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:7/30/2015)... Washington , July 30, 2015 ... Market, by Product (Software, Molecular Modeling, PB/PK, PKPD, Trial ... Discovery & Development, Preclinical, Clinical Trial), by End Users ... Biosimulation Market is expected to reach USD 2,107.99 million ... a CAGR of 15.29%. Browse more ...
(Date:7/30/2015)... Kan. , July 30, 2015   ... a pet therapeutics company focused on the licensing, ... companion animals, today announced that its strategic partner ... a dose confirmation study of AT-016, an adipose-derived ... for the treatment of osteoarthritis pain in dogs. ...
(Date:7/30/2015)... across the globe, ISN improves the efficiency and effectiveness of contractor management systems. ISN,s ... reliable contractors in over 80 countries. ... ... Over 60,000 Worldwide Customers In More Than 80 Countries ... Headquartered in Dallas, TX , ISN has additional offices in Calgary ...
(Date:7/30/2015)... -- HIGHLIGHTS:Q2 2015 Results (all changes are ... sales were $697 million compared to $701 million in ... 8%, and changes in foreign currency exchange rates decreased ... , By business unit, organic sales growth was ... SAFC Commercial. , Reported diluted EPS was $0.98 ...
Breaking Biology Technology:Biosimulation Market Worth 2,107.99 Million USD by 2020 2Biosimulation Market Worth 2,107.99 Million USD by 2020 3Biosimulation Market Worth 2,107.99 Million USD by 2020 4Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 2Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 3Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 4Aratana Therapeutics Announces Positive Pilot Field Study for AT-016 5ISN Reaches Over 60,000 Worldwide Customers 2ISN Reaches Over 60,000 Worldwide Customers 3Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 2Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 3Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 4Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 5Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 6Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 7Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 8Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 9Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 10Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 11Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 12Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 13Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 14Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 15Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 16Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 17Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 18Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 19Sigma-Aldrich (NASDAQ - SIAL) Reports Q2 2015 Sales Of $697 Million And Adjusted Diluted EPS Of $1.01 20
... Cup may be two years away, but soccer aficionados ... for global competition when the National Institute of Standards ... second-ever international nanosoccer contest next summer. , Nanosoccerthe Lilliputian ... challenge one another on fields no bigger than a ...
... November 14, 2008 at 9:00 a.m. Eastern ... ... Inc. (Nasdaq: ALSE ) today reports operational and,financial results for the ... (Logo: http://www.newscom.com/cgi-bin/prnh/20080813/NEW056LOGO ), "We are encouraged by the ...
... Spherix Incorporated,(Nasdaq: SPEX ) reported a net ... 2008 of $1.7 million ($0.12 per share) and $4.8 ... related to the commercialization of Naturlose as a treatment ... nine month period ended,September 30, 2008, compared to approximately ...
Cached Biology Technology:Let the games begin! Nanosoccer at 2009 RoboCup in Austria 2Alseres Pharmaceuticals, Inc. Reports Third Quarter 2008 Operational and Financial Results 2Alseres Pharmaceuticals, Inc. Reports Third Quarter 2008 Operational and Financial Results 3Alseres Pharmaceuticals, Inc. Reports Third Quarter 2008 Operational and Financial Results 4Alseres Pharmaceuticals, Inc. Reports Third Quarter 2008 Operational and Financial Results 5Spherix Reports 3rd Quarter Earnings 2
(Date:7/9/2015)... 9, 2015  Unchained Labs just can,t get ... of Avid Nano. Avid Nano designs, develops and ... Also today, Unchained Labs UNcaged ... to use protein sizing system. The pUNk is ... hydrodynamic size, size distribution, aggregation population and molecular ...
(Date:7/8/2015)... 2015 Summary Pancreatic cancer is the ... fatal, with a mortality rate of 10.9 deaths per ... cancer patients has highlighted a significant need for new ... met by the current market. A highly active ... varying molecule types and mechanisms of action, which provides ...
(Date:7/8/2015)... 2015  Trovagene, Inc. (NASDAQ: TROV ), ... the launch of a study that aims to ... (PCM) technology for predicting response to treatment in ... of the novel immunotherapy agents Yervoy® (ipilumumab), a ... The 50-patient study will be led by researchers ...
Breaking Biology News(10 mins):Unchained Labs just can't get enough, acquires Avid Nano, rocks out the new pUNk! 2Frontier Pharma: Pancreatic Cancer - Identifying and Commercializing First-in-Class Innovation 2Frontier Pharma: Pancreatic Cancer - Identifying and Commercializing First-in-Class Innovation 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 2Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 4
... are leading the largest ever international research project into ... The research will aim to provide new insights into ... kills up to 40,000 women and almost one million ... study, DNA collected from thousands of pregnant women, including ...
... about to be published in EPJ E, French physicists from ... of a thin layer of cells in contact with an ... elastic films. Understanding the mechanism by which a thin layer ... structural integrity, bears great significance because the human tissue, or ...
... TAMPA, Fla. (May 16, 2012) Chlorothalonil, ... on food crops and golf courses, was lethal to ... study, University of South Florida researchers said Wednesday. ... study published in the journal Ecology Letters , ...
Cached Biology News:Nottingham researchers lead world's largest study into pre-eclampsia 2USF study: Common fungicide wreaks havoc on freshwater ecosystems 2
8.1.1...
Human SCP3 Affinity Purified Polyclonal Ab Keywords: Spermatogenesis, meiosis Protein Family: Cell Cycle...
... and efficient purification of DNA and oligonucleotides ... by gravity flow.Prepacked with Sephadex G-25 DNA ... CG/ICP Biocide.Available in three sizes depending on ... ml (NAP-10) or 2.5 ml (NAP-25).Useful for ...
Homo sapiens alcohol dehydrogenase 5 (class III), chi polypeptide (ADH5), mRNA....
Biology Products: