Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Graphite oxide at high pressure opens a road to new amazing nano-materials

Abstract:
New results by scientists at Umeć University show that not only water but also alcohol solvents can be inserted to expand the structure of graphite oxide under high pressure conditions. The information is helpful in the search for new methods to develop amazing materials that could be used for instance in nanoelectronics and for energy storage.

Graphite oxide at high pressure opens a road to new amazing nano-materials

Sweden | Posted on December 21st, 2009

Graphite oxide has a layered structure like common graphite, used in pencils, but with increased distance between the layers. It also has a unique ability to incorporate various solvents between the layers. Even after 150 years of studies the structure of graphite oxide remains to be somewhat of a mystery.

The interest in graphite oxide has recently been heated up due to the possibility to convert it to graphene - a sheet of carbon only one atom thick. Graphene has the potential to serve as the basis of an entirely new class of materials, which are ultra-strong yet lightweight. The extraordinary materials could for instance be used for nanoelectronics, in solar cells, for preparation of exceptionally strong paper, and to improve fuel efficiency in cars and airplanes. Graphite oxide can be converted into graphene by moderate heating and even by a flash from a usual camera. An alternative method is chemical treatment of graphite oxide dispersed in solution. To make conversion of graphite oxide to graphene more efficient researchers need to know detailed information about the structure of graphite oxide, including its structure in solution at various conditions.

"We have found a range of new phenomena for graphite oxide at high pressure conditions. This gives additional possibilities to develop new composite graphene-related materials using high pressure treatment and to modify graphite oxide chemically. Clearly, we can insert larger molecules between graphite oxide layers due to the expansion of the lattice at high pressure conditions. Also, when layers of graphite oxide are separated by several layers of solvent it is more likely that they will stay separated after reduction thus preventing formation of graphite and assisting the synthesis of graphene", says Dr Alexandr Talyzin.

Last year an international team of scientists from Sweden, Hungary, Germany and France reported an unusual property of graphite oxide: the structure expanded under high pressure conditions due to insertion of liquid water. The new study lead by scientists from Umeć University and performed at the Swiss-Norwegian beamline (ESRF, Grenoble) reports that not only water but also alcohol solvents (methanol and ethanol) can be inserted between oxidized graphene layers under high pressure conditions.

"However, it happens in a very different way compared to when water is inserted under high pressure. Alcohol is inserted in a single step as a complete layer in the structure at a certain pressure while water insertion occurs gradually, without clear steps", says dr Alexandr Talyzin.
Experiments with methanol and water mixtures proved that water between the layers of graphite oxide is in the liquid state and remains to be liquid even when bulk water solidifies around grains of the material.

"The extra amount of water and methanol is also released from the structure when the pressure decreases, which results in a unique structural "breathing" effect. It is also remarkable that for ethanol the high pressure expanded structure was observed even after full release of pressure", says Dr Alexandr Talyzin.

The experiments were performed using diamond anvil cells, which allow to squeeze tiny samples up to very high pressures and to study phase transformations using X-ray diffraction through diamonds.
The new results are published in J. Am. Chem. Soc by Alexandr V. Talyzin, Bertil Sundqvist, (Sweden), Tamás Szabó, Imre Dekany (Hungary) and Vladimir Dmitriev (France).

pubs.acs.org/doi/full/10.1021/ja907492s

####

About Umeć University
Umeć University was founded in 1965 and is Sweden's fifth oldest university. Today, we have a strong international and multicultural presence with students, teachers and researchers from all over the world. Our main campus - with its 29,000 students and 4,000 employees - is alive with enthusiasm, creativity and fresh ideas.

We constantly strive towards making it one of Scandinavia's best environments for study and research that meets the challenges of an ever-increasing global society.

