A new era of electronics and even quantum devices could be ushered in with the fabrication of a virtually perfect single layer of “white graphene,” according to researchers at the Department of Energy’s Oak Ridge National Laboratory.
The material, technically known as hexagonal boron nitride, features better transparency than its sister, graphene, is chemically inert, or non-reactive, and atomically smooth. It also features high mechanical strength and thermal conductivity. Unlike graphene, however, it is an insulator instead of a conductor of electricity, making it useful as a substrate and the foundation for the electronics in cell phones, laptops, tablets and many other devices.
“Imagine batteries, capacitors, solar cells, video screens and fuel cells as thin as a piece of paper,” said ORNL’s Yijing Stehle, postdoctoral associate and lead author of a paper published in Chemistry of Materials. She and colleagues are also working on a graphene hexagonal boron 2-D capacitor and fuel cell prototype that are not only “super thin” but also transparent.
With their recipe for white graphene, ORNL researchers hope to unleash the full potential of graphene, which has not delivered performance consistent with its theoretical value. With white graphene as a substrate, researchers believe they can help solve the problem while further reducing the thickness and increasing the flexibility of electronic devices.
While graphene, which is stronger and stiffer than carbon fiber, is a promising material for data transfer devices, graphene on a white graphene substrate features several thousand times higher electron mobility than graphene on other substrates. That feature could enable data transfers that are much faster than what is available today. “Imagine your message being sent thousands of times faster,” Stehle said.
Stehle noted that this work is especially significant because it takes the material beyond theory. A recent theoretical study (http://news.rice.edu/2015/07/15/white-graphene-structures-can-take-the-heat/) led by Rice University, for instance, proposed the use of white graphene to cool electronics. Stehle and colleagues have made high-quality layers of hexagonal boron nitride they believe can be cost-effectively scaled up to large production volumes.
“Various hexagonal boron nitride single crystal morphology – triangle to hexagon – formulations have been mentioned in theoretical studies, but for the first time we have demonstrated and explained the process,” Stehle said.
That process consists of standard atmospheric pressure chemical vapor deposition with a similar furnace, temperature and time, but there’s a twist. The difference is what Stehle describes as “a more gentle, controllable way to release the reactant into the furnace and figuring out how to take advantage of inner furnace conditions. These two factors are almost always neglected.”
Stehle continued: “I just thought carefully beforehand and was curious. For example, I remind myself that there are many conditions in this experiment that can be adjusted and could make a difference. Whenever I see non-perfect results, I do not count them as another failure but, instead, another condition adjustment to be made. This ‘failure’ may become valuable.”
The Latest on: White graphene
via Google News
The Latest on: White graphene
- Electricity turns garbage into high-quality grapheneon January 30, 2020 at 10:57 am
Initially he got junk. But after tweaks, he saw a yellowish white flash, indicating the temperature in the vial was about 3000 kelvins. Chemical tests revealed he had produced graphene. It was a type ...
- Electricity turns garbage into grapheneon January 27, 2020 at 10:23 am
“I wondered if I could use that to heat a carbon source and produce graphene,” Duy says. So, he put a dash of carbon black in a clear glass vial and zapped it with 400 volts for about 200 milliseconds ...
- Nokia Power Earbuds BH-605 reviewon January 26, 2020 at 7:01 am
The cap feels a tad flimsy and it's held by a strong magnet to keep it tightly closed. Once opened, you will see four white LEDs that indicate the charge of the case. One of the most impressive things ...
- Graphene Ready To Conquer The Terahertz Terrainon January 16, 2020 at 4:00 pm
Korean chipmaker Samsung predicts that the first graphene-based devices will appear in 2014. Read this Rochester Electronics white paper to learn about their design replication process which ...
- A bit of white graphene could give ceramics extra powerson January 10, 2020 at 4:00 pm
Bilayer white graphene (middle layer) combined with calcium-silicate creates a multifunctional ceramic with high strength and toughness. (Credit: Rouzbeh Shahsavari) Combining the materials would ...
- 'Magic' Angle Graphene Is BACK...With An Even Bigger Twiston January 6, 2020 at 1:50 pm
Elements is more than just a science show. It’s your science-loving best friend, tasked with keeping you updated and interested on all the compelling, innovative and groundbreaking science happening ...
- Global Graphene Market Outlook, 2019-2030, Featuring 200+ Company Profiles and Detailed Forecasts for Key Growth Areas, Opportunities & User Demandon December 30, 2019 at 1:23 pm
DUBLIN, Dec. 30, 2019 /PRNewswire/ -- The "The Global Market for Graphene" report has been added to ResearchAndMarkets.com's offering. The Global Market for Graphene provides a complete analysis ...
- Real-time imagingofadatom-promotedon December 25, 2019 at 4:00 pm
1.Graphene growth along z and k edges ... I = 8 nA; frame rate = 36.5 Hz].White arrows indicate the position of C atoms in fcc-hollow sites near the kink. (C) Same as in (B) but for the k edge, from ...
- Graphene Could Save One of the World's Coolest Buildingson December 25, 2019 at 6:51 am
Now, a company selling graphene paint wants to save it ... detail on the opera house's curving facade caused masses of white tiles to peel off and fall away during high winds.
- Proof of a decades-old theory hides in the thinnest of materialson December 18, 2019 at 1:33 am
Using hexagonal boron nitride (hBN), sometimes known as white graphene, the study shows that, electrons could pass through the hBN acting as a barrier between a graphite electrode and suitable ...
via Bing News