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

Applying just the right amount of tension to a chain of carbon atoms can turn it from a metallic conductor to an insulator, according to Rice University scientists.

Stretching the material known as carbyne -- a hard-to-make, one-dimensional chain of carbon atoms -- by just 3 percent can begin to change its properties in ways that engineers might find useful for mechanically activated nanoscale electronics and optics.

The finding by Rice theoretical physicist Boris Yakobson and his colleagues appears in the American Chemical Society journal Nano Letters.

Until recently, carbyne has existed mostly in theory, though experimentalists have made some headway in creating small samples of the finicky material. The carbon chain would theoretically be the strongest material ever, if only someone could make it reliably.

The first-principle calculations by Yakobson and his co-authors, Rice postdoctoral researcher Vasilii Artyukhov and graduate student Mingjie Liu, show that stretching carbon chains activates the transition from conductor to insulator by widening the material's band gap. Band gaps, which free electrons must overcome to complete a circuit, give materials the semiconducting properties that make modern electronics possible.

In their previous work on carbyne, the researchers believed they saw hints of the transition, but they had to dig deeper to find that stretching would effectively turn the material into a switch.

Each carbon atom has four electrons available to form covalent bonds. In their relaxed state, the atoms in a carbyne chain would be more or less evenly spaced, with two bonds between them. But the atoms are never static, due to natural quantum uncertainty, which Yakobson said keeps them from slipping into a less-stable Peierls distortion.

"Peierls said one-dimensional metals are unstable and must become semiconductors or insulators," Yakobson said. "But it's not that simple,
'/>"/>

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:11/26/2014)... Continuing its award-winning streak, Nerium International, the ... Awards for outstanding creative achievement by its marketing and ... the organization’s top honor, in the Branding category for ... April of this year. The event showcased top speakers ... was awarded a Gold MarCom Award in the Special ...
(Date:11/26/2014)... Boston, MA (PRWEB) November 26, 2014 ... and collaboration company is proud to announce that Darren ... Development and Sales. Darren will drive the ... and positive customer experience. , Darren brings ... He has held key roles in channel operations, from ...
(Date:11/26/2014)... MINNEAPOLIS , Nov. 25, 2014 Bio-Techne ... it has appointed Robert Gavin to serve ... of the Protein Platforms Division.  Mr. Gavin will be ... business segment, which includes the ProteinSimple business acquired in ... San Jose, California -based ProteinSimple ...
(Date:11/24/2014)... DUBAI , UAE, November 24, 2014 ... prestigious "Sheikh Hamdan Bin Rashid Al Maktoum Awards for ... in Dubai, United Arab Emirates , ... http://photos.prnewswire.com/prnh/20141124/717861 ) , The Carter Center ... Medical Services is actively involved in numerous programs that ...
Breaking Biology Technology:Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2SoundConnect Appoints Director of Channel Development & Sales 2Bio?Techne Announces Appointment Of Robert Gavin As Leader Of New Protein Platforms Division 2Bio?Techne Announces Appointment Of Robert Gavin As Leader Of New Protein Platforms Division 3Five US Winners Among Recipients of Hamdan Medical Awards 2
... 4, 2011 InterMune, Inc. (NASDAQ: ITMN ) ... President of InterMune, will present at the Bank of America ... on May 11, 2011, at 1:00 p.m. PDT.   ... investors and other interested parties may log on to the ...
... a letter from Nicusa Capital urging BioClinica (Nasdaq: BIOC ... from incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy: ... Chairman of the Board BioClinica, Inc. 826 Newtown-Yardley Rd. Newtown, PA ... of BioClinica: As of May 4, 2011, Nicusa owns ...
... Inc. (Nasdaq: NXTM ), a leading manufacturer ... the first quarter of 2011 ended March  31, 2011, ... guidance range. (Logo: http://photos.prnewswire.com/prnh/20110503/MM94799LOGO) Net ... to a record $50.6 million compared with revenue of ...
Cached Biology Technology:This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 2This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 3This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 4This is a Letter From Nicusa Capital Urging BioClinica Shareholders to Vote AGAINST Proxy Proposal 2 and WITHHOLD Votes From Incumbent Directors Berg, Olukotun, Parker and Weinstein on 2011 Proxy 5NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 2NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 3NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 4NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 5NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 6NxStage® Reports Record Revenue for the First Quarter of Fiscal 2011 7
(Date:11/4/2014)... LAKE CITY, Nov. 5, 2014 – University of Utah ... enzymes to help jet fuel produce electricity without needing ... be used to power portable electronics, off-grid power and ... online today in the American Chemical Society journal ... electricity through a chemical reaction between a fuel and ...
(Date:11/4/2014)...   3D scanner developer targets ... Fuel3D , a developer of 3D scanning solutions, today announced ... (£4 million). This funding builds on the company,s initial $2.6 ... the way for the commercial launch of the company,s consumer ... led by Chimera Partners and will be used to ramp-up ...
(Date:11/3/2014)... LOS ANGELES , Nov. 3, 2014 /PRNewswire/ ... California -based life sciences company focused on ... eTNS system for the treatment of neurological ... Institute of Industrial Property has issued a Notice ... The patent application is co-owned by NeuroSigma and ...
Breaking Biology News(10 mins):Jet-fueled electricity at room temperature 2Fuel3D Secures $6.4 Million in Expansion Funding 2Fuel3D Secures $6.4 Million in Expansion Funding 3NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 2NeuroSigma Receives Notice of Allowance from the Mexican Institute of Industrial Property Covering Subcutaneous Trigeminal Nerve Stimulation (sTNS) 3
... (June 21, 2012) Autism Speaks, the world,s leading ... of new research grants totaling nearly $2.9 million in ... extraordinarily proud of Autism Speaks, not only for funding ... avenues to understanding autism," said Autism Speaks Co-founder Bob ...
... ocean infrastructure development to tap energy sources such as ... pile driving, the practice of pounding long, hollow steel ... energy turbines and other structures. But pile driving creates ... marine animals., Many scientists and regulators have assumed that ...
... world are preparing to address the urgent need to ... biodiversity. The Global Biodiversity Informatics Conference (GBIC) will ... and policy in Copenhagen, Denmark from 2-4 July. ... strategy and roadmap to make best use of the ...
Cached Biology News:Autism Speaks awards nearly $2.9 million to fund autism research 2Autism Speaks awards nearly $2.9 million to fund autism research 3Autism Speaks awards nearly $2.9 million to fund autism research 4Turning down the dial: Ocean energy development with less sound 2Turning down the dial: Ocean energy development with less sound 3Turning down the dial: Ocean energy development with less sound 4A new vision for harnessing data about life on Earth 2
Recorder REC-111 single-channel, 1. Category: Chromatography Systems & Accessories, Systems....
... for when you need to make your strain ... efficiency. Our services for preparing competent cells are ... custom competent cell service offers: ... Fast turnaround Quality control performance testing ...
Fast, sensitive quantitation of total MEK 1/2 concentration....
Argon Calibration Source...
Biology Products: