Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Pressure probing potential photoelectronic manufacturing compound

Abstract:
Molybdenum disulfide is a compound often used in dry lubricants and in petroleum refining. Its semiconducting ability and similarity to the carbon-based graphene makes molybdenum disulfide of interest to scientists as a possible candidate for use in the manufacture of electronics, particularly photoelectronics.

Pressure probing potential photoelectronic manufacturing compound

Washington, DC | Posted on July 31st, 2014

New work from a team including several Carnegie scientists reveals that molybdenum disulfide becomes metallic under intense pressure. It is published in Physical Review Letters.

Molybdenum disulfide crystalizes in a layered structure, with a sheet of molybdenum atoms sandwiched between sheets of sulfur atoms. But it was theorized that changing this structure, without inducing impurities into it, could turn it into a metal. That is, a structural transition might enable electrons to flow smoothly.

The team—including Carnegie's Alexander Goncharov, Haidong Zhang, Sergey Lobanov, and Xiao-Jia Chen—found a way to induce this metallic state by putting molybdenum disulfide under pressure in diamond anvil cells.

They found that molybdenum disulfide underwent structural changes as the pressure increased, and the compound began changing into a new phase. The team was able to determine that these changes were due to lateral shifting of the layers of molybdenum and sulfur.

This process started above 197,000 times normal atmospheric pressure (20 gigapascals), under which the new phase and interlayer stacking arrangement starts to appear and exist in conjunction with the old phase. The complete takeover of the new phase occurs at around 395,000 times normal atmospheric pressure (40 gigapascals), after which the compound became metallic.

They found that all of these changes were reversible when the pressure was decreased again.

"More work is needed to determine whether application of further pressure could yield superconductivity, a rare physical state in which mater is able to maintain a flow of electrons without any resistance at all," Goncharov said.

The rest of the team is comprised of lead author Zhen-Hua Chi of the Chinese Academy of Sciences, co-author Xiao-Miao Zhao of the Center for High Pressure Science and Technology Advanced Research and South China University of Techonology, and co-authors Tomoko Kagayama and Masafumi Sakata of Osaka University.

###

This work was supported by the Natural Science Foundation of China, the Cultivation Fund of the Key Scientific and Technical Innovation Project Ministry of Education of China, SASHIPS, the NSF, EAR, and DARPA

####

About Carnegie Institution
The Carnegie Institution for Science is a private, nonprofit organization headquartered in Washington, D.C., with six research departments throughout the U.S. Since its founding in 1902, the Carnegie Institution has been a pioneering force in basic scientific research. Carnegie scientists are leaders in plant biology, developmental biology, astronomy, materials science, global ecology, and Earth and planetary science.

For more information, please click here

Contacts:
Alex Goncharov

202-478-8947

Copyright © Carnegie Institution

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

Host-guest nanowires for efficient water splitting and solar energy storage February 7th, 2016

UTHealth research looks at nanotechnology to help prevent preterm birth February 7th, 2016

Graphene is strong, but is it tough? Berkeley Lab scientists find that polycrystalline graphene is not very resistant to fracture February 7th, 2016

Lithium battery catalyst found to harm key soil microorganism February 7th, 2016

Discovery of the specific properties of graphite-based carbon materials February 6th, 2016

Graphene/ Graphite

Graphene is strong, but is it tough? Berkeley Lab scientists find that polycrystalline graphene is not very resistant to fracture February 7th, 2016

Discovery of the specific properties of graphite-based carbon materials February 6th, 2016

Hardware

Discovery of the specific properties of graphite-based carbon materials February 6th, 2016

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

Govt.-Legislation/Regulation/Funding/Policy

Host-guest nanowires for efficient water splitting and solar energy storage February 7th, 2016

Lithium battery catalyst found to harm key soil microorganism February 7th, 2016

Scientists take key step toward custom-made nanoscale chemical factories: Berkeley Lab researchers part of team that creates new function in tiny protein shell structures February 6th, 2016

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

Chip Technology

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

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

Electrons and liquid helium advance understanding of zero-resistance: Study of electrons on liquid helium systems sheds light on zero-resistance phenomenon in semiconductors February 2nd, 2016

Discoveries

Host-guest nanowires for efficient water splitting and solar energy storage February 7th, 2016

UTHealth research looks at nanotechnology to help prevent preterm birth February 7th, 2016

Graphene is strong, but is it tough? Berkeley Lab scientists find that polycrystalline graphene is not very resistant to fracture February 7th, 2016

Lithium battery catalyst found to harm key soil microorganism February 7th, 2016

Announcements

Host-guest nanowires for efficient water splitting and solar energy storage February 7th, 2016

UTHealth research looks at nanotechnology to help prevent preterm birth February 7th, 2016

Graphene is strong, but is it tough? Berkeley Lab scientists find that polycrystalline graphene is not very resistant to fracture February 7th, 2016

Lithium battery catalyst found to harm key soil microorganism February 7th, 2016

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

Host-guest nanowires for efficient water splitting and solar energy storage February 7th, 2016

UTHealth research looks at nanotechnology to help prevent preterm birth February 7th, 2016

Graphene is strong, but is it tough? Berkeley Lab scientists find that polycrystalline graphene is not very resistant to fracture February 7th, 2016

Lithium battery catalyst found to harm key soil microorganism February 7th, 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

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

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