Navigation Links
Method slashes quantum dot costs by 80 percent

ability to absorb high-energy photons of ultraviolet light and re-emit them as photons of visible light. They glow different colors, depending on the size, shifting from the red to the blue end of the spectrum as the crystals get smaller.

The reproducible synthesis of high-quality quantum dots became a reality in the early 1990s when researchers at MIT pioneered a new method of producing quantum dots with uniform sizes and well-defined optical signatures. The basic recipe for making quantum dots hasn't changed much since it was first developed. A solvent is heated to almost 500 degrees Fahrenheit, and solutions containing cadmium and selenium compounds are injected. They chemically decompose and recombine as pure CdSe nanoparticles. Once these nanocrystals form, scientists can adjust their optical properties by growing them to precisely the size they want by adjusting the cooking time.

The solvent originally used for this process was trioctylphosphine oxide, or TOPO, which costs more than $150 per liter. Later, other scientists introduced a new recipe by replacing TOPO with a mixture of ODE and oleic acid.

Wong said the CBEN research team, which included CBEN Director Vicki Colvin, professor of chemistry, and Nikos Mantzaris, assistant professor of chemical and biomolecular engineering and of bioengineering, had some initial doubts about whether heat-transfer fluids could be substituted for ODE.

"They were cheap and they didn't break down at high temperatures, but no one uses these compounds for chemical reactions," said Wong. In addition to finding that other quantum dot nanostructures could be made in heat- transfer fluids, the team concluded that any solvent could be used to replace ODE. Thanks to a mathematical modeling approach developed by Mantzaris, the team now has a method for predicting the particle size and growth behavior of quantum dots based on only three physical properties of a given solvent: viscosity, surface free
'"/>

Source:Rice University


Page: 1 2 3

Related biology news :

1. New Mixing Method for Microchip-Sized Labs
2. Computational Method Speeds Mapping of Cell Signaling Networks
3. New nanosensor uses quantum dots to detect DNA
4. Protein enables discovery of quantum effect in photosynthesis
5. Health costs soar as 60 million Americans classed as obese
6. Study calculates patient time costs associated with cancer care
7. Just the expectation of a mirthful laughter experience boosts endorphins 27 percent, HGH 87 percent
8. Septum keeps neurons in synch, can reduce epileptic seizures by 90 percent
9. Quitting smoking reduces risk of lung cancer mortality by 70 percent
10. Re-analysis of cigarettes confirms tobacco companies increased addictive nicotine 11 percent
11. Action video games sharpen vision 20 percent
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Method slashes quantum dot costs percent

(Date:4/17/2014)... One day about eight years ago, Katia Silvera ... and her father were on a field trip in a ... orchid they had never seen before. , Unable to identify ... The orchid turned out to be an unnamed species. ... silverarum . , "Lophiaris" is the genus name, comprising about ...
(Date:4/17/2014)... of forests in the Amazon help create tinderbox ... rapid and widespread forest loss during drought years, ... show that forests in the Amazon could reach ... forest fires lead to large-scale loss of trees, ... professor of geography, Penn State. , "We documented ...
(Date:4/17/2014)... reporting in the Cell Press journal Current Biology ... with rather novel sex lives. The Brazilian insects, which ... Neotrogla , are the first example of an ... has been identified in several different animals, Neotrogla ... organ is also reversed," says Kazunori Yoshizawa from Hokkaido ...
Breaking Biology News(10 mins):Orchid named after UC Riverside researcher 2Orchid named after UC Riverside researcher 3Drought and fire in the Amazon lead to sharp increases in forest tree mortality 2Drought and fire in the Amazon lead to sharp increases in forest tree mortality 3In sex-reversed cave insects, females have the penises 2
... Solution Enables Schools to Help Meet Federal Meal Reimbursement ... ... Pa., Oct. 20 ,BIO-key International, Inc. (OTC Bulletin Board: BKYI), a ... leader in providing biometric finger scanning ID,for schools, announced today a ...
... form of mercury found in the blood of marine ... seals than has previously been thought. Research published in ... shows that MeHg harms T-lymphocytes, key cells in a ... human lymphocytes. Mercury exposure is known to occur ...
... The Earth is in the midst of the sixth ... percent of all species disappearing, scientists say. Because of ... day and night to determine which species must be saved. ... published this week in the Proceedings of the National ...
Cached Biology News:identiMetrics & BIO-key(R) Provide Biometric Finger Scanning for School Food Service Nationwide 2identiMetrics & BIO-key(R) Provide Biometric Finger Scanning for School Food Service Nationwide 3identiMetrics & BIO-key(R) Provide Biometric Finger Scanning for School Food Service Nationwide 4Current mass extinction spurs major study of which plants to save 2Current mass extinction spurs major study of which plants to save 3
(Date:1/15/2014)... CA (PRWEB) January 15, 2014 ... research solutions, today announced that Lupin Limited, one of ... Freeslate’s CM Protégé PharmD System for high ... Mumbai, India, is focused on a wide range of ...
(Date:1/14/2014)... Histogen, Inc., a regenerative medicine company developing ... simulated embryonic conditions, today announced that they have entered ... for physician-dispensed aesthetic products containing Histogen’s proprietary multipotent cell ... an amendment to the existing license between Histogen and ...
(Date:1/14/2014)... and BETHESDA, Md. , Jan. ... together with two institutes from the National Institutes of ... for bringing safer, more effective treatments to patients on ... Center for Advancing Translational Sciences (NCATS) and the National ...
(Date:1/14/2014)... ®, provider of RapidResponse ®, a cloud-based supply chain ... S&OP ) service, is proud to be a gold sponsor ... at the Hilton San Diego Bayfront, January 30 – 31, ... , Director of Supply Chain at Amgen, as she presents ...
Breaking Biology Technology:Lupin 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 3Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
... FREMONT, Calif., Dec. 14 Vermillion, Inc. (Pink Sheets: ... Wallen, Ph.D. Chief Scientific Officer, Senior Vice President, Research ... board of directors upon confirmation of Vermillion,s bankruptcy plan. ... and development experience in diagnostics and biotechnology," said Gail ...
... , , , NATICK, Mass., Dec. ... announced the completion of a public offering of $2 billion aggregate ... statement. The public offering consists of $850 million of 4.50 ... due January 2020 and $300 million of 7.375 percent notes due ...
... ... the delivery of Brookfield Engineering’s Powder Flow Tester – helping Brookfield move from sheet ... , ... December 14, 2009 -- ThermoFab, a US-based thermoforming company, has completed the delivery of ...
Cached Biology Technology:Vermillion Announces Appointment of William C. Wallen, Ph.D. to Board of Directors 2Vermillion Announces Appointment of William C. Wallen, Ph.D. to Board of Directors 3Vermillion Announces Appointment of William C. Wallen, Ph.D. to Board of Directors 4Boston Scientific Announces Completion of $2 Billion Senior Notes Offering 2Boston Scientific Announces Completion of $2 Billion Senior Notes Offering 3Thermofab Helps Brookfield Engineering Move To A Compact Custom Plastic Enclosure 2
Black 96 Well Plate EB, RE Bottom...
96 Well Plate EB, RE bottom; high binding irradiated surface to provide increased binding affinity for hydrophilic proteins and complexes. Guaranteed coefficient of variation (CVs)....
...
Immulon 1 B 1x12 Strip, flat bottom; consistent medium binding affinity for hydrophobic complexes and proteins....
Biology Products: