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:10/18/2014)... patients referred for evaluation of suspected genetic conditions, ... 25 percent, including detection of a number of ... disease, according to a study appearing in ... coincide with the American Society of Human Genetics ... or coding regions of thousands of genes simultaneously ...
(Date:10/17/2014)... is available in German . ... sperms every day in order to reproduce? And why are ... topic of the latest issue of the research journal ... evolutionary biologist Steven Ramm from Bielefeld University Bielefeld has compiled ... not unusual for a female to copulate with several males ...
(Date:10/16/2014)... war on the human body. Battles are won, ... pancreatic cancer, this stalemate—known as tumor dormancy—can last ... a phenomena that is poorly understood. , ... of Salvatore Torquato, a Professor of Chemistry at ... tumor dormancy and the switch to a malignant ...
Breaking Biology News(10 mins):Whole-exome sequencing shows potential as diagnostic tool 2Sperm wars 2Modeling tumor dormancy 2
... A new grant from the National Institute of Biomedical ... of Health (NIH), will provide funding for University of ... novel bioreactor system that will control mechano-electrochemical environment for ... properties of engineered tissues. The two-year, $735,000 grant will ...
... Il. A key statistic that consumer groups and ... national rankings can be misleading, researchers report in a new ... number above 1.0 indicates a hospital had more deaths than ... were fewer than the expected number of deaths. The ...
... Aquaculture, once a fledgling industry, now accounts for 50 percent ... by an international team of researchers. And while the industry ... significant strain on marine resources by consuming large amounts of ... authors conclude. Their findings are published in the Sept. 7 ...
Cached Biology News:University of Miami receives NIH grant to support novel technology for tissue engineering 2Treating bone loss in breast cancer survivors 2Half of the fish consumed globally is now raised on farms, study finds 2Half of the fish consumed globally is now raised on farms, study finds 3
(Date:10/25/2014)... According to new market research report "Data ... Enterprise, Telecom), by Design Types (Electrical, Mechanical), and ... 3, Tier 4) - Global Forecast to 2019", ... Center Construction Market into various segments with an ... report also identifies the factors driving this market, ...
(Date:10/25/2014)... SonaCare Medical, LLC, leader in ... announced that its Board of Directors has appointed ... President and member of the Board effective immediately. ... expanded responsibilities within the company, including further developing ... commercialization, manufacturing and finance. , Dr. Carol ...
(Date:10/25/2014)... -- RegeneRx Biopharmaceuticals, Inc. (OTCBB: RGRX) ("the Company" or "RegeneRx") ... Symposium on Thymosins in Health and Disease in ... thymosin beta 4 (TB4) linked with rhodamine (a fluorescent ... a rodent model of stroke, it was visualized outside ... functional tissue of the brain).   The leakage of TB4 ...
(Date:10/22/2014)... -- Research and Markets has announced ... Market (Product types, Application, Technology, End User and ... Demand, Insights, Analysis, Research, Report, Opportunities, Segmentation and ... offering. This new report titled, ... and Geography) Global Size, Industry Analysis, Trends, Opportunities, ...
Breaking Biology Technology:Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 2Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 3Data Center Construction Market Worth $22.73 Billion by 2019 - New Report by MarketsandMarkets 4SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 2SonaCare Medical Board of Directors Appoints Dr. Mark Carol as CEO and President 3Researchers Report Thymosin Beta 4 Crosses Blood-Brain Barrier In Animal Stroke Model 2Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 2Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 3
... and biochemistry at The University of Texas at Austin, ... with Professor William Moerner of Stanford University. , The ... Tamir, was given to the two scientists for their ... and imaging. , The $100,000 prize will be presented ...
... service revenue of $238.7 million grows 32% year-over-year, - Operating ... - Backlog increases 41% ... - Net quarterly book-to-burn ratio equates ... PRXL ) today announced its financial results for the,second quarter ended ...
... of Family Cord Blood Banks, LOS ANGELES, ... of California Cryobank, today announced that its co-founder ... appointed to the Department,of Health and Human Services, ... on Blood Stem Cell Transplantation,(ACBSCT). Through his appointment, ...
Cached Biology Technology:PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 2PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 3PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 4PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 5PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 6PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 7PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 8PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 9PAREXEL Reports Second Quarter Fiscal Year 2008 Financial Results 10Dr. Charles A. Sims of California Cryobank's Family Cord Blood Services Named to National Stem Cell Advisory Council 2Dr. Charles A. Sims of California Cryobank's Family Cord Blood Services Named to National Stem Cell Advisory Council 3
ANTI GELSOLIN...
...
... is intended for the derivation of ... in serum-free conditions. ... Clonal Grade Medium Basal Medium ... Trypsin Solution Gelatin Solution Complete Freezing ...
Template and primers for preparation of internal control spots...
Biology Products: