Manchester, UK (SPX) Nov 09, 2010
University of Manchester scientists have created a new material which could replace or compete with Teflon in thousands of everyday applications.
Professor Andre Geim, who along with his colleague Professor Kostya Novoselov won the 2010 Nobel Prize for graphene - the world's thinnest material, has now modified it to make fluorographene - a one-molecule-thick material chemically similar to Teflon.
Fluorographene is fully-fluorinated graphene and is basically a two-dimensional version of Teflon, showing similar properties including chemical inertness and thermal stability.
The results are this week reported in the advanced online issue of the journal Small. The work is a large international effort and involved research groups from China, the Netherlands, Poland and Russia.
The team hope that fluorographene, which is a flat, crystal version of Teflon and is mechanically as strong as graphene, could be used as a thinner, lighter version of Teflon, but could also be in electronics, such as for new types of LED devices.
Graphene, a one-atom-thick material that demonstrates a huge range of unusual and unique properties, has been at the centre of attention since groundbreaking research carried out at The University of Manchester six years ago.
Its potential is almost endless - from ultrafast transistors just one atom thick to sensors that can detect just a single molecule of a toxic gas and even to replace carbon fibres in high performance materials that are used to build aircraft.
Professor Geim and his team have exploited a new perspective on graphene by considering it as a gigantic molecule that, like any other molecule, can be modified in chemical reactions.
Teflon is a fully-fluorinated chain of carbon atoms. These long molecules bound together make the polymer material that is used in a variety of applications including non-sticky cooking pans.
The Manchester team managed to attach fluorine to each carbon atom of graphene..
To get fluorographene, the Manchester researchers first obtained graphene as individual crystals and then fluorinated it by using atomic fluorine.
To demonstrate that it is possible to obtain fluorographene in industrial quantities, the researchers also fluorinated graphene powder and obtained fluorographene paper.
Fluorographene turned out to be a high-quality insulator which does not react with other chemicals and can sustain high temperatures even in air.
One of the most intense directions in graphene research has been to open a gap in graphene's electronic spectrum, that is, to make a semiconductor out of metallic graphene. This should allow many applications in electronics. Fluorographene is found to be a wide gap semiconductor and is optically transparent for visible light, unlike graphene that is a semimetal.
Professor Geim said: "Electronic quality of fluorographene has to be improved before speaking about applications in electronics but other applications are there up for grabs."
Rahul Nair, who led this research for the last two years and is a PhD student working with Professor Geim, added: "Properties of fluorographene are remarkably similar to those of Teflon but this is not a plastic.
"It is essentially a perfect one-molecule-thick crystal and, similar to its parent, fluorographene is also mechanically strong. This makes a big difference for possible applications.
"We plan to use fluorographene an ultra-thin tunnel barrier for development of light-emitting devices and diodes.
"More mundane uses can be everywhere Teflon is currently used, as an ultra-thin protective coating, or as a filler for composite materials if one needs to retain the mechanical strength of graphene but avoid any electrical conductivity or optical opacity of a composite".
Industrial scale production of fluorographene is not seen as a problem as it would involve following the same steps as mass production of graphene.
The Manchester researchers believe that the next important step is to make proof-of-concept devices and demonstrate various applications of fluorographene.
Professor Geim added: "There is no point in using it just as a substitute for Teflon. The mix of the incredible properties of graphene and Teflon is so inviting that you do not need to stretch your imagination to think of applications for the two-dimensional Teflon. The challenge is to exploit this uniqueness."
Share This Article With Planet Earth
University of Manchester
Space Technology News - Applications and Research
Small Materials Poised For Big Impact In Construction
Houston TX (SPX) Nov 08, 2010
Bricks, blocks, and steel I-beams - step aside. A new genre of construction materials, made from stuff barely 1/50,000th the width of a human hair, is about to debut in the building of homes, offices, bridges, and other structures. And a new report is highlighting both the potential benefits of these nanomaterials in improving construction materials and the need for guidelines to regulate ... read more
Kno textbook reader to ship this year|
iPhone triggers videogame gold rush
Graphene Gets A Teflon Makeover
Engineered Plants Make Potential Precursor To Raw Material For Plastics
ManTech Awarded US Army Contract To Provide ECCS In Afghanistan
Hughes Undergoing Wideband Global SATCOM Certification
ORBIT To Supply Tri-Band Telemetry Tracking Systems To Patuxent River USNAWC
Raytheon To Provide Improved Track Correlation And Fusion Capability
Vega P80 First Stage Is Rolled Out To The Spaceport's Vega Launch Facility
Pratt and Whitney Rocketdyne Engine Helps Boost 350th Launch Of A Delta Vehicle
India Plans Two Rocket Launches Next Month
Azerbaijan signs deal with Arianespace to launch satellite
Lockheed Martin Delivers Key GPS III Test Hardware Ahead of Schedule
Few Americans using location-based services: Pew study
GPS maker Garmin hanging up on smartphones
Savi Challenges You To Imagine The Best Wireless Applications
Britain signs jet engine deal with China as PM visits
Flights resume to Indonesia after volcano chaos
Argentina, Brazil to build cargo plane
BOC Aviation orders 30 Airbus A320
Microsoft sues Motorola over 'excessive' royalty demands
Intel opens biggest ever chip plant in Vietnam
Intel to open billion-dollar chip plant in Vietnam
Intel to invest up to 8 billion dollars in US chip plants
China Calls For Improved Earth Observation In Developing Countries
NASA Extends TIMED Mission For Fourth Time
Use Satellites To Know Your Snow
Google Maps embroiled in Central America border dispute
Mangled arms, legs legacy of cluster bombs in Laos
Global talks in Laos seek quicker removal of cluster bombs
Hungary's toxic sludge disaster claims tenth victim
Exposure Of Humans To Cosmetic UV Filters Is Widespread
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|