Navigation Links
Scientists mimic fireflies to make brighter LEDs
Date:1/8/2013

s, Bay, Vigneron, and colleagues first describe the intricate structures they saw when they examined firefly lanterns and then present how the same features could enhance LED design. Using scanning electron microscopes, the researchers identified structures such as nanoscale ribs and larger, misfit scales, on the fireflies' cuticles. When the researchers used computer simulations to model how the structures affected light transmission they found that the sharp edges of the jagged, misfit scales let out the most light. The finding was confirmed experimentally when the researchers observed the edges glowing the brightest when the cuticle was illuminated from below.

"We refer to the edge structures as having a factory roof shape," says Bay. "The tips of the scales protrude and have a tilted slope, like a factory roof." The protrusions repeat approximately every 10 micrometers, with a height of approximately 3 micrometers. "In the beginning we thought smaller nanoscale structures would be most important, but surprisingly in the end we found the structure that was the most effective in improving light extraction was this big-scale structure," says Bay.

Human-made light-emitting devices like LEDs face the same internal reflection problems as fireflies' lanterns and Bay and her colleagues thought a factory roof-shaped coating could make LEDs brighter. In the second Optics Express paper published today, which is included in the Energy Express section of the journal, the researchers describe the method they used to create a jagged overlayer on top of a standard gallium nitride LED. Nicolas Andr, a postdoctoral researcher at the University of Sherbrooke in Canada, deposited a layer of light-sensitive material on top of the LEDs and then exposed sections with a laser to create the triangular factory-roof profile. Since the LEDs were made from a material that slowed light even more than the fireflies' cuticle, the scientists adjusted the dimensions o
'/>"/>

Contact: Angela Stark
astark@osa.org
202-416-1443
Optical Society of America
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Stanford scientists develop gene therapy approach to grow blood vessels in ischemic limbs
2. Queens scientists seek vaccine for Pseudomonas infection
3. Scientists produce eye structures from human blood-derived stem cells
4. American Society of Plant Biologists honors early career women scientists
5. Brandeis scientists win prestigious prize for circadian rhythms research
6. Scientists discover new method of proton transfer
7. Salk scientists open new window into how cancers override cellular growth controls
8. WileyChina.com - Now Featuring Bespoke Pages for China’s Life Scientists
9. Scientists win $2 million to study new pathway in development and maintenance of lymphoma
10. UGA scientists reveal genetic mutation depicted in van Goghs sunflower paintings
11. Genetic mutation depicted in van Goghs sunflower paintings revealed by scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists mimic fireflies to make brighter LEDs
(Date:8/21/2014)... Aug. 21, 2014 /PRNewswire-iReach/ -- LiveScan Service ... agreed to a partnership with Gabriel Health Institute, ... fastest growing Certified Nursing Assistant preparatory schools. ...  an exclusive member of Binary,s LiveScan service provider,s ... will improve its service capabilities by widening ...
(Date:8/21/2014)... water window? It consists of radiations in the 3.3 ... the water in biological tissues. New theoretical findings show ... the water window. These could be the basis of ... the biological samples or to be used in high-precision ... mechanism needed to efficiently generate the harmonic radiationswhich are ...
(Date:8/21/2014)... successfully replicated one of the crucial steps in photosynthesis, ... which could manufacture hydrogen as a fuel. , "Water ... exciting prospect to use them to create hydrogen, and ... from the ARC Centre of Excellence for Translational Photosynthesis ... offers potential as a zero-carbon replacement for petroleum products, ...
Breaking Biology News(10 mins):LiveScan Provider Binary Biometrics Announces Partnership with Preeminent CNA School, Gabriel Health Institute to Expand Services in Orlando Region 2LiveScan Provider Binary Biometrics Announces Partnership with Preeminent CNA School, Gabriel Health Institute to Expand Services in Orlando Region 3Water window imaging opportunity 2Water and sunlight the formula for sustainable fuel 2
... the unique mouse line that is resistant to cancer have ... that white blood cells in these mice overwhelm normal defenses ... a journal of the Academy of Cancer Immunology, posted on ... M.D., of Wake Forest University School of Medicine and colleagues ...
... as during periods of stress may increase the growth rate ... showed that an increase in norepinephrine, a stress hormone, can ... break down of the tissue around the tumor cells and ... From there, they can travel to another location in the ...
... St. Jude Children's Research Hospital have demonstrated in a mouse ... retinoblastoma that not only greatly reduces the size of the ... with standard chemotherapy. The treatment also appears to be suitable ... and is simple enough for widespread use even in countries ...
Cached Biology News:White blood cells of cancer-resistant mice overwhelm natural defenses of cancer cells 2Stress hormones may play new role in speeding up cancer growth 2Stress hormones may play new role in speeding up cancer growth 3St. Jude announces breakthrough in eye cancer treatment 2St. Jude announces breakthrough in eye cancer treatment 3St. Jude announces breakthrough in eye cancer treatment 4
(Date:8/22/2014)... GUELPH, ON , Aug. 22, 2014 /PRNewswire/ - BIOREM Inc. (TSXV: ... and six month periods ended June 30, 2014.  Biorem,s complete 2014 second ... ). Financial Summary:Three-months ended June 30, , Six-months ... , 2014 , 2013 , 2014 ... , 4,433 , 9,195 Gross profit , ...
(Date:8/22/2014)... In a study published today (August 22nd), in ... at the Champalimaud Neuroscience Programme establish the effect ... combination of advanced genetic and optical techniques., "Serotonin ... in a wide range of brain functions, from ... regulation of complex emotional behaviours, This neurotransmitter is ...
(Date:8/22/2014)... are intensively investigated for application as catalysts, ... and components in photonics and molecular electronics. ... for understanding physical and chemical properties, has ... USA, have demonstrated that high-resolution electron microscopy ... structure in which all gold atoms are ...
(Date:8/22/2014)... The Global and China Diabetes Drugs Industry ... state of the Diabetes Drug industry in Global and ... the industry, including definitions, applications and industry chain structure. ... provided with a focus on history, developments, trends and ... international and Chinese situation is also offered. , The ...
Breaking Biology Technology:Biorem Reports 2014 Second Quarter Results 2Biorem Reports 2014 Second Quarter Results 3From happiness to pain: Understanding serotonin's function 2A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy 2Diabetes Drugs Industry Growth Analysis in Global, China Regions Research Report Available at DeepResearchReports.com 2Diabetes Drugs Industry Growth Analysis in Global, China Regions Research Report Available at DeepResearchReports.com 3
... antibody isotyping in only 5 minutes , ... Holmes Peter L.,Pingerelli ,Stratagene Cloning Systems, Inc. ... is a,simple, rapid and sensitive method for identifying ... IsoDetect test card is a self-contained assay,using colloidal ...
... pathways , , Li Xu Tim ... Enhancer elements are the convergent points for many ... assessment of the in,vivo activation of these pathways, ... signal transduction pathway cis-reporting systems. Each of the ...
... with high-titer efficiency and larger insert,potential ... Expression Libraries , Katherine Felts Kim ... Waesche Peter Vaillancourt ,Stratagene , We ... libraries inserted into the,high-titer retroviral vector pFB. ...
Cached Biology Technology:Simple, Sensitive Isotyping of Mouse Monoclonal Antibodies 2Simple, Sensitive Isotyping of Mouse Monoclonal Antibodies 3Simple, Sensitive Isotyping of Mouse Monoclonal Antibodies 4Simple, Sensitive Isotyping of Mouse Monoclonal Antibodies 5Signal Transduction Reporting Systems Using Cis-Acting Enhancer,Elements 2Signal Transduction Reporting Systems Using Cis-Acting Enhancer,Elements 3Signal Transduction Reporting Systems Using Cis-Acting Enhancer,Elements 4Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 2Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 3Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 4Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 5Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 6Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 7Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 8Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 9Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 10Functional Cloning Using,ViraPort Retroviral cDNA Expression Libraries 11