Sentences with phrase «graphene surfaces»

«We believe that the crumpled graphene surfaces can be used as higher surface area electrodes for battery and supercapacitor applications.

The researchers are also investigating the textured graphene surfaces for 3D sensor applications.

Meanwhile, physicists and chemists at HZB produced graphene surfaces several square centimeters in size so that edge effects play hardly any role in comparison to the surface processes.

Scanning tunneling microscope (STM) imaging was used to characterize the nanoscale arrangement of the supramolecular lattices formed on graphite and graphene surfaces, which determines the periodicity and geometry of the induced potentials.

«Uncovering the secrets of friction on graphene: Sliding on flexible graphene surfaces has been uncharted territory until now.»

Images produced from computer simulations show the response of a graphene surface as a silicon tip slides over it.

Also, the pressure exerted on the water is so high that hydrogen bond interactions with the graphene surface are overcome by the attractive van der Waals atomic interaction that draws together the graphene planes.

The material, once imprinted, can simply be peeled off from the graphene surface, allowing manufacturers to reuse the original wafer.

The illustration shows how maleimide compounds bind to the graphene surface.

The confinement in this case is produced by the boundary between two different regions on the graphene surface, corresponding to the «p» and «n» regions in a transistor.

Not exact matches

If the process is done in a vacuum, the carbon forms on the surface as graphene; if it is done in oxygen, it forms GO; and if done in a humid atmosphere followed by a vacuum, it forms as rGO.

However, through computer simulations we have uncovered an interesting new diffusion mechanism for motion across graphene that is inherently different from the usual random movements we see on other surfaces.»

«On the other hand, freestanding graphene has a very flexible surface, and we found that, due to local strain effects, there is an 80 percent reduction in the amount of platinum needed to maintain effective catalysis.»

Carbon atoms then fall onto the nickel surface, which acts as a catalyst to help form the graphene films.

These simulations reveal that the molecules can «surf» across the surface whilst being carried by the moving ripples of graphene.

Atom - thick graphene is the ideal substrate, Tour said, because of its high surface area, stability in harsh operating conditions and high conductivity.

Patera et al. used a high - speed scanning tunneling microscope to image the growth of graphene islands on a nickel surface.

Scanning tunneling microscopy, which produces images of individual atoms on a surface, was used to view the behavior of the platinum nanoparticles on the graphene.

Their cores may be fluid, but their outer surfaces are solid and extremely tough — making graphene, the strongest material on Earth, look like tissue paper by comparison.

Single adatoms are expected to participate in many processes occurring at solid surfaces, such as the growth of graphene on metals.

The growth of graphene on metal surfaces can be catalyzed by mobile surface metal atoms.

The neural probes are placed directly on the surface of the brain, so safety is of paramount importance for the development of graphene - based neural implant devices.

In 2007, for instance, researchers found that graphene was not truly planar but had a characteristic roughness in the form of nanometer - size surface ripples.

«In principle, given the variety of chemical molecules that can bind to graphene's surface, this research can result in the development of molecular electronics devices with novel functionalities based on superconducting graphene,» Di Bernardo added.

Because all of the atoms in graphene are at the surface, individual atoms and any defects in the structure are directly visible in a high resolution electron microscope, but at the same time they easily interact with the environment.

Since graphene was experimentally discovered in 2004, it has been the focus of vigorous applied research due to its outstanding properties such as high specific surface area, good thermal and electrical conductivities, and many more properties.

In this way, the researchers managed to demonstrate that organic supramolecular lattices are suitable to create controllable 1D periodic potentials on the surface of graphene.

Even though electrons entered only at the 1D atomic edge of the graphene sheet, the contact resistance was remarkably low, reaching 100 ohms per micron of contact width — a value smaller than what is typically achieved for contacts at the graphene top surface.

Researchers had previously found that while one layer of graphene on a surface reduces friction, having a few more was even better.

Baking that at 750 degrees Celsius (1,382 degrees Fahrenheit) in the presence of nitrogen and hydrogen gas reduced the graphene and locked nitrogen atoms to the surface, providing sites where ruthenium atoms could bind.

Left: the Fermi surface of graphene (top) and the Dirac cone (bottom).

To achieve this the researchers took advantage of the manner in which Fe atoms move across the surface of graphene when irradiated by electrons in a transmission electron microscope (TEM).

The trick was to grow graphene sheets on a rippling surface covered in parallel trenches.

«Graphene is the thinnest known material and is very sensitive to whatever happens on its surface,» Berry said.

As these atoms move across the surface if they encounter an open graphene edge they tend to get trapped there.

Like tiny superscrubbers, these charged molecules effectively scour the copper of surface imperfections providing a pristine surface on which to grow graphene.

Because the graphene - based terahertz scanner is bendable you'll get a much better resolution and can retrieve more information than if the scanner's surface is flat,» says Vorobiev.

While coating the electrode surface with a thin layer of carbon or graphene had been shown to improve performance, there was no microscopic and quantitative understanding of why this made a difference, Bazant says.

In graphene, electrons skate across the surface 100 times as fast as in standard silicon.

«The unique electronic structure of graphene along with its particular surface topography make it an ideal substrate for decoration with gold nanoparticles.

Graphene nanoribbons are synthesized on a gold surface and interconnected to create a well - defined pore network.

Researchers at Umeå University, together with researchers at Uppsala University and Stockholm University, show in a new study how nitrogen doped graphene can be rolled into perfect Archimedean nano scrolls by adhering magnetic iron oxide nanoparticles on the surface of the graphene sheets.

«Interestingly, it has very weak Van der Waals forces, meaning it doesn't react with anything vertically, which makes graphene's surface very slippery.»

The team now reports that graphene, with its ultrathin, Teflon - like properties, can be sandwiched between a wafer and its semiconducting layer, providing a barely perceptible, nonstick surface through which the semiconducting material's atoms can still rearrange in the pattern of the wafer's crystals.

By eliminating graphene's corrugations, researchers hope to find out how much surface texture influences its properties

Rather than a flat sheet of hexagonal carbon atoms, LIG is a foam of graphene sheets with one edge attached to the underlying surface and chemically active edges exposed to the air.

«For the first time, we were able to precisely and accurately detect how many molecules actually were grafted to the surface of the graphene,» reports junior researcher Felix Rösicke, who investigated this problem for his doctoral dissertation.

Using a technique that introduces tiny wrinkles into sheets of graphene, researchers from Brown University have developed new textured surfaces for culturing cells in the lab that better mimic the complex surroundings in which cells grow in the body.

Rice scientists used an industrial laser to heat the wood and turned its surface into highly conductive graphene.

Rice University scientists have made wood into an electrical conductor by turning its surface into graphene.