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

Scientists refine formula for nanotube types: Rice University theorists determine factors that give tubes their chiral angles September 17th, 2014

New non-invasive technique could revolutionize the imaging of metastatic cancer September 17th, 2014

Toward making lithium-sulfur batteries a commercial reality for a bigger energy punch September 17th, 2014

Recruiting bacteria to be technology innovation partners: September 17th, 2014

Display technology/LEDs/SS Lighting/OLEDs

'Squid skin' metamaterials project yields vivid color display: Rice lab creates RGB color display technology with aluminum nanorods September 15th, 2014

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

Malvern technology delivers Malvern reliability in multi-disciplinary lab at Queen Mary University London September 9th, 2014

State University of New York Trustees Unanimously Approve SUNY Polytechnic Institute (SUNY Poly) as New Name for Merged SUNY CNSE / SUNYIT September 9th, 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

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

Chip Technology

‘Small’ transformation yields big changes September 16th, 2014

UT Arlington research uses nanotechnology to help cool electrons with no external sources September 11th, 2014

Excitonic Dark States Shed Light on TMDC Atomic Layers: Berkeley Lab Discovery Holds Promise for Nanoelectronic and Photonic Applications September 11th, 2014

Researchers Create World’s Largest DNA Origami September 11th, 2014

Nanoelectronics

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Excitonic Dark States Shed Light on TMDC Atomic Layers: Berkeley Lab Discovery Holds Promise for Nanoelectronic and Photonic Applications September 11th, 2014

Researchers Create World’s Largest DNA Origami September 11th, 2014

Material development on the nanoscale: Doped graphene nanoribbons with potential September 8th, 2014

Announcements

New NPZ100-403 Piezo Stage from nPoint Inc. September 17th, 2014

Scientists refine formula for nanotube types: Rice University theorists determine factors that give tubes their chiral angles September 17th, 2014

New non-invasive technique could revolutionize the imaging of metastatic cancer September 17th, 2014

Toward making lithium-sulfur batteries a commercial reality for a bigger energy punch September 17th, 2014

Solar/Photovoltaic

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

Indium/Copper Sulfide Compound Semi-Conductor Synthesized through New Method September 8th, 2014

Material development on the nanoscale: Doped graphene nanoribbons with potential September 8th, 2014

Layered graphene sandwich for next generation electronics September 8th, 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