Navigation Links
Perfectly doped quantum dots yield colors to dye for
Date:5/10/2013

Quantum dots are tiny nanocrystals with extraordinary optical and electrical properties with possible uses in dye production, bioimaging, and solar energy production. Researchers at the University of Illinois at Chicago have developed a way to introduce precisely four copper ions into each and every quantum dot.

The introduction of these "guest" ions, called doping, opens up possibilities for fine-tuning the optical properties of the quantum dots and producing spectacular colors.

"When the crystallinity is perfect, the quantum dots do something that no one expected--they become very emissive and end up being the world's best dye," says Preston Snee, assistant professor of chemistry at UIC and principal investigator on the study.

The results are reported in the journal ACS Nano, available online in advance of print publication. Incorporating guest ions into the crystal lattice can be very challenging, says UIC graduate student Ali Jawaid, first author of the paper.

Controlling the number of ions in each quantum dot is tricky. Merely targeting an average number of guest ions will not produce quantum dots with optimal electrical and optical properties.

Jawaid developed a procedure that reliably produces perfect quantum dots, each doped with exactly four copper ions. Snee believes the method will enable them to substitute other guest ions with the same consistent results.

"This opens up the opportunity to study a wide array of doped quantum dot systems," he said.


'/>"/>

Contact: Jeanne Galatzer-Levy
jgala@uic.edu
312-996-1583
University of Illinois at Chicago
Source:Eurekalert

Page: 1

Related biology technology :

1. Building quantum states with individual silicon atoms
2. Quantum computers counting on carbon nanotubes
3. Laser-like photons signal major step towards quantum Internet
4. Nature: Smallest vibration sensor in the quantum world
5. Major grant to investigate limits of quantum theory
6. NIST mechanical micro-drum used as quantum memory
7. NIST quantum refrigerator offers extreme cooling and convenience
8. UCSB physicists make discovery in the quantum realm
9. Quantum Cures Announces Breakthrough Approach for Researchers Seeking Cures for Orphan and Rare Diseases
10. Connecting the (quantum) dots
11. NREL and partners demonstrate quantum dots that assemble themselves
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/20/2014)... improve the health of your heart, researchers have discovered. ... a standard TENS machine like those designed to relieve ... the small raised flap at the front of the ... The stimulation changed the influence of the nervous system ... can drive failing hearts too hard. , Professor Jim ...
(Date:8/19/2014)... Research and Markets  has announced the addition of ... Report" report to their offering. This report ... US$ Thousands by the following Product Segments: Media, Sera, and Reagents. ... Canada , Japan , ... Latin America . Annual estimates and forecasts are provided ...
(Date:8/19/2014)... XenoTech announces an exclusive partnership ... production from bioactive small molecules. Based on ... enables convenient and timely assessment of critical metabolite ... President of Commercial Operations, Christian Darabant, “the value ... can be measured directly by comparison with the ...
(Date:8/19/2014)... /PRNewswire/ - iCo Therapeutics Inc. ("iCo" or "the Company") ... its Oral Amphotericin B (Oral Amp B) drug ... by ImmuneCarta®, the immune monitoring business unit of ... Oral Amp B in reactivating latent HIV viral ... treatment with antiretroviral therapy. Memory ...
Breaking Biology Technology:'Tickling' your ear could be good for your heart 2Global Cell and Tissue Culture Supplies - Strategic Business Report 2014 2Beyond Metabolite Identification, Testable Quantities Now Offered by XenoTech 2Beyond Metabolite Identification, Testable Quantities Now Offered by XenoTech 3iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 2iCo Therapeutics Announces Positive Oral Amphotericin B Study Results 3
... , GAITHERSBURG, Md., Aug. 27 ... has entered into a purchase agreement with a single institutional investor for ... purchase 4,000,000 shares of its common stock. The shares of common ... of common stock and 0.50 warrants to purchase one share of common ...
... ... explosive new work of fiction that could well be tomorrow,s scientific fact. , ... Newport Beach, Calif. (PRWEB) August 27, 2009 -- The Last ... winning reporter deeply devoted to his ten year old daughter who is dying of a fatal ...
... Korean scientists have succeeded in engineering the bacterium E. ... published in the journal Biotechnology and Bioengineering , ... important chemical which is traditionally created using fossil fuels. ... an important platform chemical with a wide range of ...
Cached Biology Technology:GenVec Announces Registered Offering of $6 Million in Common Stock and Warrants 2GenVec Announces Registered Offering of $6 Million in Common Stock and Warrants 3Provocative New Fiction Makes for a Fascinating, Fast Paced Read 2Pioneering research succeeds in producing industrially vital chemical through engineered bacteria 2
(Date:8/19/2014)... is available in German . ... intermittent energy sources. If a large amount of electricity is ... excess energy will have to be stored during productive periods ... storage capacities are far from adequate for the purpose. Science ... important focus lies on battery systems that used to be ...
(Date:8/19/2014)... the world, leprosy and tuberculosis live side-by-side. Worldwide ... per year, with nearly all of them occurring ... vaccine Bacille Calmette-Guerin, or BCG, provides only partial ... more potent vaccine is needed to combat both ... weapon against both diseases., In a study published ...
(Date:8/19/2014)... identified a biomarker strongly associated with basal-like breast ... to many types of chemotherapy. The biomarker, a ... new therapeutics designed to treat this often deadly ... from The Cancer Genome Atlas, molecular biologists Curt ... computational and bioinformatics techniques to detect patterns of ...
Breaking Biology News(10 mins):Asian inventions dominate energy storage systems 2Asian inventions dominate energy storage systems 3New vaccine shows promise as stronger weapon against both tuberculosis and leprosy 2Biomarker in an aggressive breast cancer is identified 2Biomarker in an aggressive breast cancer is identified 3
... from more than 850 scientific, technical and educational presentations ... Meeting, Frontiers in Optics (FiO) 2011, being held Oct. 16 ... hotels in San Jose, Calif. Held in conjunction with Laser ... (APS) Division of Laser Science (DLS), the meeting will cover ...
... Journal of Visualized Experiments (JoVE) will partner with ... information through open access. JoVE is the first ... MEDLINE. Zeiss, a world-leading manufacturer of microscope technology based ... access video articles. For the three articles selected for ...
... channels exist not only in nature microscopical water channels ... they ensure that water can be transported through the protective ... Sweden, have discovered that one type of the body,s water ... , which may be significant in the treatment of several ...
Cached Biology News:Optics innovations to be showcased during OSA's Annual Meeting, Frontiers in Optics 2011 2Optics innovations to be showcased during OSA's Annual Meeting, Frontiers in Optics 2011 3Optics innovations to be showcased during OSA's Annual Meeting, Frontiers in Optics 2011 4Water channels in the body help cells remain in balance 2
Recombinant DNA polymerase from Thermus aquaticus expressed in E. coli; 5 units/L; 1 tube of 1, 000 units enzyme/tube w/Buffer II and MgCl2...
Taq DNA Polymerase (T. aquaticus), 4 x 250 units. For PCR and other procedures requiring DNA polymerase activity at elevated temperatures. Category: Nucleotides & Enzymes & Biochemicals, Modifying En...
... DNA Polymerase is a chemically modified form ... moiety is attached to the enzyme, the ... first ramp of thermal cycling (when the ... the enzyme is inactive. The result is ...
Taq DNA Polymerase (cloned), 250 units. Category: Nucleotides & Enzymes & Biochemicals, Modifying Enzymes, Polymerases....
Biology Products: