphology of graphene adds the dimensionality of design space to tailor its properties. However, how to overcome the energy barrier of the folding process to fold the graphene with the specific morphology remains unexplored. Here we propose a programmable chemical functio...
In recent years, there has been increasing demand for 3D porous graphene structures with excellent 2D characteristics and great potential. As one avenue, several approaches for fabricating 3D porous graphene network structures have been proposed to realize multi-functional graphene materials with 2D graphene structures. Herein, we overview characteristics of 3D porous graphene for applications ...
Abstract BACKGROUNackground and AimD & AIM: In this study, a brief but accurate evaluation of the role of graphene oxide in dentistry and interaction with all soft and hard tissues, the study of studies conducted in vitro or in vivo and new approaches in the field of tissue engineering has been investigated Material & Methods: Reviewed articles using Medline, Google scholar, Scopus, Scien...
Background: In recent years, the unique physical and chemical properties of carbon nanostructures has led to many advancements in various fields, including chemistry and pharmaceuticals. Graphene is one of the carbon nanostructures which have attracted significant attention from researchers in adsorption and release of various drugs. Due to the high surface area of graphene, it can be used as a...
Plasma Enhanced Chemical Vapor Deposition (PECVD) and thermal CVD of graphene films, single-domain graphene dendrites, standing graphene structures, hybrid graphene-diamond nanoplatelets, and hybrid graphite-diamond coatings and their properties and applications will be reported. Grain-boundary engineering of CVD thin-film graphene, diamond, and their hybrids allows novel functions of these nan...
Large-area graphene thin films are prized in flexible and transparent devices. We report on a type of glassy graphene that is in an intermediate state between glassy carbon and graphene and that has high crystallinity but curly lattice planes. A polymer-assisted approach is introduced to grow an ultra-smooth (roughness, <0.7 nm) glassy graphene thin film at the inch scale. Owing to the advantag...
The strong interest in graphene has motivated the scalable production of high-quality graphene and graphene devices. As the large-scale graphene films synthesized so far are typically polycrystalline, it is important to characterize and control grain boundaries, generally believed to degrade graphene quality. Here we study single-crystal graphene grains synthesized by ambient chemical vapour de...
We report the electrochemical properties of pristine monolayer, double layer and few-layer (termed quasi-) graphene grown via CVD and transferred using PMMA onto an insulating substrate (silicon dioxide wafers). Characterisation has been performed by Raman spectroscopy, optical spectroscopy, Atomic Force Microscopy and X-ray Photoelectron Spectroscopy, revealing 'true' pristine single-layer gra...
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