Navigation Links
Seeing moire in graphene
Date:4/28/2010

Researchers at the National Institute of Standards and Technology (NIST) and the Georgia Institute of Technology have demonstrated* that atomic scale moir patterns, an interference pattern that appears when two or more grids are overlaid slightly askew, can be used to measure how sheets of graphene are stacked and reveal areas of strain. The ability to determine the rotational orientation of graphene sheets and map strain is useful for understanding the electronic and transport properties of multiple layers of graphene, a one-atom thick form of carbon with potentially revolutionary semiconducting properties.

In digital photography, moir (pronounced mwar-ray) patterns occur because of errors in the rendering process, which causes grid patterns to look wavy or distorted. Materials scientists have been using microscopic moir patterns to detect stresses such as wrinkles or bulges in a variety of materials.

Researchers created graphene on the surface of a silicon carbide substrate at the Georgia Institute of Technology by heating one side so that only carbon, in the form of multilayer sheets of graphene, was left. Using a custom-built scanning tunneling microscope at NIST, the researchers were able to peer through the topmost layers of graphene to the layers beneath. This process, which the group dubbed "atomic moir interferometry," enabled them to image the patterns created by the stacked graphene layers, which in turn allowed the group to model how the hexagonal lattices of the individual graphene layers were stacked in relation to one another.

Unlike other materials that tend to stretch out when they cool, graphene bunches up like a wrinkled bed sheet. The researchers were able to map these stress fields by comparing the relative distortion of the hexagons of carbon atoms that comprise the individual graphene layers. Their technique is so sensitive that it is able to detect strains in the graphene layers causing as little as a 0.1 per
'/>"/>

Contact: Mark Esser
301-975-8735
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Seeing the quantum in chemistry: JILA scientists control chemical reactions of ultracold molecules
2. UM physicists show electrons can travel over 100 times faster in graphene than in silicon
3. Graphene gazing gives glimpse of foundations of universe
4. Graphene used to create worlds smallest transistor
5. Graphene-based gadgets may be just years away
6. By adding graphene, researchers create superior polymer
7. Penn scientists demonstrate potential of graphene films as next-generation transistors
8. Graphene pioneers follow in Nobel footsteps
9. New graphene-based material clarifies graphite oxide chemistry
10. Researchers discover method for mass production of nanomaterial graphene
11. Light-speed nanotech: Controlling the nature of graphene
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Seeing moire in graphene
(Date:10/31/2014)... 31, 2014 Huge event with ... future pharma industry health, analysis and forecasting   ... the closing of its most successful show to date ... 2,500 exhibitors. Held this year in Paris ... key players from 140+ countries representing every step of ...
(Date:10/31/2014)... Jeffrey T. Manuel, assistant professor in Southern ... College of Arts and Sciences, is teaming up with ... alcohol-based fuels in Illinois. , “Farmers, researchers, ... to build Illinois’ biofuels industry for decades,” Manuel said. ... state's agricultural and business history. , “Fuel alcohol ...
(Date:10/31/2014)... ENVIRON , an international ... that Dr. Harvey Clewell III has rejoined the ... closely with senior professionals in ENVIRON’s Health Sciences ... at The Hamner Institutes for Health Sciences (The ... he is Director, Center for Human Health Assessment. ...
(Date:10/30/2014)... -- Investor-Edge has initiated coverage on the ... Inc. (NASDAQ: MDVN ), Pharmacyclics Inc. (NASDAQ: ... SYN), and Ironwood Pharmaceuticals Inc. (NASDAQ: IRWD). Free research ... http://investor-edge.com/register . On Wednesday, October 29, 2014, ... Dow Jones Industrial Average declined 0.18%, to finish the ...
Breaking Biology Technology:CPhI Worldwide 2014 Announces Biggest Ever Show and Points to Pharma Growth in Brazil, Russia and Fast Emerging Africa 2CPhI Worldwide 2014 Announces Biggest Ever Show and Points to Pharma Growth in Brazil, Russia and Fast Emerging Africa 3CPhI Worldwide 2014 Announces Biggest Ever Show and Points to Pharma Growth in Brazil, Russia and Fast Emerging Africa 4CPhI Worldwide 2014 Announces Biggest Ever Show and Points to Pharma Growth in Brazil, Russia and Fast Emerging Africa 5CPhI Worldwide 2014 Announces Biggest Ever Show and Points to Pharma Growth in Brazil, Russia and Fast Emerging Africa 6SIUE History Prof Manuel Working on Biofuels Book with NCERC 2SIUE History Prof Manuel Working on Biofuels Book with NCERC 3Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 2Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 2Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 4Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 5
... March 16, Shire plc (LSE: SHP, NASDAQ: ... the U.S. District Court of the Southern District of,New ... three,of Shire,s patents: U.S. Patent No. 5,968,976 (",976 Patent"); ... (",465"). , The lawsuit was ...
... AutoImmune Inc. (OTC Bulletin Board: AIMM) today reported a net ... for the three months ended December 31, 2008, compared with ... basic and diluted, for the three months ended December 31, ... loss was $345,000, or $0.02 per share basic and diluted, ...
... 16 Contamination by mycoplasmal organisms is an ... them ready sources of contamination, while rendering them ... white paper, examines how PCR mycoplasma tests ... minimizes testing delays and enable safe, high-volume biopharmaceutical ...
Cached Biology Technology:Shire Files Lawsuit Against Barr Laboratories for Infringement of FOSRENOL(R) (Lanthanum Carbonate) Patents 2AutoImmune Inc. Reports 2008 Fourth Quarter and Year End Financial Results 2AutoImmune Inc. Reports 2008 Fourth Quarter and Year End Financial Results 3AutoImmune Inc. Reports 2008 Fourth Quarter and Year End Financial Results 4New White Paper Examines Advanced Mycoplasma Tests - How Real-Time PCR Analysis Helps Save Time and Money for Biopharmaceutical Manufacturers 2New White Paper Examines Advanced Mycoplasma Tests - How Real-Time PCR Analysis Helps Save Time and Money for Biopharmaceutical Manufacturers 3
(Date:10/29/2014)... At a ceremony held in New York City on ... King, the American Cancer Society Professor of Genome Sciences ... and 2008 Honorary Doctor of Philosophy of Tel Aviv ... in Medical Science. , In addition to her honorary ... Lecturer at the TAU School of Medicine, and for ...
(Date:10/29/2014)... One kind of stem cell, those referred to as ... There is apparently nothing that differentiates these cells from ... namely they retain the capacity to become stem cells ... liver, an organ that hosts cells that stimulate tissue ... the case of a transplant. Knowledge of the ...
(Date:10/29/2014)... in the living world compete with members of ... how much they invest into their competitive ability. ... get access to high-quality resources, while others seem ... the lower-quality resources that are left over for ... and human societies seems to fluctuate considerably over ...
Breaking Biology News(10 mins):Geneticist and humanitarian: Prof. Mary-Claire King receives Lasker Award 2A mechanism that allows a differentiated cell to reactivate as a stem cell revealed 2Evolution of competitiveness 2Evolution of competitiveness 3
... HOUSTON (Dec. 5, 2013) A new method ... proteins may speed the process of novel drug design, ... combination of computational techniques and experimental data helped Rice ... have been hard to detect. The work ...
... CHAMPAIGN, Ill. A 115-million-year-old fossilized wasp from northeast Brazil ... organ through which it lays its eggs, looks a lot ... figs. The problem, researchers say, is that figs arose about ... report of the findings appears in the journal ...
... levers: miniaturized robots of the future will be "soft". , ... to mind are the tentacles of an octopus or the ... a crane or the inner workings of a watch. And ... organisms moving in water. The robots of the future will ...
Cached Biology News:Proteins' passing phases revealed 2Proteins' passing phases revealed 3Ancient 'fig wasp' lived tens of millions of years before figs 2'Soft' (and miniaturized) robots 2
... the ideal CO2 incubator for cell and ... embryos at or near body temperature. HERAcell ... needed to protect and grow your valuable ... incubation conditions ensure optimum culture growth. ...
SP6 RNA Polymerase, 50 l, 20 U/l ,Cap Scribe Buffer, 100 l, 5x conc....
...
... High Vacuum pumps deliver critical performance ... gas ballast control optimizes pump performance to ... glass allows for convenient checking of proper ... series of pumps is designed to work ...
Biology Products: