Navigation Links
Carbyne morphs when stretched
Date:7/21/2014

because there are two driving factors."

One, the Peierls distortion, "wants to open the gap that makes it a semiconductor." The other, called zero-point vibration (ZPV), "wants to maintain uniformity and the metal state."

Yakobson explained that ZPV is a manifestation of quantum uncertainty, which says atoms are always in motion. "It's more a blur than a vibration," he said. "We can say carbyne represents the uncertainty principle in action, because when it's relaxed, the bonds are constantly confused between 2-2 and 1-3, to the point where they average out and the chain remains metallic."

But stretching the chain shifts the balance toward alternating long and short (1-3) bonds. That progressively opens a band gap beginning at about 3 percent tension, according to the computations. The Rice team created a phase diagram to illustrate the relationship of the band gap to strain and temperature.

How carbyne is attached to electrodes also matters, Artyukhov said. "Different bond connectivity patterns can affect the metallic/dielectric state balance and shift the transition point, potentially to where it may not be accessible anymore," he said. "So one has to be extremely careful about making the contacts."

"Carbyne's structure is a conundrum," he said. "Until this paper, everybody was convinced it was single-triple, with a long bond then a short bond, caused by Peierls instability." He said the realization that quantum vibrations may quench Peierls, together with the team's earlier finding that tension can increase the band gap and make carbyne more insulating, prompted the new study.

"Other researchers considered the role of ZPV in Peierls-active systems, even carbyne itself, before we did," Artyukhov said. "However, in all previous studies only two possible answers were being considered: either 'carbyne is semiconducting' or 'carbyne is metallic,' and the conclusion, whichever one, was viewed as sort of a timeless
'/>"/>

Contact: David Ruth
david@rice.edu
713-348-6327
Rice University
Source:Eurekalert  

Page: 1 2 3

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Carbyne morphs when stretched
(Date:10/18/2014)... October 18, 2014 The Asian Electronic Medical ... in Asian with analysis and forecast of revenue. The electronic ... grow to $2,328.0 million by 2018, at a CAGR of ... of the Asian Electronic Medical Record (EMR) market, to get ... a glimpse of the segmentation of the market in the ...
(Date:10/18/2014)... The report " Cloud Analytics ... Web; Speech; Machine; Video; Predictive Analytics: Global Advancements, ... & Analysis (2013 - 2018) ", defines and ... sub segments with an in-depth analysis and forecasting ... factors driving this market, various restraints, and opportunities ...
(Date:10/17/2014)... journey through the looking-glass to Wonderland, mirrors in the ... ways, including a new class of mirror that works ... The Optical Society,s (OSA) new high-impact journal ... time, a new type of mirror that forgoes a ... by using an unusual magnetic property of a non-metallic ...
(Date:10/17/2014)... Horsham, PA (PRWEB) October 17, 2014 ... is being called upon by health facilities around ... exposed patients are being treated. Among the many ... used includes Texas Health Presbyterian Hospital Dallas and ... Center. The state-of-the-art vapor-producing robots have been utilized ...
Breaking Biology Technology:The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 2The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 3The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 4The Asian Electronic Medical Record (EMR) market is estimated to grow to $2,328.0 million by 2018 - New Report by MicroMarket Monitor 5Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 2Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 3Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 4Cloud Analytics Market (by Cloud Business Intelligence & Predictive Analytics) Expected to Cross $16.52 Billion by 2018 - New Report by MarketsandMarkets 5Magnetic mirrors enable new technologies by reflecting light in uncanny ways 2Magnetic mirrors enable new technologies by reflecting light in uncanny ways 3Magnetic mirrors enable new technologies by reflecting light in uncanny ways 4Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 2Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 3Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 4Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 5Bioquell’s Vapor Producing Robots Selected to Combat Ebola in Hospitals Around the World 6
...   Reportlinker.com announces that a new market ... , Strategic Analysis of the Collagen ... http://www.reportlinker.com/p0760990/Strategic-Analysis-of-the-Collagen-Peptide-Market-in-the-United-States.html#utm_source=prnewswire&utm_medium=pr&utm_campaign=Biomaterial This ... peptides. The historical period is from 2007, ...
... Jan. 17, 2012  Synthetic Genomics Inc. (SGI), a privately ... a wide range of global challenges, today announced they ... Nutritional Products. Stagnitti is a proven leader with experience ... high value food and nutritional products for humans and ...
... Using growth factors derived from a woman,s own blood, ... developed a simple, office-based procedure that appears to markedly ... preliminary results of this procedure, which involves the injection ... on the upper wall of the vagina and the ...
Cached Biology Technology:Strategic Analysis of the Collagen Peptide Market in the United States 2Synthetic Genomics Inc. Hires Industry Leader George E. Stagnitti to Head Food and Nutritional Products Development Program 2"O-Shot™" May Improve Female Sexual Response 2"O-Shot™" May Improve Female Sexual Response 3
(Date:10/15/2014)... of Life, is a non-traditional biophysics textbook and it ... is a journey of discovery into biological systems and ... biological regulation. It is about how our genes make ... the billions of cells in an organism. It quantifies ... principles, which can be found on both large and ...
(Date:10/15/2014)... Alt will be awarded the 44th Rosenstiel Award for ... his pioneering research exploring the mechanisms of genomic instability ... cells. Alt is the second alumnus to win the ... Prize in 2003. , Alt is the Charles A. ... Harvard Medical School and an investigator at the Howard ...
(Date:10/14/2014)... house fly genome for the first time, revealing robust ... that thrives in pathogen-rich dung piles and garbage heaps. ... Genome Biology , will increase understanding of house ... adapt to resist insecticides, which could lead to novel ... and transmit more than 100 human and animal diseases, ...
Breaking Biology News(10 mins):New book about life as seen from physics 2Brandeis awards 44th Rosenstiel Award to pioneering geneticist Fred Alt 2House fly genome reveals expanded immune system 2
... SANTA CRUZ, CA--Researchers at the University of California, Santa Cruz, ... migrations of elephant seals have compiled one of the largest ... and diving behavior at sea in unprecedented detail. ... PLoS ONE focuses on the annual migrations of adult ...
... saliva of the Gila monster lizard is effective in ... Academy, University of Gothenburg, have tested the drug on ... food and chocolate. An increasing number of patients ... preparation called Exenatide, which helps them to control their ...
... have now been found in shipwrecks both in the Baltic ... the results, presented in the Journal of Archaeological Science, ... University. A few years ago scientists reported large quantities ... warship Vasa, resulting in the development of sulphuric acid ...
Cached Biology News:Elephant seal tracking reveals hidden lives of deep-diving animals 2Elephant seal tracking reveals hidden lives of deep-diving animals 3Drugs from lizard saliva reduces the cravings for food 2Sulphur and iron compounds common in old shipwrecks 2
Sf21 Insect Cells (Live) in Max-XP Medium...
... Super Sensitive Polymer-HRP IHC ... novel product based on ... technology. This system yields ... noise ratio and minimizes ...
Artisan™ Wash Solution (x 50) Additional Information: EU regulatory status: CE US regulatory status: IVD ...
MiniCycler thermal cycler with Hot Bonnet heated lid, holds 25x0.2ml tubes...
Biology Products: