Navigation Links
DNA and quantum dots: All that glitters is not gold
Date:1/25/2013

ecause these small movements can be easily detected by tracking the changes in the quantum dot's brightness, they can be used to reveal, for example, the presence of a particular chemical that is selectively attached to the DNA rectangle. However, getting it to work properly is complicated, says NIST's Alex Liddle.

"A quantum dot is highly sensitive to the distance between it and the gold, as well as the size, number and arrangement of the gold particles," says Liddle, a scientist with the NIST Center for Nanoscale Science and Technology. "These factors can boost its fluorescence, mask it or change how long its glow lasts. We wanted a way to measure these effects, which had never been done before."

Liddle and his colleagues made several groups of DNA rectangles, each with a different configuration of quantum dots and gold particles in a solution. Using a laser as a spotlight, the team was able to follow the movement of individual DNA rectangles in the liquid, and also could detect changes in the fluorescent lifetime of the quantum dots when they were close to gold particles of different sizes. They also showed that they could exactly predict the lifetime of the fluorescence of the quantum dot depending on the size of the nearby gold nanoparticles.

While their tracking technique was time consuming, Liddle says that the strength of their results will enable them to engineer the dots to have a specific desired lifetime. Moreover, the success of their tracking method could lead to better measurement methods.

"Our main goals for the future," he concludes, "are to build better nanoscale sensors using this approach and to develop the metrology necessary to measure their performance."


'/>"/>

Contact: Chad Boutin
boutin@nist.gov
301-975-4261
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Page: 1 2

Related medicine news :

1. A quantum leap in gene therapy of Duchenne muscular dystrophy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
DNA and quantum dots: All that glitters is not gold
(Date:12/26/2014)... 2014 Parker & Sons, Inc. ... in heating, cooling and plumbing contractor services throughout ... services in 2014 with regard to air-conditioning systems. ... is known for its incredibly hot summers. Working ... intricacies and details of a wide variety of ...
(Date:12/25/2014)... 2014 The click strand ... strength and durability. Today, the business announces a ... valid until Jan. 30, 2015. , Click strand ... hardwood. BambooFlooringChina.com is a well-known brand in the ... to find a reliable bamboo flooring supplier. , ...
(Date:12/25/2014)... 2014 Product liability lawsuits filed in ... ( http://www.consumerinjurylawyers.com/DePuy/ ) continue to move forward in federal ... issued in the U.S. District Court, Northern District of ... open conference on January 7, 2015, at the Paul ... West Palm Beach, Florida. The Conference is scheduled to ...
(Date:12/25/2014)... Recently, Dylan Queen, a famous online company supplying ... of discounted prom dresses, most of which are priced ... the company, the promotion is valid until Jan. 22, ... the UK market. , The prom dresses in this ... styles: A-line strapless, empire strapless chiffon, one shoulder, floor-length, ...
(Date:12/25/2014)... sells many bamboo products and the business is famous ... announces big discounts on its bamboo mats , which ... the world’s leader in bamboo flooring. According to the ... 2015. , The bamboo mats are made from well-treated ... the bamboo strips for the mats are boiled and ...
Breaking Medicine News(10 mins):Health News:Parker & Sons Announces Record Demand For 24 Hour Emergency Services In 2014 With Regard To Air-Conditioning Systems 2Health News:Parker & Sons Announces Record Demand For 24 Hour Emergency Services In 2014 With Regard To Air-Conditioning Systems 3Health News:BambooFlooringChina.com: click strand woven bamboo flooring promotion valid until Jan. 30, 2015. 2Health News:Federal Court Overseeing DePuy ASR Hip Lawsuit Set to Convene Conference in January, Bernstein Liebhard LLP Reports 2Health News:Federal Court Overseeing DePuy ASR Hip Lawsuit Set to Convene Conference in January, Bernstein Liebhard LLP Reports 3Health News:Dylan Queen: Cheap Prom Dresses for the UK Market 2Health News:Various Styles of Bamboo Mats in Many Colors from BambooFlooringChina.com 2
... Analytical, based in Ames, IA will reveal the latest results ... system. This instrument rapidly identifies microorganisms in less ... The generated fingerprint when compared to a database of ... strain typing and tracking.Because of its ease of use and ...
... 2009, the United States District Court for the Southern ... previously disclosed antitrust lawsuit filed by Pioneer Valley Casket ... casket retailers against Batesville Casket Company, Inc., a wholly ... )The Pioneer Valley plaintiffs agreed to dismiss their complaint ...
... Inc. (NYSE: DVA ) announced that the United ... has informed the company that it has completed its investigation ... was first issued a formal subpoena in October 2004 and ... against the company, no fines were assessed and no mandatory ...
... A new survey from Noblis Health Innovation, a ... context of the current economic crisis, nearly a third of hospitals ... Conducted in April 2009, the affiliation study is the first in ... Noblis Insights Panel , a collection of more than 150 leading ...
... make that dream so real, goes a popular song. Now ... to perform an essential form of DNA repair. , Prof. ... been studying DNA repair for some two decades: ,Considering that ... a day by radiation, pollutants and harmful chemicals produced within ...
... Cancer Screenings And Education about Skin Cancer PreventionSKILLMAN, N.J., ... Johnson Consumer Companies, Inc., announces its second year of ... Skin" tour. The free skin cancer screening tour ... New York City,s Grand Central Terminal, and will visit ...
Cached Medicine News:Health News:Advanced Analytical Reveals New Platform for Rapid Genotypic Identification of Microorganisms at ASM 2009 2Health News:Federal District Judge Dismisses Antitrust Lawsuit Against Batesville Casket Company 2Health News:Noblis Insights Panel Finds Growing Interest in Hospital Affiliation as a Strategic Response to Challenging Market Conditions 2Health News:Noblis Insights Panel Finds Growing Interest in Hospital Affiliation as a Strategic Response to Challenging Market Conditions 3Health News:Stopgap DNA repair needs a second step 2Health News:AVEENO(R) Announces Kick-Off of The Skin Cancer Foundation's 2nd Annual 'Road to Healthy Skin' Tour Presented by AVEENO(R) and Rite Aid 2Health News:AVEENO(R) Announces Kick-Off of The Skin Cancer Foundation's 2nd Annual 'Road to Healthy Skin' Tour Presented by AVEENO(R) and Rite Aid 3Health News:AVEENO(R) Announces Kick-Off of The Skin Cancer Foundation's 2nd Annual 'Road to Healthy Skin' Tour Presented by AVEENO(R) and Rite Aid 4
(Date:12/24/2014)... , Dec. 23, 2014 Echo Therapeutics, ... device company focused on skin permeation, continuous glucose ... Scott W. Hollander has been appointed Chief ... has more than 20 years of experience in ... and most recently served as Vice President, Business ...
(Date:12/24/2014)... 2014   Synageva BioPharma Corp. (NASDAQ: ... therapeutic products for rare disorders, today announced validation ... Marketing Authorization Application (MAA) for sebelipase alfa for ... request for accelerated assessment, which has the potential ... The MAA, and the Biologics License ...
(Date:12/24/2014)... , Dec. 23, 2014 Tianyin Pharmaceutical ... that specializes in patented biopharmaceutical, modernized traditional Chinese ... (API) today announced that the Company achieved the ... Manufacturing Practice (GMP) certificate of TPI,s Qionglai Facility ... (CFDA). The public notice period is a significant ...
Breaking Medicine Technology:Echo Therapeutics Announces Scott W. Hollander as President & Chief Executive Officer 2Echo Therapeutics Announces Scott W. Hollander as President & Chief Executive Officer 3Synageva BioPharma Announces Sebelipase Alfa Marketing Authorization Application Validated By The EMA 2Synageva BioPharma Announces Sebelipase Alfa Marketing Authorization Application Validated By The EMA 3TPI QLF Achieved Public Notice Status of GMP Certification 2TPI QLF Achieved Public Notice Status of GMP Certification 3
... May 25 Two late-breaking clinical trials presented ... clinical data supporting Abbott,s market-leading XIENCE V® Everolimus Eluting ... of more than 5,000 real-world, complex patients, XIENCE V ... at one year (0.84 percent per Academic Research Consortium ...
... 24 At a town hall meeting a year ago, President Obama ... by keeping older people out of more expensive institutional care.  "I actually think ... it helps keep people in their homes," the president told his audience in ... , , ...
Cached Medicine Technology:New Data Reinforces Safety Profile of Abbott's Market-Leading XIENCE V(R) Drug Eluting Stent 2New Data Reinforces Safety Profile of Abbott's Market-Leading XIENCE V(R) Drug Eluting Stent 3New Data Reinforces Safety Profile of Abbott's Market-Leading XIENCE V(R) Drug Eluting Stent 4New Data Reinforces Safety Profile of Abbott's Market-Leading XIENCE V(R) Drug Eluting Stent 5Medicare Policies Ignore Aging-at-Home Concept 2Medicare Policies Ignore Aging-at-Home Concept 3Medicare Policies Ignore Aging-at-Home Concept 4Medicare Policies Ignore Aging-at-Home Concept 5
CCR Medical conventional laryngoscope handles....
... Wire-Reinforced LMA ™ Airway., ,The ... tube which allows it to be ... while maintaining a good seal. This ... and dental surgery, or other procedures ...
... