Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > ‘White graphene’ halts rust in high temps: Rice U. researchers find nano-thin films of hexagonal boron nitride protect materials from oxidizing

Rice University researchers have discovered that sheets of hexagonal boron nitride (h-BN) as little as one atom thick can protect metals in harsh environments at up to 1,100 degrees Celsius. The top image shows uncoated nickel oxidized after exposure to high temperature in an oxygen-rich environment. The second shows nickel exposed to the same conditions with a 5-nanometer coat of h-BN. The third shows electron microscope images of two, three, four and many-layer h-BN films. The bottom image of an h-BN sheet shows the hexagonal arrangement of nitrogen (bright) and boron atoms. Images by Zheng Liu
Rice University researchers have discovered that sheets of hexagonal boron nitride (h-BN) as little as one atom thick can protect metals in harsh environments at up to 1,100 degrees Celsius. The top image shows uncoated nickel oxidized after exposure to high temperature in an oxygen-rich environment. The second shows nickel exposed to the same conditions with a 5-nanometer coat of h-BN. The third shows electron microscope images of two, three, four and many-layer h-BN films. The bottom image of an h-BN sheet shows the hexagonal arrangement of nitrogen (bright) and boron atoms.

Images by Zheng Liu

Abstract:
Atomically thin sheets of hexagonal boron nitride (h-BN) have the handy benefit of protecting what's underneath from oxidizing even at very high temperatures, Rice University researchers have discovered.

‘White graphene’ halts rust in high temps: Rice U. researchers find nano-thin films of hexagonal boron nitride protect materials from oxidizing

Houston, TX | Posted on October 6th, 2013

One or several layers of the material sometimes called "white graphene" keep materials from oxidizing - or rusting — up to 1,100 degrees Celsius (2,012 degrees Fahrenheit), and can be made large enough for industrial applications, they said.

The Rice study led by materials scientists Pulickel Ajayan and Jun Lou appears in the online journal Nature Communications.

Oxidation prevention is already big business, but no products available now work on the scale of what the Rice lab is proposing. The researchers see potential for very large sheets of h-BN only a few atoms thick made by scalable vapor deposition methods.

"We think this opens up new opportunities for two-dimensional material," said Lou, an associate professor of mechanical engineering and materials science. "Everybody has been talking about these materials for electronic or photonic devices, but if this can be realized on a large scale, it's going to cover a broad spectrum of applications."

Lou said ultrathin h-BN protection might find a place in turbines, jet engines, oil exploration or underwater or other harsh environments where minimal size and weight would be an advantage, though wear and abrasion could become an issue and optimum thicknesses need to be worked out for specific applications.

It's effectively invisible as well, which may make it useful for protecting solar cells from the elements, he said. "Essentially, this can be a very useful structural material coating," Lou said.

The researchers made small sheets of h-BN via chemical vapor deposition (CVD), a process they said should be scalable for industrial production. They first grew the thin material on nickel foil and found it withstood high temperature in an oxygen-rich environment. They also grew h-BN on graphene and found they could transfer sheets of h-BN to copper and steel with similar results.

"What's amazing is that these layers are ultrathin and they stand up to such ultrahigh temperatures," Ajayan said. "At a few nanometers wide, they're a totally non-invasive coating. They take almost no space at all."

Lead authors are Rice postdoctoral researcher Zheng Liu and graduate student Yongji Gong. Co-authors are Rice graduate student Lulu Ma and Senior Faculty Fellow Robert Vajtai; Wu Zhou, a Wigner Fellow, and Juan Carlos Idrobo, a staff scientist at Oak Ridge National Laboratory; Jingjiang Yu of Agilent Technologies; Jeil Jung, a research fellow at the National University of Singapore and a postdoctoral researcher at the University of Texas at Austin; and Allan MacDonald, the Sid W. Richardson Foundation Regents Chair Professor at the University of Texas at Austin. Ajayan is the Benjamin M. and Mary Greenwood Anderson Professor in Mechanical Engineering and Materials Science and of chemistry at Rice.

The Army Research Office, the Office of Naval Research, the Welch Foundation, the Korean Institute of Machinery and Materials, the National Science Foundation, Oak Ridge National Laboratory and the Department of Energy supported the research.

####

For more information, please click here

Contacts:
Mike Williams
senior media relations specialist
713-348-6728

Copyright © Rice University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Study reveals how herpes virus tricks the immune system February 5th, 2016

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

Laboratories

Scientists guide gold nanoparticles to form 'diamond' superlattices: DNA scaffolds cage and coax nanoparticles into position to form crystalline arrangements that mimic the atomic structure of diamond February 4th, 2016

Polar vortices observed in ferroelectric: New state of matter holds promise for ultracompact data storage and processing February 4th, 2016

Putting silicon 'sawdust' in a graphene cage boosts battery performance: Approach could remove major obstacles to increasing the capacity of lithium-ion batteries January 30th, 2016

Graphene/ Graphite

Nature Materials: Smallest lattice structure worldwide: 3-D lattice with glassy carbon struts and braces of less than 200 nm in diameter has higher specific strength than most solids February 3rd, 2016

Nanosheet growth technique could revolutionize nanomaterial production February 1st, 2016

Graphene shown to safely interact with neurons in the brain January 31st, 2016

Govt.-Legislation/Regulation/Funding/Policy

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

Scientists guide gold nanoparticles to form 'diamond' superlattices: DNA scaffolds cage and coax nanoparticles into position to form crystalline arrangements that mimic the atomic structure of diamond February 4th, 2016

Polar vortices observed in ferroelectric: New state of matter holds promise for ultracompact data storage and processing February 4th, 2016

Discoveries

Study reveals how herpes virus tricks the immune system February 5th, 2016

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

Joint Efforts by Iranian, Malaysian Scientists Produce Antibacterial Coatings for Isolated Areas February 4th, 2016

Materials/Metamaterials

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

February 4th, 2016

Announcements

Study reveals how herpes virus tricks the immune system February 5th, 2016

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Study reveals how herpes virus tricks the immune system February 5th, 2016

Hepatitis virus-like particles as potential cancer treatment February 5th, 2016

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Researchers discover new phase of boron nitride and a new way to create pure c-BN February 5th, 2016

Military

Scientists guide gold nanoparticles to form 'diamond' superlattices: DNA scaffolds cage and coax nanoparticles into position to form crystalline arrangements that mimic the atomic structure of diamond February 4th, 2016

Researchers develop completely new kind of polymer: Hybrid polymers could lead to new concepts in self-repairing materials, drug delivery and artificial muscles January 30th, 2016

Nano-coating makes coaxial cables lighter: Rice University scientists replace metal with carbon nanotubes for aerospace use January 28th, 2016

Scientists build a neural network using plastic memristors: A group of Russian and Italian scientists have created a neural network based on polymeric memristors -- devices that can potentially be used to build fundamentally new computers January 28th, 2016

Aerospace/Space

Researchers develop completely new kind of polymer: Hybrid polymers could lead to new concepts in self-repairing materials, drug delivery and artificial muscles January 30th, 2016

Scientists build a neural network using plastic memristors: A group of Russian and Italian scientists have created a neural network based on polymeric memristors -- devices that can potentially be used to build fundamentally new computers January 28th, 2016

Deep Space Industries teams with UTIAS Space Flight Laboratory to demonstrate autonomous spacecraft maneuvering: SFL and DSI demonstrate enabling technology for low-cost asteroid missions and constellations January 25th, 2016

Graphene composite may keep wings ice-free: Rice University develops conductive material to heat surfaces, simplify ice removal January 25th, 2016

Industrial

Nature Materials: Smallest lattice structure worldwide: 3-D lattice with glassy carbon struts and braces of less than 200 nm in diameter has higher specific strength than most solids February 3rd, 2016

New sensors to combat the proliferation of bacteria in very high-humidity environments January 23rd, 2016

Teijin to Participate in Nano Tech 2016 January 21st, 2016

Corrosion-Fighter Tesla NanoCoatings Pioneers 2x1 Wet-on-Wet Process January 20th, 2016

Photonics/Optics/Lasers

Organic crystals allow creating flexible electronic devices: The researchers from the Faculty of Physics of the Moscow State University have grown organic crystals that allow creating flexible electronic devices February 5th, 2016

Scientists guide gold nanoparticles to form 'diamond' superlattices: DNA scaffolds cage and coax nanoparticles into position to form crystalline arrangements that mimic the atomic structure of diamond February 4th, 2016

Nature Materials: Smallest lattice structure worldwide: 3-D lattice with glassy carbon struts and braces of less than 200 nm in diameter has higher specific strength than most solids February 3rd, 2016

Silicon-based metamaterials could bring photonic circuits February 1st, 2016

Research partnerships

Polar vortices observed in ferroelectric: New state of matter holds promise for ultracompact data storage and processing February 4th, 2016

Spin dynamics in an atomically thin semi-conductor February 1st, 2016

Graphene shown to safely interact with neurons in the brain January 31st, 2016

Are some people more likely to develop adverse reactions to nanoparticle-based medicines? January 31st, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic