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:8/27/2015)... MENLO PARK, Calif. , Aug. 27, 2015 /PRNewswire/ ... company in the emerging field of regenerative medicine, today ... two investor conferences in the month of September.  ... Officer, will present at Rodman & Renshaw,s 17th Annual ... 10:25am ET/7:25am PT at the St. Regis Hotel in ...
(Date:8/27/2015)... 27, 2015 HUYA Bioscience International (HUYA) today announced ... Japan Society of HTLV-1, held this week at the ... of the Society is to promote research on HTLV-1 ... medical technology and research related to these fields to ... "HUYA is proud to support this prestigious conference," said ...
(Date:8/27/2015)... (PRWEB) , ... August 27, 2015 , ... Inc. Magazine ... States, ranking iLab Solutions as number 1,361 in growth for the three years through ... the top 0.1% fastest-growing privately held organizations in the country. , “We are ...
(Date:8/27/2015)... TRIANGLE PARK, N.C. , Aug. 27, 2015 ... on the decision by FedEx, UPS and The ... of certain biological specimens classified as ,select agents, ... and long history of handling these sensitive shipments. ... knowledge of global transportation regulations, trained and certified ...
Breaking Biology Technology:Asterias Biotherapeutics to Present at Upcoming Investor Conferences 2HUYA Bioscience International Sponsors Japan Society Of HTLV-1 Annual Meeting 2HUYA Bioscience International Sponsors Japan Society Of HTLV-1 Annual Meeting 3HUYA Bioscience International Sponsors Japan Society Of HTLV-1 Annual Meeting 4iLab Solutions Named to 2015 Inc. 5000 List 2iLab Solutions Named to 2015 Inc. 5000 List 3Marken Ensures Safe Transportation Of Select Agents And Toxins 2
... Calif., Oct. 14 GenVault Corporation today,announces that ... Senior Vice,President of Business Development. Mr. Sutherland will ... for partnering,and licensing the company,s products and technologies ... Mr. Sutherland has more than 25 years ...
... Systems, Inc., (OTC Bulletin Board: IMDS) a pioneer ... that its,distributor, Laszlo Meszaros of Kardia Hungary Kft., ... for Budapest, Hungary., (Logo: http://www.newscom.com/cgi-bin/prnh/20040412/IMDSLOGO ... at the new MeDoc HealthCare Center,(MDHC) located in ...
... chosen to enable patient care services in Australia through ... ... 110th Annual Convention --,Mirixa Corporation, the leader in pharmacy-based patient ... Australia, announced,today that they have signed a definitive technology licensing ...
Cached Biology Technology:Mark Sutherland Joins GenVault as Senior Vice President, Business Development 2Imaging Diagnostic Systems Sells Its CT Laser Mammography System to Budapest, Hungary 2Mirixa Announces Agreement With the Pharmacy Guild of Australia 2Mirixa Announces Agreement With the Pharmacy Guild of Australia 3
(Date:8/6/2015)... Calif. , Aug. 6, 2015  Today, ... will visit Crossmatch ™ to learn firsthand ... and protect data. Crossmatch is a world leader ... technologies and expertise are helping federal agencies and ... and security.   "The vast majority ...
(Date:8/5/2015)... , Aug. 5, 2015 The biosensors market ... in applications, penetration into newer sectors, and development of ... global biosensors space has seen the entry of multiple ... so far. (Photo - http://photos.prnewswire.com/prnh/20150805/255570 ) ... Analysis of the Global Biosensors Market ( ...
(Date:7/31/2015)... julio de 2015 BGI llevará a cabo la ... 22 al 25 de octubre de 2015, en ... celebra su décimo aniversario este año. Desde su inauguración ... las reuniones anuales más influyentes del mundo en los ... conferencias científicas más dinámicas, entusiastas y amenas. ...
Breaking Biology News(10 mins):Rep. Honda to Visit Crossmatch in Redwood City 2Innovative Biosensors Incite Use in Non-Traditional Applications 2Innovative Biosensors Incite Use in Non-Traditional Applications 3Innovative Biosensors Incite Use in Non-Traditional Applications 4La 10ª Conferencia Internacional sobre Genómica (ICG-10) comienza en octubre 2La 10ª Conferencia Internacional sobre Genómica (ICG-10) comienza en octubre 3
... studied human brain samples to isolate a set of proteins ... shows an intriguing link between diseases and the evolution of ... of medical disability in the developed world according to the ... exceeds $300 billion. The brain is the most complex ...
... Federal Ministry of Education and Research (BMBF) will fund ... (FRM II) by German and international researchers to the ... years. The Helmholtz Research Centers Juelich, Berlin, and Geesthacht ... budgets. The basis for these grants is the cooperation ...
... It,s just a worm, a tiny soil-dwelling nematode worm ... biology as shown in a recent study authored by University ... on the circadian clock of the Caenorhabditis elegans ... Biology . "Circadian rhythms are important in all ...
Cached Biology News:The genetic basis of brain diseases 2The genetic basis of brain diseases 3German federal government bolsters neutron research in Garching 2German federal government bolsters neutron research in Garching 3Breakthrough in worm research has implications for human disease studies 2
Superior homology search software - in all the flavours of blast, with increased sensitivity and speed...
Protein 3D structure prediction, via threading. Easy to use....
... Standard Tray (3 per pack), 1. ... and blot processing.Automated staining of Coomassie ... and nucleic acid analysis.Prepares blots for ... detection.Programmable control of protocol, solution, volume, ...
DITHIOTHREITOL, 150UMOL, 1 EA. Dithiothreitol (DTT), 0.1 M Solution:, *0.1 M solution of DTT in high purity dH2O., *0.2 m filtered., *Storage: -20C. Category: SEQUENASE....
Biology Products: