Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

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

Abstract:
New results by scientists at UmeŚ 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 UmeŚ 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), TamŠs Szabů, Imre Dekany (Hungary) and Vladimir Dmitriev (France).

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

####

About UmeŚ University
UmeŚ 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, UmeŚ University,
Phone: +46 (0)90-786 63 20

Copyright © UmeŚ 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

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Harris & Harris Group Portfolio Company, HZO, Announces Partnerships with Dell and Motorola August 1st, 2015

Advances and Applications in Biosensing, Sensor Power, and Sensor R&D to be Covered at Sensors Global Summit August 1st, 2015

Kalam: versatility personified August 1st, 2015

Possible Futures

Nanofiltration Membrane Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Nanozirconia Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Self-Healing Nano Anti-rust Coatings Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Nano Spray Instrument Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Nanoelectronics

Superfast fluorescence sets new speed record: Plasmonic device has speed and efficiency to serve optical computers July 27th, 2015

Spintronics: Molecules stabilizing magnetism: Organic molecules fixing the magnetic orientation of a cobalt surface/ building block for a compact and low-cost storage technology/ publication in Nature Materials July 25th, 2015

ORNL researchers make scalable arrays of 'building blocks' for ultrathin electronics July 22nd, 2015

An easy, scalable and direct method for synthesizing graphene in silicon microelectronics: Korean researchers grow 4-inch diameter, high-quality, multi-layer graphene on desired silicon substrates, an important step for harnessing graphene in commercial silicon microelectronics July 21st, 2015

Announcements

Self-assembling, biomimetic membranes may aid water filtration August 1st, 2015

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Harris & Harris Group Portfolio Company, HZO, Announces Partnerships with Dell and Motorola August 1st, 2015

Advances and Applications in Biosensing, Sensor Power, and Sensor R&D to be Covered at Sensors Global Summit August 1st, 2015

Energy

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Springer and Tsinghua University Press present the second Nano Research Award: Paul Alivisatos of the University of California Berkeley receives the honor for outstanding contributions in nanoscience July 30th, 2015

Controlling Dynamic Behavior of Carbon Nanosheets in Structures Made Possible July 30th, 2015

March 2016; 6th Int'l Conference on Nanostructures in Iran July 29th, 2015

Automotive/Transportation

Sol-gel capacitor dielectric offers record-high energy storage July 30th, 2015

Controlling Dynamic Behavior of Carbon Nanosheets in Structures Made Possible July 30th, 2015

Ultra-thin hollow nanocages could reduce platinum use in fuel cell electrodes July 24th, 2015

Researchers boost wireless power transfer with magnetic field enhancement July 23rd, 2015

Aerospace/Space

The National Space Society Pays Tribute to Dr. Kalam -- One Of Our Leading Lights Has Joined The Stars August 1st, 2015

Controlling Dynamic Behavior of Carbon Nanosheets in Structures Made Possible July 30th, 2015

UT Dallas nanotechnology research leads to super-elastic conducting fibers July 24th, 2015

Global Aerospace Applications Nanocoatings Industry 2015: Acute Market Reports July 21st, 2015

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

Sol-gel capacitor dielectric offers record-high energy storage July 30th, 2015

Stretching the limits on conducting wires July 25th, 2015

BESSTECHís Innovative Battery Technology is Highlighted During Featured Presentations at SEMICON West 2015: CEO Fernando Gůmez-Baquero delivers invited remarks at the eventís Silicon Innovation Forum and Semiconductor Technology Symposium July 16th, 2015

Molecular fuel cell catalysts hold promise for efficient energy storage July 16th, 2015

Solar/Photovoltaic

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Springer and Tsinghua University Press present the second Nano Research Award: Paul Alivisatos of the University of California Berkeley receives the honor for outstanding contributions in nanoscience July 30th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Rice University finding could lead to cheap, efficient metal-based solar cells: Plasmonics study suggests how to maximize production of 'hot electrons' July 22nd, 2015

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