Navigation Links
Slippery when stacked: NIST theorists quantify the friction of graphene
Date:1/11/2012

Similar to the way pavement, softened by a hot sun, will slow down a car, graphenea one-atom-thick sheet of carbon with wondrous propertiesslows down an object sliding across its surface. But stack the sheets and graphene gets more slippery, say theorists at the National Institute of Standards and Technology (NIST), who developed new software to quantify the material's friction.

"I don't think anyone expects graphene to behave like a surface of a three-dimensional material, but our simulation for the first time explains the differences at an atomic scale," says NIST postdoctoral researcher Alex Smolyanitsky, who wrote the modeling program and co-authored a new paper* about the study. "If people want to use graphene as a solid-state lubricant or even as a part of flexible electrodes, this is important work."

With the capacity to be folded, rolled or stacked, graphene is super-strong and has unusual electronic and optical properties. The material might be used in applications ranging from electronic circuits to solar cells to "greasing" moving parts in nanoscale devices.

Friction is the force that resists the sliding of two surfaces against each other. Studying friction at the atomic scale is a challenge, surmountable in only the past few years. The NIST software simulates atomic force microscopy (AFM) using a molecular dynamics technique. The program was used to measure what happens when a simulated AFM tip moves across a stack of one to four graphene sheets (see image) at different scanning rates.

The researchers found that graphene deflects under and around the AFM tip. The localized, temporary warping creates rolling friction or resistance, the force that exerts drag on a circular object rolling along a surface. Smolyanitsky compares the effect to the sun melting and softening pavement in the state where he got his doctoral degree, Arizona, causing car tires to sink in slightly and slow down. The NIST results are consis
'/>"/>

Contact: Laura Ost
laura.ost@nist.gov
303-497-4880
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Slippery slope:Researchers take advice from a carnivorous plant
2. Diagenode Releases Two New Epigenetic Monoclonal 5-hmC Antibodies for Quantifying Global Hydroxymethylation
3. Bruker Introduces HyperQuant™, a Unique Bench-Top NMR Reader to Quantify Hyperpolarization
4. Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
5. Nanotechnologists reveal the frictional characteristics of atomically thin sheets
6. Nanotechnologists from Penn collaborate to form near-frictionless diamond material
7. Metamaterials could reduce friction in nanomachines
8. Friction force differences could offer a new means for sorting and assembling nanotubes
9. Models present new view of nanoscale friction
10. Graphene reveals its magnetic personality
11. Graphene rips follow rules
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Slippery when stacked: NIST theorists quantify the friction of graphene
(Date:10/22/2014)... Involution Studios , a healthcare ... new infographic, Understanding Ebola . The goal ... easy to follow informative tool for anyone wanting to ... and prevention. , "As the news has spread in ... outbreak represents not only a healthcare crisis with global ...
(Date:10/22/2014)... 22, 2014 Currently offering a ... & D Weighing, Rice Lake, and Ohaus, Pipette.com ... . The Sartorius CPA Semi-Micro Balance is ideal ... precise, and user-friendly laboratory balance. , Sartorius is ... their laboratory balances are well known for their ...
(Date:10/22/2014)... 22, 2014 Physicians Choice Laboratory ... pharmacogenetics menu, which enables healthcare providers to individualize ... PCLS’s evidence-based results, healthcare providers are better able ... therapy, while minimizing risks for adverse drug reactions ... to the FDA [1] more than 2.2 million ...
(Date:10/22/2014)...   Synthetic Biologics, Inc. (NYSE MKT: SYN), ... infections and diseases, announced today that the U.S. Patent ... for a composition of matter patent application that covers ... SYN-004. This is Synthetic Biologics, first allowed patent application ... to the Company,s extensive C. difficile patent ...
Breaking Biology Technology:Involution Studios' Ebola Infographic Provides Key Disease Information and Statistics at a Glance 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 3PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 2PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 2Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 4
... Wis . - Nearly half of the nation's top 25 ... Endpoint Exchange, LLC , a business unit of ... Ilsley Corp. , ,Twelve of the nation's largest banks ... instead of having to physically convey them, a capability that ...
... money from the Minority Business Development Fund , the ... minority-owned technology businesses in Madison. , , Gov. Jim Doyle ... will receive loans to help them expand and create jobs. ... capital to develop and market a private, anonymous software transaction ...
... Wis. - Following a devastating legal rebuke, the ... the company he founded to pursue other business interests. ... the Verona-based provider of uninterruptible power supply services, resigned ... president Charley Eaton was appointed president of JT Packard. ...
Cached Biology Technology:
(Date:10/18/2014)... 2,000 patients referred for evaluation of suspected genetic ... for 25 percent, including detection of a number ... to disease, according to a study appearing in ... to coincide with the American Society of Human ... exons or coding regions of thousands of genes ...
(Date:10/17/2014)... German . Why ... order to reproduce? And why are there two sexes anyway? ... issue of the research journal Molecular Human Reproduction ... from Bielefeld University Bielefeld has compiled this special issue on ... female to copulate with several males in quick succession – ...
(Date:10/16/2014)... constantly wages war on the human body. Battles ... stalemate. In pancreatic cancer, this stalemate—known as tumor ... aggressively malignant, a phenomena that is poorly understood. ... the laboratory of Salvatore Torquato, a Professor of ... conditions surrounding tumor dormancy and the switch to ...
Breaking Biology News(10 mins):Whole-exome sequencing shows potential as diagnostic tool 2Sperm wars 2Modeling tumor dormancy 2
... was launched today by the Chinese National Space Administration ... Centre, Sichuan, atop a Long March 3A rocket. ... to land robotic explorers on the Moon before 2020. ... first is to make three-dimensional images of many lunar ...
... and Ludwigshafen, Germany-October 24, 2007-Harvard University,s Office of ... agreement to jointly establish the BASF Advanced Research ... of Engineering and Applied Sciences (SEAS) the initiative ... and schools throughout the University. Set up ...
... Researchers at the University of Minnesotas Stem Cell Institute ... used to study how human embryonic stem cells differentiate. ... Experimental Biology and Medicine. Researchers know very little ... fully understand these cells self renewal capacity and pluripotency, ...
Cached Biology News:Chang'e-1 -- new mission to Moon lifts off 2BASF and Harvard University announce extensive research collaboration 2