Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Scientists Determine Fluctuations Caused by Temperature on Graphene Surface

Abstract:
Iranian researchers from Shahid Rajayee Teacher Training University in association with foreign researchers succeeded in the measurement of thermal fluctuations created on the surface of graphene.

Scientists Determine Fluctuations Caused by Temperature on Graphene Surface

Tehran, Iran | Posted on August 4th, 2014

Graphene, being discovered about a decade ago by physicists from University of Manchester, has attracted the attention of many researchers in various sciences and engineering aspects due to its unique physical properties, including thermal and electrical conductivity, high density and mobility in charge carriers and optical and mechanical properties.

By using scanning tunneling microscopic (STM) measurements taken from graphene surface, the researchers measured forced and free thermal fluctuations created in low frequency in graphene. The research was carried out by theoretical physicists from Shahid Rajayee Teacher Training University, University of Arkansas in the United States, University of Basel in Switzerland and University of Antwerp in Belgium.

Dr. Mehdi Nik Amal, the supervisor of the research, explained about the results, and said, "The measurement was carried out on the surface of suspended graphene with an area of one square angstrom. Our observation shows that the force caused by the heat produced tunneling process and electrostatic force caused by bios voltage compete with each other during the control and change in fluctuations on graphene surface. Tunneling current acts on graphene surface in a way that causes thermal tension on the surface, the tension is opposed to other normal mechanical tensions due to graphene's negative thermal extension coefficient at room temperature. This fact finally results in significant reduction in graphene's fluctuation frequency."

Results of the research have been published in Nature Communication, vol. 5, issue 3720, April 2014, pp. 4720-1 to 4720-6.

####

For more information, please click here

Copyright © Fars News Agency

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

Nanotube fiber antennas as capable as copper: Rice University researchers show their flexible fibers work well but weigh much less October 23rd, 2017

Arrowhead Presents Promising Preclinical Data on Development of ARO-AAT for Treatment of Alpha-1 Liver Disease at Liver Meeting(R) 2017 October 23rd, 2017

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Imaging

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Bringing the atomic world into full color: Researchers turn atomic force microscope measurements into color images October 19th, 2017

Photoacoustic imaging and photothermal cancer therapy using BR nanoparticles September 26th, 2017

Graphene/ Graphite

Graphene forged into three-dimensional shapes September 26th, 2017

New quantum phenomena in graphene superlattices September 18th, 2017

Graphene based terahertz absorbers: Printable graphene inks enable ultrafast lasers in the terahertz range September 13th, 2017

Discoveries

Nanotube fiber antennas as capable as copper: Rice University researchers show their flexible fibers work well but weigh much less October 23rd, 2017

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Materials/Metamaterials

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

MIPT scientists revisit optical constants of ultrathin gold films October 20th, 2017

Long nanotubes make strong fibers: Rice University researchers advance characterization, purification of nanotube wires and films October 17th, 2017

The secret to improving liquid crystal's mechanical performance: Better lubricating properties of lamellar liquid crystals could stem from changing the mobility of their structural dislocations by adding nanoparticles October 13th, 2017

Announcements

Nanotube fiber antennas as capable as copper: Rice University researchers show their flexible fibers work well but weigh much less October 23rd, 2017

Arrowhead Presents Promising Preclinical Data on Development of ARO-AAT for Treatment of Alpha-1 Liver Disease at Liver Meeting(R) 2017 October 23rd, 2017

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Nanotube fiber antennas as capable as copper: Rice University researchers show their flexible fibers work well but weigh much less October 23rd, 2017

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Strange but true: turning a material upside down can sometimes make it softer October 20th, 2017

Tools

Creation of coherent states in molecules by incoherent electrons October 21st, 2017

Bringing the atomic world into full color: Researchers turn atomic force microscope measurements into color images October 19th, 2017

Nanometrics Announces Preliminary Results for the Third Quarter of 2017: Quarterly Results Impacted by Delays in Revenue Recognition on Multiple Systems into Japan October 12th, 2017

Seeing the next dimension of computer chips: Researchers image perfectly smooth side-surfaces of 3-D silicon crystals with a scanning tunneling microscope, paving the way for smaller and faster computing devices October 11th, 2017

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