Sentences with phrase «graphene foam»

Additionally, graphene foam has shown to pick up tiny concentrations of nitrates and ammonia that are found in explosives.

In the latest study, a team from Tour's lab and the labs of Rice's Jun Luo and Tianjin's Naiqin Zhao adapted a common 3 - D printing technique to make fingertip - size blocks of graphene foam.

Back in February, researchers from Rice University created 3D graphene foam supported by carbon nanotubes, but it was difficult to make.

For example, researchers in Tour's lab began using lasers, powdered sugar and nickel to make 3 - D graphene foam in late 2016.

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.

A chunk of conductive graphene foam reinforced by carbon nanotubes can support more than 3,000 times its own weight and easily bounce back to its original height, according to Rice University scientists.

In recent years, the lab has developed and expanded upon its method to make graphene foam by using a commercial laser to transform the top layer of an inexpensive polymer film.

Graphene foam produced without the rebar could support only about 150 times its own weight while retaining the ability to rapidly return to its full height.

With its spindly neon tendrils, a false - coloured image of graphene foam, stripped of its skeleton, has won first prize in an annual engineering photo competition

«We have shown how to make 3 - D graphene foams from nongraphene starting materials, and the method lends itself to being scaled to graphene foams for additive manufacturing applications with pore - size control.»

Not exact matches

It involved dispersing graphene oxide in a solution, loading in a small amount of ruthenium and then freeze - drying the new solution and turning it into a foam.

The resulting products display a foam - like porous structure, ideal for maximizing the benefits of graphene, with the porosity tunable from ultra-light to highly dense through simple changes in experimental conditions.

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.

Electron microscope images of the foam showed partially unzipped outer layers of the nanotubes had bonded to the graphene, which accounted for its strength and resilience.

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

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.

Tests by Bao's lab compared nickel foam and the phosphide both with and without graphene in the middle and found the conductive graphene lowered charge - transfer resistance for both hydrogen and oxygen reactions.

A film of high - surface - area nickel foam coated with graphene and a compound of iron, manganese and phosphorus serve as a water - splitting catalyst that can produce hydrogen and oxygen simultaneously.

One to three layers of graphene are formed on the nickel foam in a chemical vapor deposition (CVD) furnace, and the iron, manganese and phosphorus are added on top of that, also via CVD and from a single precursor.

Earlier this year they showed that they could reinforce the foam with carbon nanotubes, which produced a material they dubbed «rebar graphene» that could retain its shape while supporting 3,000 times its own weight.

The foam created by the process is a low - density, 3 - D form of graphene with large pores that account for more than 99 percent of its volume.

Its second pass converts the carbon foam into graphene.

They rely on a ferrous metaphosphate deposited on graphene - coated nickel foam.