Navigation Links
NREL and partners demonstrate quantum dots that assemble themselves
Date:2/20/2013

Scientists from the U.S. Department of Energy's National Renewable Energy Laboratory and other labs have demonstrated a process whereby quantum dots can self-assemble at optimal locations in nanowires, a breakthrough that could improve solar cells, quantum computing, and lighting devices.

A paper on the new technology, "Self-assembled Quantum Dots in a Nanowire System for Quantum Photonics," appears in the current issue of the scientific journal Nature Materials.

Quantum dots are tiny crystals of semiconductor a few billionths of a meter in diameter. At that size they exhibit beneficial behaviors of quantum physics such as forming electron-hole pairs and harvesting excess energy.

The scientists demonstrated how quantum dots can self-assemble at the apex of the gallium arsenide/aluminum gallium arsenide core/shell nanowire interface. Crucially, the quantum dots, besides being highly stable, can be positioned precisely relative to the nanowire's center. That precision, combined with the materials' ability to provide quantum confinement for both the electrons and the holes, makes the approach a potential game-changer.

Electrons and holes typically locate in the lowest energy position within the confines of high-energy materials in the nanostructures. But in the new demonstration, the electron and hole, overlapping in a near-ideal way, are confined in the quantum dot itself at high energy rather than located at the lowest energy states. In this case, that's the gallium-arsenide core. It's like hitting the bulls-eye rather than the periphery.

The quantum dots, as a result, are very bright, spectrally narrow and highly anti-bunched, displaying excellent optical properties even when they are located just a few nanometers from the surface a feature that even surprised the scientists.

"Some Swiss scientists announced that they had achieved this, but scientists at the conference had a hard time believing it,"
'/>"/>

