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

DURHAM, N.C. -- Duke University and United States Army scientists have found that a cheap and nontoxic sunburn and diaper rash preventative can be made to produce brilliant light best suited to the human eye.

Duke adjunct physics professor Henry Everitt, chemistry professor Jie Liu and their graduate student John Foreman have discovered that adding sulfur to ultra-fine powders of commonplace zinc oxide at about 1,000 degrees centigrade allows the preparation to convert invisible ultraviolet light into a remarkably bright and natural form of white light.

They are now probing the solid state chemistry and physics of various combinations of those ingredients to deduce an optimal design for a new kind of illumination. Everitt and Liu have applied for a patent on using the preparations as a light source. "Our target would be to help make solid state lighting with better characteristics than current fluorescent ones," said Everitt, who also works with Foreman at the Army's Redstone Arsenal in Huntsville, Ala.

The researchers said they are producing white light centered in the green part of the spectrum by forming the sulfur-doped preparation into a material called a phosphor. The phosphor converts the excited frequencies from an ultraviolet light emitting diode (LED) into glowing white light.

Nanometer-diameter zinc oxide powders are being prepared by Liu's research group, which focuses on the chemistry of nanomaterials. He is Duke's Jerry G. and Patricia Crawford Hubbard Professor of Chemistry. They are then being tested at the Aviation and Missile Research, Development and Engineering Center at Redstone Arsenal by Everitt, an Army senior research scientist, and Foreman, an Army research physicist.

The researchers are also exploring using electricity alone to trigger the visible emissions without need for an ultraviolet light trigger.

The Army has selected the project for priority funding through a competitiv
'/>"/>

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:8/31/2014)... August 31, 2014 2014 ... is a professional and in-depth research report ... basic Polyacrylamide information, including Polyacrylamide definition, classification, ... as industry overview. This research covers the ... well as global industry analysis covering macroeconomic ...
(Date:8/29/2014)... The global companion diagnostics market ... It is expected to grow at a CAGR ... valued at $1.8 billion in 2013, according to ... , For more information regarding analysis details and ... research report, titled “Companion Diagnostics Market (Breast Cancer, ...
(Date:8/29/2014)... August 29, 2014 Three Lawrence ... 2014 Hydrogen Production R&D Award for ... splitting water using sunlight. , Shared with collaborators ... the University of Nevada, Las Vegas (UNLV), the ... models of photoelectrochemical solar-hydrogen production and corrosion processes. ...
(Date:8/28/2014)... August 28, 2014 Best Sanitizers, Inc., ... the food processing industry, is asking industry professionals to ... comparison of the E2 soap they’re currently using to ... Soap . Hand hygiene is critical to fighting ... processing environment. Six key criteria are identified to evaluate ...
Breaking Biology Technology:International Polyacrylamide Industry & Copper Iodide Market Data Analysis Now Available at DeepResearchReports.com 2International Polyacrylamide Industry & Copper Iodide Market Data Analysis Now Available at DeepResearchReports.com 3Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 2Companion Diagnostics Market to Hit $5.6 Billion in 2019: Transparency Market Research 3Livermore Team Awarded for Hydrogen Production Research 2Best Sanitizers, Inc. Asks Food Industry Professionals: With Fall Harvest On the Way, Is Your E2 Hand Soap Up to the Task? 2
... am ET, 9:00 am CT, LENEXA, Kan., April ... will release its financial results for the,third quarter of ... will,host a teleconference call at 10:00 am Eastern Time ... There will be a question-and-answer,session directly following the presentation ...
... DIEGO, April 29 Cardium Therapeutics,(Amex: CXM ... today that,InnerCool,s endovascular Celsius Control System was featured ... segment (episode 5) aired April,25, 2008, and is ... 11:30 p.m.,(ET/PT) on May 9, 2008. Please visit, ...
... Bristol-Myers Squibb,Company (NYSE: BMY ) announced today that ... notes: $600 million in aggregate principal amount of,5.450% notes ... principal amount,of 6.125% notes due May 1, 2038 in ... LLC, J.P. Morgan Securities Inc., and Morgan,Stanley are acting ...
Cached Biology Technology:Mediware to Report Third Quarter 2008 Financial Results on Tuesday, May 6th 2Cardium Reports on Science Channel Series Featuring InnerCool's Endovascular Cooling During Brain Surgery at Stanford University 2Cardium Reports on Science Channel Series Featuring InnerCool's Endovascular Cooling During Brain Surgery at Stanford University 3Cardium Reports on Science Channel Series Featuring InnerCool's Endovascular Cooling During Brain Surgery at Stanford University 4Cardium Reports on Science Channel Series Featuring InnerCool's Endovascular Cooling During Brain Surgery at Stanford University 5Cardium Reports on Science Channel Series Featuring InnerCool's Endovascular Cooling During Brain Surgery at Stanford University 6Bristol-Myers Squibb Issues $1.6 Billion of Senior Notes 2
(Date:9/1/2014)... diet showed some modest improvement in the last decade ... consumption of unhealthy trans fats, but the gap in ... poor. , , An unhealthy diet is closely linked ... healthy diet is an important part of the strategy ... diet quality is important because it can offer guidance ...
(Date:9/1/2014)... About 50 years ago, electron microscopy revealed the ... move around and disappear. But scientists still don,t know ... collections of proteins are believed to be crucial to ... a new approach to disease treatment., In the ... a call to investigators from various backgrounds, from biophysics ...
(Date:8/31/2014)... the highly infectious bacteria C. diff , that ... by a team at the University of Leicester. , ... that it is possible to identify the unique ,smell, ... rapid diagnosis of the condition., What is more, the ... different strains of the disease simply from their smell ...
Breaking Biology News(10 mins):Quality of US diet improves, gap widens for quality between rich and poor 2Quality of US diet improves, gap widens for quality between rich and poor 3Scientists call for investigation of mysterious cloud-like collections in cells 2Scientists develop 'electronic nose' for rapid detection of C. diff infection 2
... A study in the January 3 issue of the ... the risk of hereditary retinoblastoma survivors developing specific subtypes ... persists for decades after the original retinoblastoma diagnosis. The ... these patients, the authors say. , Retinoblastoma is ...
... of scientists has discovered that the ubiquitous bacteria that ... the human digestive system since modern man migrated from ... today (7 February) by the journal Nature, not only ... also offers a new way to study the migration ...
... from Wake Forest University School of Medicine are the ... changes in prostate and breast cancer cells that may ... imply that emotional stress may contribute to the development ... cancer treatments," said George Kulik, D.V.M., Ph.D., an assistant ...
Cached Biology News:Study examines risk of soft tissue sarcomas in hereditary retinoblastoma survivors 2Prehistoric origins of stomach ulcers uncovered 2Stress may help cancer cells resist treatment, research shows 2
... CE 4100 high pressure pump with ... with software drive compensation, reducing pulsing to ... selectable in 0.001mL steps. , The pump ... bio-compatible., Pumps may be programmed from their ...
... filter paper sandwiches are composed of a ... of thick filter paper that are preassembled ... sandwich. These 7 x 8.5 cm membrane ... Ready Gel-sized gels and are supplied as ...
... assay kit I provides reagents and a protein ... of reducing agents and detergents. The RC DC ... includes reagents and standards sufficient for 500 standard ... RC reagent II, 250 ml alkaline copper tartrate ...
... is a state-of-the-art separation system using the ... The Eclipse integrates easily with Wyatts multi-angle ... as well as the Optilab DSP. The ... mass distributions of the particles/molecules separated by ...
Biology Products: