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:11/21/2014)... Author Matthew J. Pallamary’s second short ... Side” published as a tribute to his mentor ... Short Story” category of the 2014 USA Best ... of USA Book News, said this year’s contest yielded ... Simon & Schuster, Penguin, John Wiley & Sons, Houghton ...
(Date:11/21/2014)... November 20, 2014 The November 2014 ... as an open access journal featuring the following articles:, ... proteins to preserve photoresponsiveness in the retina , ... in situ hybridization using chromogenic substrates in zebrafish , ... RNA, and protein electrophoresis , Nuclear LC3-positive ...
(Date:11/21/2014)... 2014 Deep Research Report on ... professional and in-depth research report on the Sodium ... like its definition, classification, application, and industry chain ... covers the international market analysis, including China’s domestic ... US, Europe, Asia, China, Japan etc. regions) industry ...
(Date:11/21/2014)... - Aequus Pharmaceuticals Inc. (the "Company" or "Aequus") ... a brokered private placement offering (the "Brokered Offering") ... Securities Inc. and Clarus Securities Inc. acted as ... syndicate of agents that also included Wolverton Securities ... Concurrently with the Brokered Offering, the Company also ...
Breaking Biology Technology:Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 2Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 3Mystic Ink 's Short Story Collection “A Short Walk to the Other Side” Honoring Ray Bradbury Praised As Award-Winning Finalist In USA Best Book Awards 4BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 2BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 3Sodium Ferrocyanide Market: Analysis for Global & China Regions Development Trends Available at DeepResearchReports.com 2Sodium Ferrocyanide Market: Analysis for Global & China Regions Development Trends Available at DeepResearchReports.com 3Aequus Pharmaceuticals closes $4.2 million private placement financing 2Aequus Pharmaceuticals closes $4.2 million private placement financing 3
... held an organizational meeting last week to name its ... to Wisconsin institutions. , ,Tom Hefty, former co-chairman of ... board of directors. He is now with law firm ... , dean of the UW-Madison College of Engineering ...
... Small Tree Communications , which makes network hardware ... million in federal appropriations to make battlefield communications technology ... of the fiscal year 2006 Defense Appropriations Bill. Small ... the funding opportunity. , ,"We're eager to begin working ...
... the Master of Science in Biotechnology program at UW-Madison. Read ... of the program's students: , , Lynda Bader, Class of ... ,She had achieved success as a strategic consultant to the insurance ... management experience working for a number of industries throughout the state. ...
Cached Biology Technology:UW biotech program launches graduates into evolving industry (part 2) 2UW biotech program launches graduates into evolving industry (part 2) 3
(Date:11/11/2014)... Inc., a Chicago -based digital forensics ... of Yaniv Schiff from Senior Computer Forensics ... role as Director, he will lead company efforts to ... provide leadership within the company,s digital forensics practice area.  ... Schiff joined Forensicon in 2006 and has ...
(Date:11/7/2014)... CORAL SPRINGS, Florida , November 6, 2014 ... improved secure authentication for better mobile security revolutionizing online transactions. ... NXTD ), Alibaba Holdings Ltd. (NYSE: BABA ), ... MSFT ), eBay Inc. (NASDAQ: EBAY ... (NASDAQ: NXTD and NXTDW), a biometric authentication ...
(Date:11/6/2014)... 2014 - Insilico Medicine, Inc, a Baltimore-based bioinformatics ... related diseases announced a research collaboration with the ... Oncology, Inc (OTC: CSBR). , "There are many ... but Champions Oncology,s TumorGraft technology is unique in ... regimen experimentally generating vast amounts of valuable data. ...
Breaking Biology News(10 mins):Yaniv Schiff Promoted to Director of Digital Forensics at Forensicon, Inc. 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6Insilico Medicine, Inc announces research collaboration with Champions Oncology, Inc 2
... service interface for accessing massive amounts of life ... domains has been developed by researchers at RIKEN, ... Scientists, Networking System (SciNetS), the service provides a ... of data records and their network of semantic ...
... Although known for over a century, cryptosporidiosis was believed ... gained attention with the discovery that it can affect ... a single-cell parasite, one of a family known as ... after a sometimes lengthy incubation period they cause gastrointestinal ...
... Fla., May 31, 2011 Ceelox, Inc. (OTCBB: CELO), ... a patent from the U.S. Patent Office. The patent, ... Secure and/or Interactive Dissemination of Information," provides the ability ... as an advertisement, sending the message to a designated ...
Cached Biology News:Web interface defines new paradigm for life science data-sharing 2Good guy or bad guy? Diagnosing stomach disease in pet reptiles 2Ceelox Announces New Patent Issued 2
... have been developed for affinity capture ... variety of ProteinChip chemical surfaces allow ... their unique biochemical properties. Each chip ... sample comparison, and the chips are ...
... been developed for affinity capture of ... of ProteinChip chemical surfaces allow differential ... unique biochemical properties. Each chip has ... comparison, and the chips are color-coded ...
Freeze 'N Squeeze DNA gel extraction spin columns use a quick freeze-and-thaw cycle and centrifugation to draw 50-23,000 bp DNA out of agarose gel slices. Supplied as 25 columns....
The Freeze 'N Squeeze DNA gel extraction kit uses a quick freeze-and-thaw cycle and centrifugation to draw 50-23,000 bp DNA out of agarose gel slices. The kit includes materials for 100 preps....
Biology Products: