Navigation Links
U-M physicists create first atomic-scale map of quantum dots
Date:9/29/2009

ANN ARBOR, Mich.---University of Michigan physicists have created the first atomic-scale maps of quantum dots, a major step toward the goal of producing "designer dots" that can be tailored for specific applications.

Quantum dots---often called artificial atoms or nanoparticles---are tiny semiconductor crystals with wide-ranging potential applications in computing, photovoltaic cells, light-emitting devices and other technologies. Each dot is a well-ordered cluster of atoms, 10 to 50 atoms in diameter.

Engineers are gaining the ability to manipulate the atoms in quantum dots to control their properties and behavior, through a process called directed assembly. But progress has been slowed, until now, by the lack of atomic-scale information about the structure and chemical makeup of quantum dots.

The new atomic-scale maps will help fill that knowledge gap, clearing the path to more rapid progress in the field of quantum-dot directed assembly, said Roy Clarke, U-M professor of physics and corresponding author of a paper on the topic published online Sept. 27 in the journal Nature Nanotechnology.

Lead author of the paper is Divine Kumah of the U-M's Applied Physics Program, who conducted the research for his doctoral dissertation.

"I liken it to exploration in the olden days," Clarke said of dot mapping. "You find a new continent and initially all you see is the vague outline of something through the mist. Then you land on it and go into the interior and really map it out, square inch by square inch.

"Researchers have been able to chart the outline of these quantum dots for quite a while. But this is the first time that anybody has been able to map them at the atomic level, to go in and see where the atoms are positioned, as well as their chemical composition. It's a very significant breakthrough."

To create the maps, Clarke's team illuminated the dots with a brilliant X-ray photon beam at A
'/>"/>

Contact: Jim Erickson
ericksn@umich.edu
734-647-1842
University of Michigan
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Physicists at UC Santa Barbara make discovery in quantum mechanics
2. NYU physicists find way to explore microscopic systems through holographic video
3. Nanophysicists find unexpected magnetic effect
4. Physicists discover important step for making light crystals
5. U of T physicists squeeze light to quantum limit
6. McGill physicists find a new state of matter in a transistor
7. Physicists tweak quantum force, reducing barrier to tiny devices
8. UBC physicists develop impossible technique to study and develop superconductors
9. Discovery by UC Riverside physicists could enable development of faster computers
10. New unifying theory of lasers advanced by physicists
11. Physicists saved from drowning in complexities of wetting theory
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
U-M physicists create first atomic-scale map of quantum dots
(Date:7/24/2014)... July 24, 2014 -- Keryx Biopharmaceuticals, Inc. (Nasdaq:KERX) (the ... randomized, active control Phase 3 study of Zerenex (ferric ... for the treatment of hyperphosphatemia in patients with end-stage ... binding and iRon delivery with FErric CiTrate in EsrD) ... the American Society of Nephrology ( JASN ). ...
(Date:7/24/2014)... 24, 2014 Gain recognition for ... Chain of the biotech industry. Nominations are now ... brought to you by the Bio Supply ... supply chain management professionals for the past 7 ... of the Biotech industry – Manufacturers, Service Providers, ...
(Date:7/24/2014)... , July 24, 2014  Asterias Biotherapeutics, Inc. ... emerging field of regenerative medicine, announced today that ... presentation to investors on Tuesday, July 29, 2014, ... presentation will include an overview of Asterias, business ... webcast, visit http://www.ustream.tv/channel/asterias-biotherapeutics at least 15 ...
(Date:7/24/2014)... trained personnel, and detection dogs to safeguard airports ... revolutionary new electronic chip with nano-sized chemical sensors ... , The groundbreaking nanotechnology-inspired sensor, devised by Prof. ... of Chemistry and Center for Nanoscience and Nanotechnology, ... up the scent of explosives molecules better than ...
Breaking Biology Technology:Zerenex (ferric citrate) long-term Phase 3 study results published in JASN 2Zerenex (ferric citrate) long-term Phase 3 study results published in JASN 3Zerenex (ferric citrate) long-term Phase 3 study results published in JASN 4Call for Submission: BSMA’s Supply Chain Management Innovation Awards 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 3Asterias Biotherapeutics Announces Live Investor Webcast 2Asterias Biotherapeutics Announces Live Investor Webcast 3Asterias Biotherapeutics Announces Live Investor Webcast 4Nano-sized chip 'sniffs out' explosives far better than trained dogs 2
... Clarient, Inc.,(Nasdaq: CLRT ), a premier anatomic ... and the pharmaceutical industry,today announced that, effective June ... join Clarient as Senior Vice President and Chief,Financial ... experience as a public,company CFO in life sciences ...
... 28 Sequenom, Inc. (Nasdaq:,SQNM) today announced that a live audio ... investor briefing event,"Sequenom: The Future of Noninvasive Prenatal Diagnostics." Details of ... Sequenom: The Future of Noninvasive Prenatal Diagnostics, When: ... time, Where: http://www.sequenom.com , Agenda: ...
... 28 SoluLinK, Inc., a leader in,next-generation ... announce the,introduction of a new product, NanoLink(TM) ... highest biotin-binding,capacity of any commercially available polymer-encapsulated ... for high throughput robotic applications where high ...
Cached Biology Technology:Clarient Names Raymond J. Land Senior Vice President and Chief Financial Officer 2Clarient Names Raymond J. Land Senior Vice President and Chief Financial Officer 3Clarient Names Raymond J. Land Senior Vice President and Chief Financial Officer 4Clarient Names Raymond J. Land Senior Vice President and Chief Financial Officer 5Sequenom to Webcast Analyst and Investor Briefing Presentation on June 3 2SoluLinK Introduces NanoLink(TM) Streptavidin Magnetic Microspheres 2
(Date:7/24/2014)... molecules, which have similar counterparts in humans, affect the ... nerve signals into the hippocampus, an area of the ... and the creation of memories. The results of the ... . , Brain function depends on the active communication ... neurons are woven together into a dense network where ...
(Date:7/24/2014)... For years, researchers and patients have hoped that ... type in the bodycould provide insight into numerous diseases ... has been hampered by the inability to transfer research ... counterparts, in part because human ESCs are "primed" and ... Thorold Theunissen, Benjamin Powell, and Haoyi Wang, who are ...
(Date:7/24/2014)... of researchers led by the University of York has ... in the Western Indian Ocean. , The results, ... to a revolution in the management of marine protected ... than 11,000 km in the region now under ... zones of the seas and coasts designed to protect ...
Breaking Biology News(10 mins):A protein couple controls flow of information into the brain's memory center 2A protein couple controls flow of information into the brain's memory center 3A protein couple controls flow of information into the brain's memory center 4Whitehead Institute researchers create 'naïve' pluripotent human embryonic stem cells 2Western Indian Ocean communities play vital role in conservation 2
... nation that stretches from coast to coast to coast. But ... climate change? Yves Glinas, associate professor in Concordia,s Department of ... element: iron. In a study published in Nature ... and graduate Alexandre Ouellet, as well as McGill colleague Alfonso ...
... 14, 2012 The latest episode in the American ... podcast series describes the development of a new test ... Amid concerns about the threat of terrorist attacks, ... and other nations. One such team has developed a ...
... March 14, 2012 UC Irvine researchers have discovered how ... that causes major gastrointestinal distress in humans, thrives in the ... it. Their findings help explain why Salmonella ... possible treatments. Most people infected with Salmonella suffer ...
Cached Biology News:Fielding questions about climate change 2New test could help track down and prosecute terrorists 2UCI-led study uncovers how Salmonella avoids the body's immune response 2
... Western Blot Recycling Kit is effective ... blots that have been developed with ... isotopes. It is not recommended for ... etc.), as it is not possible ...
Applications: Western blotting ...
Ethylene glycol-bis(2-aminoethyl ether)-N,N,N',N'-tetraacetic acid, Molecular Biology Grade...
Required to perform reference file generation, flatfield calibration and performance verification processes on the GSD-501...
Biology Products: