Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

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

A new, tunable device for spintronics: An international team of scientists including physicist Jairo Sinova from the University of Mainz realises a tunable spin-charge converter made of GaAs August 29th, 2014

Nanoscale assembly line August 29th, 2014

New analytical technology reveals 'nanomechanical' surface traits August 29th, 2014

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

Copper shines as flexible conductor August 29th, 2014

Display technology/LEDs/SS Lighting/OLEDs

Copper shines as flexible conductor August 29th, 2014

LEDs made from ‘wonder material’ perovskite: Colourful LEDs made from a material known as perovskite could lead to LED displays which are both cheaper and easier to manufacture in future August 5th, 2014

Martini Tech Inc. becomes the exclusive distributor for Yoshioka Seiko Co. porous chucks for Europe and North America July 20th, 2014

Possible Futures

Air Force’s 30-year plan seeks 'strategic agility' August 1st, 2014

IBM Announces $3 Billion Research Initiative to Tackle Chip Grand Challenges for Cloud and Big Data Systems: Scientists and engineers to push limits of silicon technology to 7 nanometers and below and create post-silicon future July 10th, 2014

Virus structure inspires novel understanding of onion-like carbon nanoparticles April 10th, 2014

Local girl does good March 22nd, 2014

Academic/Education

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

RMIT delivers $30m boost to micro and nano-tech August 26th, 2014

SEMATECH and Newly Merged SUNY CNSE/SUNYIT Launch New Patterning Center to Further Advance Materials Development: Center to Provide Access to Critical Tools that Support Semiconductor Technology Node Development August 7th, 2014

Oxford Instruments Asylum Research and the Center for Nanoscale Systems at Harvard University Present a Workshop on AFM Nanomechanical and Nanoelectrical Characterization, Aug. 21-22 August 6th, 2014

Chip Technology

New analytical technology reveals 'nanomechanical' surface traits August 29th, 2014

Fonon Announces 3D Metal Sintering Technology: Emerging Additive Nano Powder Manufacturing Technology August 28th, 2014

RMIT delivers $30m boost to micro and nano-tech August 26th, 2014

Competition for Graphene: Berkeley Lab Researchers Demonstrate Ultrafast Charge Transfer in New Family of 2D Semiconductors August 26th, 2014

Nanoelectronics

Competition for Graphene: Berkeley Lab Researchers Demonstrate Ultrafast Charge Transfer in New Family of 2D Semiconductors August 26th, 2014

A*STAR and industry form S$200M semiconductor R&D July 25th, 2014

A Crystal Wedding in the Nanocosmos July 23rd, 2014

3-D nanostructure could benefit nanoelectronics, gas storage: Rice U. researchers predict functional advantages of 3-D boron nitride July 15th, 2014

Announcements

A new, tunable device for spintronics: An international team of scientists including physicist Jairo Sinova from the University of Mainz realises a tunable spin-charge converter made of GaAs August 29th, 2014

Nanoscale assembly line August 29th, 2014

New analytical technology reveals 'nanomechanical' surface traits August 29th, 2014

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

Solar/Photovoltaic

Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices August 28th, 2014

Competition for Graphene: Berkeley Lab Researchers Demonstrate Ultrafast Charge Transfer in New Family of 2D Semiconductors August 26th, 2014

Eco-friendly 'pre-fab nanoparticles' could revolutionize nano manufacturing: UMass Amherst team invents a way to create versatile, water-soluble nano-modules August 13th, 2014

An Inkjet-Printed Field-Effect Transistor for Label-Free Biosensing August 11th, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE