Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

'Gyroscope' molecules form crystal that's both solid and full of motion: New type of molecular machine designed by UCLA researchers could have wide-ranging applications in technology and science January 16th, 2018

The nanoscopic structure that locks up our genes January 16th, 2018

New exotic phenomena seen in photonic crystals: Researchers observe, for the first time, topological effects unique to an “open” system January 12th, 2018

Nanotube fibers in a jiffy: Rice University lab makes short nanotube samples by hand to dramatically cut production time January 11th, 2018

Graphene/ Graphite

Study boosts hope for cheaper fuel cells: Rice University researchers show how to optimize nanomaterials for fuel-cell cathodes January 6th, 2018

Electronically-smooth '3-D graphene': A bright future for trisodium bismuthide: Electronically-smooth nature of trisodium bismuthide makes it a viable alternative to graphene/h-BN December 22nd, 2017

Study resolves controversy about electron structure of defects in graphene December 21st, 2017

Columbia engineers create artificial graphene in a nanofabricated semiconductor structure: Researchers are the first to observe the electronic structure of graphene in an engineered semiconductor; finding could lead to progress in advanced optoelectronics and data processing December 13th, 2017

UCLA chemists synthesize narrow ribbons of graphene using only light and heat: Tiny structures could be next-generation solution for smaller electronic devices December 8th, 2017

Hardware

UCLA chemists synthesize narrow ribbons of graphene using only light and heat: Tiny structures could be next-generation solution for smaller electronic devices December 8th, 2017

Leti Integrates Hybrid III-V Silicon Lasers on 200mm Wafers with Standard CMOS Process December 6th, 2017

Leti Breakthroughs Point Way to Significant Improvements in SoC Memories December 6th, 2017

Govt.-Legislation/Regulation/Funding/Policy

'Gyroscope' molecules form crystal that's both solid and full of motion: New type of molecular machine designed by UCLA researchers could have wide-ranging applications in technology and science January 16th, 2018

The nanoscopic structure that locks up our genes January 16th, 2018

New exotic phenomena seen in photonic crystals: Researchers observe, for the first time, topological effects unique to an “open” system January 12th, 2018

'Decorated' stem cells could offer targeted heart repair January 11th, 2018

Chip Technology

'Gyroscope' molecules form crystal that's both solid and full of motion: New type of molecular machine designed by UCLA researchers could have wide-ranging applications in technology and science January 16th, 2018

New oxide and semiconductor combination builds new device potential: Researchers integrated oxide two-dimensional electron gases with gallium arsenide and paved the way toward new opto-electrical devices January 10th, 2018

STMicroelectronics Selects GLOBALFOUNDRIES 22FDX® to Extend Its FD-SOI Platform and Technology Leadership : GF’s FDX technology will enable ST to deliver high-performance, low-power products for next-generation consumer and industrial applications January 9th, 2018

Touchy nanotubes work better when clean: Rice, Swansea scientists show that decontaminating nanotubes can simplify nanoscale devices January 4th, 2018

Discoveries

'Gyroscope' molecules form crystal that's both solid and full of motion: New type of molecular machine designed by UCLA researchers could have wide-ranging applications in technology and science January 16th, 2018

The nanoscopic structure that locks up our genes January 16th, 2018

New exotic phenomena seen in photonic crystals: Researchers observe, for the first time, topological effects unique to an “open” system January 12th, 2018

'Decorated' stem cells could offer targeted heart repair January 11th, 2018

Announcements

'Gyroscope' molecules form crystal that's both solid and full of motion: New type of molecular machine designed by UCLA researchers could have wide-ranging applications in technology and science January 16th, 2018

The nanoscopic structure that locks up our genes January 16th, 2018

New exotic phenomena seen in photonic crystals: Researchers observe, for the first time, topological effects unique to an “open” system January 12th, 2018

'Decorated' stem cells could offer targeted heart repair January 11th, 2018

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

'Gyroscope' molecules form crystal that's both solid and full of motion: New type of molecular machine designed by UCLA researchers could have wide-ranging applications in technology and science January 16th, 2018

The nanoscopic structure that locks up our genes January 16th, 2018

'Decorated' stem cells could offer targeted heart repair January 11th, 2018

Nanotube fibers in a jiffy: Rice University lab makes short nanotube samples by hand to dramatically cut production time January 11th, 2018

Military

New exotic phenomena seen in photonic crystals: Researchers observe, for the first time, topological effects unique to an “open” system January 12th, 2018

Nanotube fibers in a jiffy: Rice University lab makes short nanotube samples by hand to dramatically cut production time January 11th, 2018

Ultrafine fibers have exceptional strength: New technique developed at MIT could produce strong, resilient nanofibers for many applications January 5th, 2018

NRL improves optical efficiency in nanophotonic devices January 4th, 2018

Photonics/Optics/Lasers

New exotic phenomena seen in photonic crystals: Researchers observe, for the first time, topological effects unique to an “open” system January 12th, 2018

New oxide and semiconductor combination builds new device potential: Researchers integrated oxide two-dimensional electron gases with gallium arsenide and paved the way toward new opto-electrical devices January 10th, 2018

NRL improves optical efficiency in nanophotonic devices January 4th, 2018

Ocean Optics Grows Sales Organization with Executive Appointments: Henry Langston promoted, Christine Stannard joins spectral sensing product developer December 23rd, 2017

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