Contact: David Glickson
david.glickson@nrel.gov
303-275-4097
DOE/National Renewable Energy Laboratory
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Organovo Partners With ZenBio to Create 3D Tissue Models
2. Transformation Dental Partners Launch Ground Breaking Cavity Prevention Program that Can Lower Tooth Decay Rates by 74%
3. Qualitas Health and Valicor Renewables Announce Strategic Partnership to Commercialize Algae-Based Omega-3 Supplements
4. Taylor-Wharton CryoScience 'Partners For Life' Awards Liquid Nitrogen Freezer to Comprehensive Cancer Center at University of Alabama at Birmingham
5. Tonicology LLC Partners with Taiwan's CGB, Corp. to Offer Pure Extracts of Rare Herbal Supplements
6. The Veterinary Bioscience Institute Partners with LabRoots to Produce Laboratory Animal Science BioConference Live
7. Touch Medical Media Splits From Touch Briefings, Launches a Series of Cutting Edge, Free to Access, Educational Resources and Signs an Updated Media Partnership With ECCO, The European CanCer Organisation Representing 60,000 Oncology Professionals
8. 5AM Solutions and LABVANTAGE Announce Partnership
9. GlycoCheck Announces Partnership in the United States with Vascular Health Sciences
10. Formedix Partners with Perceptive Informatics for Forthcoming Webcast, “Four Secrets to Using CDISC Standards to Enable Clinical Trial Efficiencies”
11. Wake Forest Innovations Partners with Veterinary Bioscience Institute to Develop Educational Programs for Life Science Professionals
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/15/2014)... 2014 The Microcompetition with Foreign DNA ... disease. One of these latent viruses is the Epstein ... rheumatoid arthritis (RA). Rheumatoid arthritis (RA) is a chronic ... by the theory, a study found that RA patients ... (1). , What is Microcompetition? , Dr. Hanan ...
(Date:1/15/2014)... Sunnyvale, CA (PRWEB) January 15, 2014 ... of high throughput research solutions, today announced that ... companies, has received delivery of Freeslate’s CM ... form screening. , Lupin, headquartered in Mumbai, ... quality, affordable generic and branded formulations and Active ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Date: Friday, ... p.m. , Location: Warrington Country Club, 1360 Almshouse Road, ... Foundation, the only national nonprofit organization solely dedicated to ... quality of life for those affected worldwide, will host ... Warrington Country Club in Warrington, Pa. , Each ...
(Date:1/14/2014)... , Jan. 14, 2014  3D Communications, a leading provider ... major scientific, regulatory, business, and media events in ... , today announced its former associate Virginia Cox , ... office. Virginia Cox re-joins ... Commissioner for the Office of External Affairs at the U.S. ...
Breaking Biology Technology:Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 2Study: Rheumatoid Arthritis (RA) Patients Have EBV; The CBCD Says this is Consistent with Microcompetition 3Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Former FDA Associate Commissioner Returns To 3D Communications 2
... calls it the "quiet crisis." , ,Others call ... are referring to the dearth of American youth actively ... and Mathematics) disciplines, an ominous trend that, if left ... the United States. , ,The nation's inability to sell ...
... and disposing of excess nuclear fuel may seem like ... in Janesville has obtained the rights to a technology ... NorthStar Nuclear Medicine, Inc. , an early-stage developer of ... treatment by processing small amounts of unused nuclear fuel ...
... Madison, Wis. - A collaborative project between the ... Institute of Technology in Haifa has shown that ... of genetic diseases. , , Superlink-Online , a program ... diseased genes in the genomes of affected families, has ...
Cached Biology Technology:TechnoJungle to highlight learning, innovation 2NorthStar finds cancer-fighting use for nuclear fuel 2UW links with Israeli school to locate genes 2UW links with Israeli school to locate genes 3
(Date:4/16/2014)... and bulbar muscular atrophy (SBMA) is a rare inherited ... atrophy. Researchers have long considered it to be essentially ... in the spinal cord and brainstem that control muscle ... the April 16, 2014 online issue of Neuron ... California, San Diego School of Medicine say novel mouse ...
(Date:4/16/2014)... The "brush border" a densely packed array ... surfaces of the cells that line our intestines., ... cells build this specialized structure, which is critical ... findings, published April 10 in the journal ... in brush border assembly and increase our understanding ...
(Date:4/16/2014)... do all of our movements, thoughts and feelings ... another, and recent studies have suggested that some of ... cells known as astrocytes may be listening in on, ... a new mouse study suggests that astrocytes might only ... when the neurons get really excited about something. This ...
Breaking Biology News(10 mins):Mutant protein in muscle linked to neuromuscular disorder 2Vanderbilt researchers discover how intestinal cells build nutrient-absorbing surface 2Vanderbilt researchers discover how intestinal cells build nutrient-absorbing surface 3Eavesdropping on brain cell chatter 2Eavesdropping on brain cell chatter 3
... scientists in the University of Leicester,s Department of Geology ... fossils right next door - in the University,s Chemistry ... huge amount of scientific information when studied using the ... to study tiny fossils or microscopic details of larger ...
...   DigitalPersona, Inc. , a global provider of ... CDS Monarch has deployed DigitalPersona® Pro Enterprise ... to provide secure access to electronic medical records. ... to more accurately track access to clinical software ...
... Ellen Jo Baron, Ph.D., D(ABMM), Professor Emerita, Stanford University ... 2012 ASM Founders Distinguished Service Award for her years ... can recall during my career in clinical microbiology, Baron has ... Michael Dunne, Ph.D., Executive Director of Research and Development, North ...
Cached Biology News:Scientists find gold-plated fossil solution 2CDS Monarch Deploys DigitalPersona Strong Authentication Solutions for Secure Access to Electronic Medical Records 2CDS Monarch Deploys DigitalPersona Strong Authentication Solutions for Secure Access to Electronic Medical Records 3The American Society for Microbiology honors Ellen Jo Baron 2The American Society for Microbiology honors Ellen Jo Baron 3
... new product number, created to easily match ... yet, please order under the old Sigma-Aldrich ... assistance. ID clarifier: tissue-culture treated ... cm 2 D H 245 ...
BD BioCoat Collagen IV 150 mm Culture Dishes...
...
...
Biology Products: