Sentences with phrase «super-stretchable graphene oxide»

Researchers at Rice University have proved that adding graphene oxide to water - based drilling fluids can improve oil extraction by minimizing potential leakage.

A few years ago, his lab made graphene oxide — a functional form of graphene — and fabricated it into a multilayer, micrometer - thick, paper - like membrane.

Materials researchers at North Carolina State University have developed a technique that allows them to integrate graphene, graphene oxide (GO) and reduced graphene oxide (rGO) onto silicon substrates at room temperature by using nanosecond pulsed laser annealing.

«Super-strong graphene oxide: In situ bandgap tuning of graphene oxide achieved by electrochemical bias.»

Super-strong graphene oxide (GO) sheets are useful for ultrathin, flexible nano - electronic devices, and display unique properties including photoluminescence and room temperature ferromagnetism.

The ability to modulate the physical properties of graphene oxide within electronic components could have numerous applications in technology.

People might purify irradiated water using a substance called graphene oxide, and they could grow food using aquaponics systems that cycle nutrients between plants and fish.

Their research proved that a graphene oxide coating over sulfur can solve both problems.

The researchers discovered that heat - treating graphene oxide and small amounts of cobalt salts in a gaseous environment forced individual cobalt atoms to bind to the material.

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.

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

Dr Joshi said: «The new treatment system is made by converting naturally occurring graphite into graphene oxide membranes that allow high water flow at atmospheric pressure, while removing virtually all of the organic matter.»

However, this approach requires precision engineering of nano - features (in a detection chip), complex optical setups, novel nano - probes (such as graphene oxide, carbon nanotubes, and gold nanorods) or additional amplification steps such as aggregation of nanoparticles to achieve sensitive detection of biomarkers.

Dr Joshi has an international reputation in this area, having published many highly cited articles including one in the journal Science on graphene oxide - based filtration in 2014 while working at the University of Manchester with Nobel Laureate Sir Andre Geim.

«We found this graphene oxide fiber was very strong, much better than other carbon fibers.

Researchers at Penn State and Shinshu University in Japan have developed a simple, scalable method of making graphene oxide (GO) fibers that are strong, stretchable and can be easily scrolled into yarns with strengths approaching that of Kevlar.

Further testing of the material suggested that crosslinking, or bonding, using transition metals and rare - earth metals, caused the graphene oxide to possess new semiconducting, magnetic and optical properties.

Graphene oxide is a common intermediate for graphene and graphene - derived materials made from graphite, which is a crystalline form of carbon.

To make a moisture - driven crawler, the researchers cut flash - treated graphene oxide into an insect shape with four legs.

Other groups have shown that graphene oxide can be made moisture responsive through a chemical reaction called reduction, which removes oxygen from molecules.

«The development of smart materials such as moisture - responsive graphene oxide is of great importance to automation and robotics,» said Yong - Lai Zhang of Jilin University, China, and leader of the research team.

In the journal Optical Materials Express, from The Optical Society (OSA), the researchers reported that graphene oxide sheets treated with brief exposure to bright light in the form of a camera flash exhibited reversible bending at angles from zero to 85 degrees in response to switching the relative humidity between 33 and 86 percent.

The researchers used flash - treated graphene oxide to create a crawler that moved when humidity was increased.

Researchers from Monash University have discovered that graphene oxide sheets can change structure to become liquid crystal droplets spontaneously and without any specialist equipment.

The researchers also made a claw shape by sticking together eight 5 - by - 1 millimeter ribbons of flash - treated graphene oxide in a star shape.

By 3D printing the bacteria in precise patterns on the graphene oxide, they hope to carve lines of conductivity, like tiny wires, on an otherwise non-conductive surface.

They now want to use the technique with Shewanella oneidensis, a bacterium that can reduce graphene oxide by removing oxygen atoms as it metabolises.

A camera flash allowed the researchers to remove oxygen from, or reduce, just one side of a sheet of graphene oxide.

They showed that the lithium ions form a thin film on the surface of the graphene oxide and then diffuse through defect sites — essentially gaps in the layers of the material — before settling below the bottom layer of the graphene oxide.

Reduced graphene oxide behaves more like graphene, which has useful properties such as conductivity.

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.

Binghamton University researchers have demonstrated an eco-friendly process that enables unprecedented spatial control over the electrical properties of graphene oxide.

Because the process developed by Mativetsky avoids the use of harmful chemicals, high temperatures or inert gas atmospheres, his work represents a promising step towards environmentally - friendly manufacturing with graphene oxide.

«Unlike standard methods for manipulating the properties of graphene oxide, our process can be implemented under ambient conditions and is environmentally - benign, making it a promising step towards the practical integration of graphene oxide into future technologies.»

Graphene oxide is a closely - related two - dimensional material with certain advantages over graphene, including simple production and processing, and highly tunable properties.

By using the probe of an atomic force microscope to trigger a local chemical reaction, Jeffrey Mativetsky, assistant professor of physics at Binghamton University, and PhD student Austin Faucett showed that electrically conductive features as small as four nanometers can be patterned into individual graphene oxide sheets.

For example, by removing some of the oxygen from graphene oxide, the electrically insulating material can be rendered conductive, opening up prospects for use in flexible electronics, sensors, solar cells and biomedical devices.

To make all that possible, the engineers developed computer - controlled laser technology that selectively irradiates inkjet - printed graphene oxide.

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.

Graphene oxide is graphene that is also covered with oxygen and hydrogen groups.

«Graphene oxide is two to four orders of magnitude cheaper, and with our technique, we can tune the dimensions of these architectures and open a window to industry.»

Amadei, as a member of Professor Chad Vecitis» lab at Harvard University, had been working with graphene oxide for water purification applications, while Stein was experimenting with carbon nanotubes and other nanoscale architectures, as part of a group led by Brian Wardle, professor of aeronautics and astronautics at MIT.

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.

Graphene oxide is synthesized under extreme conditions (exposure to highly concentrated sulfuric acid, high temperatures, ultra sonication).

3D - printing bacterial ink onto sheets of graphene oxide could make precise patterns of highly - conductive material in a cheaper and easier way

They then placed the graphene oxide flakes in solution and stimulated the flakes to curl into scrolls, using two similar approaches: a low - frequency tip - sonicator, and a high - frequency custom reactor.

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

Stein says graphene oxide nanoscrolls could also be used as ultralight chemical sensors, drug delivery vehicles, and hydrogen storage platforms, in addition to water filters.

A few groups had tried doing the same with graphene oxide, but their attempts were literally deflated.

As Jake Lanphere, a UC Riverside graduate student who co-authored the paper, which was published in the journal Environmental Engineering Science («Stability and Transport of Graphene Oxide Nanoparticles in Groundwater and Surface Water»), explained to Nanoclast in an email interview: «Other studies have looked at ideal lab conditions that do not necessarily reflect the conditions one might find in aquatic environments.