For more information, please click here

Contacts:
Dr Alexandr Talyzin, Department of Physics, Umeć University,
Phone: +46 (0)90-786 63 20

Copyright © Umeć University

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

Nano Ruffles in Brain Matter: Freiburg researchers decipher the role of nanostructures around brain cells in central nervous system function October 31st, 2014

Gold nanoparticle chains confine light to the nanoscale October 31st, 2014

'Nanomotor lithography' answers call for affordable, simpler device manufacturing October 31st, 2014

Device invented at Johns Hopkins provides up-close look at cancer on the move: Microscopic view of metastasis could give insight about how to keep cancer in check October 31st, 2014

Possible Futures

Imaging electric charge propagating along microbial nanowires October 20th, 2014

Superconducting circuits, simplified: New circuit design could unlock the power of experimental superconducting computer chips October 18th, 2014

Nanocoatings Market By Product Is Expected To Reach USD 8.17 Billion By 2020: Grand View Research, Inc. October 15th, 2014

Perpetuus Carbon Group Receives Independent Verification of its Production Capacity for Graphenes at 140 Tonnes per Annum: Perpetuus Becomes the First Manufacturer in the Sector to Allow Third Party Audit October 7th, 2014

Nanoelectronics

Breakthrough in molecular electronics paves the way for DNA-based computer circuits in the future: DNA-based programmable circuits could be more sophisticated, cheaper and simpler to make October 27th, 2014

NIST offers electronics industry 2 ways to snoop on self-organizing molecules October 22nd, 2014

Materials for the next generation of electronics and photovoltaics: MacArthur Fellow develops new uses for carbon nanotubes October 21st, 2014

Crystallizing the DNA nanotechnology dream: Scientists have designed the first large DNA crystals with precisely prescribed depths and complex 3D features, which could create revolutionary nanodevices October 20th, 2014

Announcements

Nano Ruffles in Brain Matter: Freiburg researchers decipher the role of nanostructures around brain cells in central nervous system function October 31st, 2014

Gold nanoparticle chains confine light to the nanoscale October 31st, 2014

'Nanomotor lithography' answers call for affordable, simpler device manufacturing October 31st, 2014

Device invented at Johns Hopkins provides up-close look at cancer on the move: Microscopic view of metastasis could give insight about how to keep cancer in check October 31st, 2014

Energy

Gold nanoparticle chains confine light to the nanoscale October 31st, 2014

Iranians Present Model to Predict Photocatalytic Process in Removal of Pollutants October 30th, 2014

New solar power material converts 90 percent of captured light into heat: SunShot Project aims to make solar cost competitive October 29th, 2014

New Compact SIMS at 61st AVS | Visit us on Booth 311 October 28th, 2014

Automotive/Transportation

Production of Anticorrosive Chromate Nanocoatings in Iran September 27th, 2014

Teijin Aramid’s carbon nanotube fibers awarded with Paul Schlack prize: New generation super fibers bring wave of innovations to fiber market September 25th, 2014

Next-Gen Luxury RV From Global Caravan Technologies Will Offer MagicView Roof and Windshield Using SPD-SmartGlass Technology From Research Frontiers: Recreational Vehicle Manufacturer Global Caravan Technologies (GCT) Features 28 Square Feet of MagicView™ SPD-SmartGlass September 17th, 2014

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

Aerospace/Space

New evidence for an exotic, predicted superconducting state October 27th, 2014

Novel Rocket Design Flight Tested: New Rocket Propellant and Motor Design Offers High Performance and Safety October 23rd, 2014

Removal of Limitations of Composites at Superheat Temperatures October 20th, 2014

1980s aircraft helps quantum technology take flight October 20th, 2014

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Super stable garnet ceramics may be ideal for high-energy lithium batteries October 21st, 2014

Graphenea opens US branch October 16th, 2014

NTU develops ultra-fast charging batteries that last 20 years October 14th, 2014

Electrically conductive plastics promising for batteries, solar cells October 10th, 2014

Solar/Photovoltaic

Gold nanoparticle chains confine light to the nanoscale October 31st, 2014

New solar power material converts 90 percent of captured light into heat: SunShot Project aims to make solar cost competitive October 29th, 2014

Advancing thin film research with nanostructured AZO: Innovnano’s unique and cost-effective AZO sputtering targets for the production of transparent conducting oxides October 23rd, 2014

Magnetic mirrors enable new technologies by reflecting light in uncanny ways October 16th, 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