Navigation Links
Duke researchers coax bright white light from unexpected source
Date:12/18/2008

said. But "we love the defects that other people hate," Everitt said. "That's been the gift of nanostructured doped zinc oxide, emitting what your eye expects white light to look like."

In a report published May 10, 2006, in the research journal Nano Letters, Foreman, Everitt, Liu and co-researchers first disclosed they could induce a formulation of zinc oxide shaped into nanowires to absorb light from an ultraviolet laser and re-emit it as a "broadband visible emission of unprecedented brightness." The white light component was more than 1,000 times brighter than the ultraviolet component, they reported.

In a followup report, published July 2, 2007, in the journal Applied Physics Letters, the Duke researchers initiated what they expect to be a series of published papers exploring how various alterations affect the white light emissions.

"We've learned something about what makes the white light conversion happen, and what makes it happen so efficiently," Everitt said. The Duke team has already achieved efficiencies as high as 80 percent. But there are still technical issues to resolve tied to the operating temperatures of the phosphors and the power from the underlying ultraviolet LED.

"Our challenge has been getting a foundational understanding so we can understand what is physically possible and how close we are to achieving it," Everitt said.

Zinc oxide would be both a less-toxic and cheaper light source than the combinations used in today's commercial LEDs -- gallium nitride and cerium-doped yttrium oxide, they said. Cerium-doped yttrium oxide is also used in today's mercury-containing fluorescent bulbs, Everitt added.

Liu's lab originally stumbled on to the light emitting potential of sulfur-doped zinc oxide while studying its electronic conductivity. "We just lit it up with an ultraviolet laser and -- whammo -- there was a lot of white light coming out," Everitt said.


'/>"/>

Contact: Monte Basgall
monte.basgall@duke.edu
919-681-8057
Duke University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Researchers improve ability to write and store information on electronic devices
2. Long-awaited international ethical guidelines for biobank researchers
3. CU researchers shed light on light-emitting nanodevice
4. Stevens researchers provide new information about mass spectrometry
5. Researchers measure carbon nanotube interaction
6. Researchers underscore limitations of genetic ancestry tests
7. ASU researchers improve memory devices using nanotech
8. UD researchers race ahead with latest spintronics achievement
9. Researchers outline structure of largest nonvirus particle ever crystallized
10. Ames Laboratory researchers solve fuel-cell membrane structure conundrum
11. Researchers use magnetism to target cells to animal arteries
Post Your Comments:
*Name:
*Comment:
*Email:
(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)... SAN DIEGO, July 30, 2015   Senomyx , ... proprietary taste science technologies to discover, develop, and commercialize ... supply industries, today reported financial results for the second ... half of 2015, we remain on track to achieve ... and Chief Executive Officer of the Company. "Since our ...
(Date:7/30/2015)... LOUIS, July 30, 2015 HIGHLIGHTS:Q2 ... in 2014) , Reported sales were $697 million ... 2014.  Sales grew organically by 8%, and changes in ... acquisitions increased sales by 1%. , By business ... in Applied and 11% in SAFC Commercial. , ...
(Date:7/30/2015)... (PRWEB) , ... July 30, 2015 , ... ... for advanced fluid applications and designed for continuous operation up to 1500 bar. ... sterilization-in-place, ensuring safety, efficiency, and preventing toxic contamination. , The Pony™ NS2006L homogenizer ...
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 4SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 2SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 3SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 4SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 5SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 6SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 7SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 8SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 9Sigma-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 20GEA Announces the Pony™ NS2006L… a Self-contained, High Pressure Lab Homogenizer for Product Development Ensuring Maximum Efficiency and Safety 2
... , Blunt-end Cloning of DNA Isolated Using the ... , , , , , George Halley ... 1, 2002, , , , , , ... separate and analyze , DNA fragments. This method can be taken a ...
... , , , , , , ... , The term transgenic animals describes animals whose chromosomes , ... other species or not normally found in the host animal. , ... foreign DNA into oocytes or embryos (blastocysts). , ...
... , , , , , ... PatchMan, was tested under practical conditions at the Max-Planck-Institute , ... , , , , Eppendorf received ... MPI for a variety of patch clamp , experiments: , ...
Cached Biology Technology:Eppendorf Perfectprep Gel Cleanup Kit 2Eppendorf Perfectprep Gel Cleanup Kit 3Eppendorf Perfectprep Gel Cleanup Kit 4Eppendorf Perfectprep Gel Cleanup Kit 5Eppendorf Perfectprep Gel Cleanup Kit 6Transgenic Animals 2Transgenic Animals 3Transgenic Animals 4Transgenic Animals 5Transgenic Animals 6Transgenic Animals 7Transgenic Animals 8Transgenic Animals 9PatchMan - Test Report 2
(Date:7/21/2015)... NEW YORK , July 21, 2015 /PRNewswire/ ... critical systems, as seen in the recent U.S. ... enterprises a solution to the infosec conundrum, but ... data is stored. To address this dilemma, Biometrics-as-a-Service ... of its Biometric Tokenization SDK for third party ...
(Date:7/13/2015)... Jul. 13, 2015 NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce ... patent 62/188684 for BEHAVIORAL-DIRECTED AUTHENTIATION METHOD ... convenient and secure method to make payments.  With ... methods, introduced with its groundbreaking voice-direct payment patent ...
(Date:7/9/2015)... , July 9, 2015  Unchained Labs ... announcing its acquisition of Avid Nano. Avid Nano ... scattering (DLS) systems.    Also today, ... fastest and easiest to use protein sizing system. ... measures a protein,s hydrodynamic size, size distribution, aggregation ...
Breaking Biology News(10 mins):HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4NXT-ID Patents Behavior-Directed Payments 2NXT-ID Patents Behavior-Directed Payments 3NXT-ID Patents Behavior-Directed Payments 4Unchained Labs just can't get enough, acquires Avid Nano, rocks out the new pUNk! 2
... research shows an increased risk of ischemic stroke in postmenopausal ... found in baked goods, fried foods, and packaged products. Study ... journal published by Wiley-Blackwell on behalf of the American Neurological ... the stroke risk caused by a diet high in trans ...
... NY, February 29, 2012Although industrial parks are often ... which they reside, they can also consume environmental ... affect human health and quality of life. A ... ( http://www.liebertpub.com/ees ), a peer-reviewed journal from ...
... supercomputer has completed the first phase of an ... powerful scientific computing systems in the world. ... this month. The testing suite included leading scientific ... fusion, and combustion. Jaguar, manufactured by Cray ...
Cached Biology News:Postmenopausal women at greater risk of stroke from high trans fat intake 2Can industrial parks be more environmentally friendly? 2ORNL completes first phase of Titan supercomputer transition 2
Chicken polyclonal to ytzF ( Abpromise for all tested applications). Antigen: Full length protein...
Fetal Calf Serum Replacement (Bistec) serum...
...
Mouse monoclonal [Ley 37D/G6] to LKB1 ( Abpromise for all tested applications). entrezGeneID: 6794 SwissProtID: Q15831...
Biology Products: