Sentences with phrase «of graphene flakes»

Göteborg, Sweden (Scicasts)-- A tiny layer of graphene flakes becomes a deadly weapon and kills bacteria, stopping infections during procedures such as implant surgery.

Individual Ni atoms catalyzing the growth of a graphene flake along its edges were imaged on the millisecond time scale.

Not exact matches

The catalytic action of individual Ni atoms at the edges of a growing graphene flake was directly captured by scanning tunneling microscopy imaging at the millisecond time scale, while force field molecular dynamics and density functional theory calculations rationalize the experimental observations.

Bruce Kane at the University of Maryland in College Park sprayed charged graphene flakes a micron wide into a vacuum chamber.

But recently, scientists have discovered that radioactive materials in water can clump onto flakes of graphene oxide (GO).

Researchers discovered graphene, or one - atom - thick sheets of carbon, by mechanically peeling progressively finer layers from raw flakes of graphite, the same stuff found in pencil lead (See: «Carbon Wonderland,» by Andre K. Geim and Philip Kim, in the April issue of Scientific American).

Theoretically, macroscopical three - dimensional graphene assemblies should retain the properties of nanoscale graphene flakes.

The foam consists of microscopic, cross-linked flakes of graphene, the two - dimensional form of carbon.

Without oxygen, heat from the laser doesn't burn the pine but transforms the surface into wrinkled flakes of graphene foam bound to the wood surface.

Physicist Philip Kim of Columbia University began trying to flake off graphene layers in 2002 by dragging a tiny graphite rod with an atomic force microscope, which is like an exquisitely sensitive phonograph needle.

The laser burns away everything but the carbon to a depth of 20 microns on the top layer, which becomes a foam - like matrix of interconnected graphene flakes.

The product is not a two - dimensional slice of graphene but a porous foam of interconnected flakes about 20 microns thick.

It is based on a tiny flake of graphene, a material from which a veritable research boom has arisen since its discovery and for which the Nobel Prize was awarded in 2010.

An electron microscope image shows flake - like nanoplatelets made of graphene quantum dots drawn from coal and graphene oxide sheets, modified with boron and nitrogen.

Higher frequencies and shorter treatments did not lead to significant damage of the graphene oxide flakes and produced larger scrolls, while low frequencies and longer treatment times tended to cleave flakes apart and create smaller scrolls.

Stein and Amadei applied both techniques to solutions of graphene oxide flakes and observed similar effects: The bubbles that were created in solution eventually collapsed, releasing energy that caused the flakes to spontaneously curl into scrolls.

Stein and Amadei first used a common technique called the Hummers» method to separate graphite flakes into individual layers of graphene oxide.

Flakes of graphene welded together into solid materials may be suitable for bone implants, according to a study led by Rice University scientists.

A layer of vertical graphene flakes forms a protective surface that makes it impossible for bacteria to attach.

«Compared to those small molecules used in current hair dyes, graphene flakes are humongous,» said Huang, who is a member of Northwestern's International Institute of Nanotechnology.

In this case, the ink is flakes of graphene - the wonder material can be a great conductor of electricity and heat, plus it's strong, stable and biocompatible.

Graphene flakes can have a very large proportion of edge atoms, all of which have a particular chemical reactivity.

Many researchers — including Jonathan Coleman at Trinity College Dublin — have been chasing ways to make large amounts of good - quality graphene flakes.

The result, the team reports: a large number of micrometre - sized flakes of graphene, suspended in the water.

Meany: My opinion is that once we can control the graphene production process so that we can make a centimeter square flake of graphene, it might as well be a hundred meters or a thousand meters squared.