Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > EU-funded team puts new semi-conductor material to the test

Abstract:
The electronic chips of the future might not be made of silicon or even graphene but of a material called molybdenite (MoS2). EU-funded research presented in the journal Nature Nanotechnology demonstrates that molybdenite is a highly effective semi-conductor that could be used to make transistors both smaller and more energy efficient.

EU-funded team puts new semi-conductor material to the test

EU | Posted on February 1st, 2011

EU support for the work came from the 5-year FLATRONICS ('Electronic devices based on nanolayers') project, a EUR 1.8 million European Research Council (ERC) Starting Grant awarded to Professor Andras Kis of the Laboratory of Nanoscale Electronics and Structures (LANES) at the Ecole Polytechnique Fédérale de Lausanne (EPFL) in Switzerland in 2009. ERC grants are channelled through the Ideas Programme of the Seventh Framework Programme (FP7).

Molybdenite is a mineral readily available in nature. Currently its main uses are as an element in steel alloys and as an additive in lubricants. Until now, its potential as a semi-conductor has remained largely unexplored.

'It's a two-dimensional material, very thin and easy to use in nanotechnology,' says Professor Kis, who led the current study. 'It has real potential in the fabrication of very small transistors, light-emitting diodes (LEDs) and solar cells.'

According to Professor Kis and his colleagues, molybdenite offers significant advantages over silicon, which is widely used in electronics, and graphene, which is the most widely studied two-dimensional material and is commonly viewed as the electronics material of the future.

Silicon is a three-dimensional material, and so is more voluminous than molybdenite that can be fabricated in monolayers. 'In a 0.65-nanometre-thick sheet of MoS2, the electrons can move around as easily as in a 2-nanometre-thick sheet of silicon, but it's not currently possible to fabricate a sheet of silicon as thin as a monolayer sheet of MoS2,' explains Professor Kis.

Furthermore, transistors based on molybdenite would consume 100,000 times less energy in their standby state than conventional silicon transistors. This is because turning a transistor on and off requires a semi-conductor material with a 'band gap'. In physics, 'bands' are used as a way of describing the energy of electrons in a material. In semi-conductors, the term 'band gap' refers to the electron-free spaces between these bands. If the gap is neither too big nor too small, some electrons can jump across the gap, thereby offering researchers a way of controlling the electrical behaviour of the material and turning it on and off. Molybdenite has a 1.8 electron-volt band gap, making it ideal for turning transistors on and off.

Molybdenite's band gap also gives it the edge over graphene, which does not have a band gap in its pristine state. Although it is possible to make graphene that has a band gap, this increases the fabrication complexity and causes other problems.

'Our results provide an important step towards the realization of electronics and low-standby-power integrated circuits based on two-dimensional materials. Being a thin, transparent semiconducting material, MoS2 monolayers also present a wealth of new opportunities in areas that include mesoscopic physics, optoelectronics and energy harvesting,' the researchers conclude.

'With the possibility of fabricating large-area circuits using solution-based processing, our finding could be important for producing electronic devices that could combine the ease of processing associated with organic conductors with performance figures commonly associated with silicon-based electronics.'

For more information, please visit:

Ecole Polytechnique Fédérale de Lausanne (EPFL): www.epfl.ch

Nature Nanotechnology: www.nature.com/naturenanotechnology

European Research Council (ERC): erc.europa.eu

####

For more information, please click here

Copyright © CORDIS

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

Halas wins American Chemical Society Award in Colloid Chemistry: Rice University nanophotonics pioneer honored for colloid research September 18th, 2018

Leti & EFI Aim to Dramatically Improve Reliability & Speed of Low-Cost Electronic Devices for Autos: Project Will Extend Model Predictive Control Technique to Microcontrollers, Digital Signal Processors and Other Devices that Lack Powerful Computation Capabilities September 18th, 2018

Researchers managed to prevent the disappearing of quantum information September 14th, 2018

