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

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

Possible Futures

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

GraphExeter illuminates bright new future for flexible lighting devices June 23rd, 2016

Nanoelectronics

Soft decoupling of organic molecules on metal June 23rd, 2016

Tailored DNA shifts electrons into the 'fast lane': DNA nanowire improved by altering sequences June 22nd, 2016

Scientists engineer tunable DNA for electronics applications June 21st, 2016

Novel energy inside a microcircuit chip: VTT developed an efficient nanomaterial-based integrated energy June 10th, 2016

Announcements

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Ultrathin, flat lens resolves chirality and color: Multifunctional lens could replace bulky, expensive machines June 25th, 2016

Nanotechnology and math deliver two-in-one punch for cancer therapy resistance June 24th, 2016

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

Energy

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

Researchers discover new chemical sensing technique: Technique allows sharper detail -- and more information -- with near infrared light June 24th, 2016

FEI and University of Liverpool Announce QEMSCAN Research Initiative: University of Liverpool will utilize FEIís QEMSCAN technology to gain a better insight into oil and gas reserves & potentially change the approach to evaluating them June 22nd, 2016

Titan shines light on high-temperature superconductor pathway: Simulation demonstrates how superconductivity arises in cuprates' pseudogap phase June 22nd, 2016

Automotive/Transportation

Artificial synapse rivals biological ones in energy consumption June 21st, 2016

Marrying superconductors, lasers, and Bose-Einstein condensates: Chapman University Institute for Quantum Studies (IQS) member Yutaka Shikano, Ph.D., recently had research published in Scientific Reports June 20th, 2016

Stanford researchers find new ways to make clean hydrogen and rechargable zinc batteries June 18th, 2016

Ensuring the future affordability of wind turbines, computers and electric cars June 2nd, 2016

Aerospace/Space

Novel capping strategy improves stability of perovskite nanocrystals: Study addresses instability issues with organometal-halide perovskites, a promising class of materials for solar cells, LEDs, and other applications June 13th, 2016

Quantum satellite device tests technology for global quantum network: Singapore-built satellite makes and measures light particles pair by pair June 3rd, 2016

Deep Space Industries and SFL selected to provide satellites for HawkEye 360ís Pathfinder mission: The privately-funded space-based global wireless signal monitoring system will be developed by Deep Space Industries and UTIAS Space Flight Laboratory May 26th, 2016

Rice de-icer gains anti-icing properties: Dual-function, graphene-based material good for aircraft, extreme environments May 23rd, 2016

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

Stanford researchers find new ways to make clean hydrogen and rechargable zinc batteries June 18th, 2016

Efficient hydrogen production made easy: Sticking electrons to a semiconductor with hydrazine creates an electrocatalyst June 17th, 2016

A New Approach To Building Efficient Thermoelectric Nanomaterials June 17th, 2016

Novel energy inside a microcircuit chip: VTT developed an efficient nanomaterial-based integrated energy June 10th, 2016

Solar/Photovoltaic

Nanoscientists develop the 'ultimate discovery tool': Rapid discovery power is similar to what gene chips offer biology June 25th, 2016

New generation of high-efficiency solar thermal absorbers developed June 20th, 2016

Novel capping strategy improves stability of perovskite nanocrystals: Study addresses instability issues with organometal-halide perovskites, a promising class of materials for solar cells, LEDs, and other applications June 13th, 2016

Perovskite solar cells surpass 20 percent efficiency: EPFL researchers are pushing the limits of perovskite solar cell performance by exploring the best way to grow these crystals June 13th, 2016

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







Car Brands
Buy website traffic