Chemistry Times
Recent News |  Archives |  Tags |  About |  Newsletter |  Submit News |  Links |  Subscribe to ChemistryTimes.com RSS Feed Subscribe


More Articles
Satellite shows high productivity from US corn beltSatellite shows high productivity from US corn belt

Emerging research suggests a new paradigm for 'unconventional superconductors'Emerging research suggests a new paradigm for 'unconventional superconductors'

Virus structure inspires novel understanding of onion-like carbon nanoparticlesVirus structure inspires novel understanding of onion-like carbon nanoparticles

Sperm meets egg: Protein essential for fertilization discoveredSperm meets egg: Protein essential for fertilization discovered

Warm US West, cold East: A 4,000-year patternWarm US West, cold East: A 4,000-year pattern

At the origin of cell divisionAt the origin of cell division

The surprising consequences of banning chocolate milkThe surprising consequences of banning chocolate milk

Researchers determine how mechanical forces affect T-cell recognition and signalingResearchers determine how mechanical forces affect T-cell recognition and signaling

La Brea Tar Pit fossil research shows climate change drove evolution of Ice Age predatorsLa Brea Tar Pit fossil research shows climate change drove evolution of Ice Age predators

Running geese give insight into low oxygen toleranceRunning geese give insight into low oxygen tolerance

Galactic serial killerGalactic serial killer

Positive, negative thinkers' brains revealedPositive, negative thinkers' brains revealed

Babies prefer fairness -- but only if it benefits them -- in choosing a playmateBabies prefer fairness -- but only if it benefits them -- in choosing a playmate

An ultrathin collagen matrix biomaterial tool for 3D microtissue engineeringAn ultrathin collagen matrix biomaterial tool for 3D microtissue engineering

Friedreich's ataxia -- an effective gene therapy in an animal modelFriedreich's ataxia -- an effective gene therapy in an animal model

A new twist makes for better steel, researchers findA new twist makes for better steel, researchers find

Renewable energy market share climbs despite 2013 dip in investmentsRenewable energy market share climbs despite 2013 dip in investments

Research suggests autumn is ending later in the northern hemisphereResearch suggests autumn is ending later in the northern hemisphere

Sniff study suggests humans can distinguish more  than 1 trillion scentsSniff study suggests humans can distinguish more than 1 trillion scents

Study finds gaming augments players' social livesStudy finds gaming augments players' social lives

Off the shelf, on the skin: Stick-on electronic patches for health monitoringOff the shelf, on the skin: Stick-on electronic patches for health monitoring

A breakthrough in creating invisibility cloaks, stealth technologyA breakthrough in creating invisibility cloaks, stealth technology

Overcoming structural uncertainty in computer modelsOvercoming structural uncertainty in computer models

Monkey caloric restriction study shows big benefit; contradicts earlier studyMonkey caloric restriction study shows big benefit; contradicts earlier study

Researchers developed world's first fluorescent sensor to detect date rape drugResearchers developed world's first fluorescent sensor to detect date rape drug

Copied from nature: Detecting software errors via genetic algorithmsCopied from nature: Detecting software errors via genetic algorithms

Turning back the clock on aging muscles?Turning back the clock on aging muscles?

Gecko-inspired adhesion: Self-cleaning and reliableGecko-inspired adhesion: Self-cleaning and reliable

New study finds differences in concussion risk between football helmetsNew study finds differences in concussion risk between football helmets

Hydrogen advances graphene use (1/16/2012)

Tags:
graphene, hydrogen

Physicists at Linköping University have shown that a dose of hydrogen or helium can render the "super material" graphene even more useful.

Graphene has engendered high expectations whereof its extreme properties depend on the fact that it consists of a single sheet of carbon atoms. However the attraction forces between the atoms cause the sheets to be drawn to each other. One solution is to add atomic hydrogen between the layers.

Presented in the eminent journal Physical Review A, the researchers' calculations show that the hydrogen at a given concentration affects the atomic van der Waals forces and becomes repulsive instead of attractive. The result is that graphene sheets repel each other and float freely just a few nanometres apart (an example of the so-called quantum levitation).

Professor Bo E. Sernelius, who conducted the study in conjunction with his former doctoral student Mathias Boström, identifies several possible applications of the discovery:

  • Storage of hydrogen as vehicle fuel
  • Creation of a single graphene sheet by peeling them from a pile that has grown on a substrate of silicon carbide; a method developed at Linköping University
  • Repulsive forces are ideal for the manufacture of friction-free components on a Nano scale, for example, robots and sensors for medical purposes.

In the present study the researchers began with two undoped sheets of graphene on a substrate of silicon dioxide (silica). The starting position is the van der Waals attractive forces and the sheets are compelled closer together. However once atomic hydrogen is added, repulsive forces arise. A similar effect was observed using other gases such as molecular hydrogen (H2) and helium.

Graphene is a two-dimensional material, which means that it retains a very special character. It is flexible, transparent, stronger than a diamond and has a superior ability to conduct electric current. In 2010 André Geim and Konstantin Novoselov received a Nobel Prize in Physics because for the first time ever they succeeded in producing stable flakes of material.

Note: This story has been adapted from a news release issued by the Linköping University

Post Comments:

Search
New Articles
Chemists' work with small peptide chains may revolutionize study of enzymes and diseasesChemists' work with small peptide chains may revolutionize study of enzymes and diseases

Researchers open path to finding rare, polarized metalsResearchers open path to finding rare, polarized metals

Tiny crystals to boost solarTiny crystals to boost solar

Strain can alter materials' properties

Europium complexes emit red light at record efficiencyEuropium complexes emit red light at record efficiency

Next-generation coatings and sensors that can operate in extreme conditions

New gel allows for targeted therapy after heart attackNew gel allows for targeted therapy after heart attack

Researchers developing cheap, better-performing lithium-ion batteries

Scientists find missing piece of air particle equation hiding in the walls

Researchers announce first phononic crystal that can be altered in real timeResearchers announce first phononic crystal that can be altered in real time

International team using shape memory alloys to rehab concrete structuresInternational team using shape memory alloys to rehab concrete structures

Hybrid vehicles more fuel efficient in India, China than in US

Heat-conducting polymer cools hot electronic devices at 200 degrees CHeat-conducting polymer cools hot electronic devices at 200 degrees C

Research center to develop next generation of advanced chemical products

Fingerprint of dissolved glycine in the Terahertz range explainedFingerprint of dissolved glycine in the Terahertz range explained



Archives
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007


Science Friends
Agricultural Science
Astronomy News
Sports Tech
Biology News
Biomimicry Science
Cognitive Research
Tissue Engineering
Cancer Research
Cybernetics Research
Electonics Research
Forensics Report
Fossil News
Genetic Archaeology
Genetics News
Geology News
Microbiology Research
Nanotech News
Parenting News
Physics News


  Archives |  Submit News |  Advertise With Us |  Contact Us |  Links
Use of this site constitutes acceptance of our Terms of Service and Privacy Policy. All contents © 2000 - 2015 Web Doodle, LLC. All rights reserved.