Tiny camera lens may help link quantum computers to network September 14th, 2018

Display technology/LEDs/SS Lighting/OLEDs

Environmentally friendly photoluminescent nanoparticles for more vivid display colors: Osaka University-led researchers created a new type of light-emitting nanoparticle that is made of ternary non-toxic semiconductors to help create displays and LED lighting with better colors t August 29th, 2018

Carbon in color: First-ever colored thin films of nanotubes created: A method developed at Aalto University, Finland, can produce large quantities of pristine single-walled carbon nanotubes in select shades of the rainbow; the secret is a fine-tuned fabrication process -- and a s August 29th, 2018

Future electronic components to be printed like newspapers July 20th, 2018

DNA drives design principles for lighter, thinner optical displays: Lighter gold nanoparticles could replace thicker, heavier layered polymers used in displays’ back-reflectors June 27th, 2018

Possible Futures

Halas wins American Chemical Society Award in Colloid Chemistry: Rice University nanophotonics pioneer honored for colloid research September 18th, 2018

Leti & EFI Aim to Dramatically Improve Reliability & Speed of Low-Cost Electronic Devices for Autos: Project Will Extend Model Predictive Control Technique to Microcontrollers, Digital Signal Processors and Other Devices that Lack Powerful Computation Capabilities September 18th, 2018

Researchers managed to prevent the disappearing of quantum information September 14th, 2018

Tiny camera lens may help link quantum computers to network September 14th, 2018

Academic/Education

The Institute of Applied Physics at the University of Tsukuba near Tokyo in Japan uses Deben's ARM2 detector to better understand catalytic reaction mechanisms June 27th, 2018

Powering the 21st Century with Integrated Photonics: UCSB-Led Team Selected for Demonstration of a Novel Waveguide Platform Which is Transparent Throughout the MWIR and LWIR Spectral Bands June 19th, 2018

SUNY Poly Professor Eric Lifshin Selected for ‘Fellow of the Microanalysis Society’ Position for Significant Contributions to Microanalysis June 13th, 2018

Grand Opening of UC Irvine Materials Research Institute (IMRI) to Spotlight JEOL Center for Nanoscale Solutions: Renowned Materials Scientists to Present at the 1st International Symposium on Advanced Microscopy and Spectroscopy (ISAMS) April 18th, 2018

Chip Technology

Researchers managed to prevent the disappearing of quantum information September 14th, 2018

New devices based on rust could reduce excess heat in computers: Physicists explore long-distance information transmission in antiferromagnetic iron oxide September 14th, 2018

New photonic chip promises more robust quantum computers September 14th, 2018

How a tetrahedral substance can be more symmetrical than a spherical atom: A new type of symmetry September 14th, 2018

Nanoelectronics

How a tetrahedral substance can be more symmetrical than a spherical atom: A new type of symmetry September 14th, 2018

Laser sintering optimized for printed electronics: New study sheds (laser) light on the best means of laying down thin-film circuitry September 13th, 2018

September 5th, 2018

Rice U. lab probes molecular limit of plasmonics: Optical effect detailed in organic molecules with fewer than 50 atoms September 5th, 2018

Announcements

Halas wins American Chemical Society Award in Colloid Chemistry: Rice University nanophotonics pioneer honored for colloid research September 18th, 2018

Leti & EFI Aim to Dramatically Improve Reliability & Speed of Low-Cost Electronic Devices for Autos: Project Will Extend Model Predictive Control Technique to Microcontrollers, Digital Signal Processors and Other Devices that Lack Powerful Computation Capabilities September 18th, 2018

New devices based on rust could reduce excess heat in computers: Physicists explore long-distance information transmission in antiferromagnetic iron oxide September 14th, 2018

New photonic chip promises more robust quantum computers September 14th, 2018

Solar/Photovoltaic

September 5th, 2018

NUST MISIS scientists present metamaterial for solar cells and nanooptics July 23rd, 2018

Northwestern researchers achieve unprecedented control of polymer grids: Materials could find applications in water purification, solar energy storage, body armor June 22nd, 2018

Team achieves two-electron chemical reactions using light energy, gold May 15th, 2018

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project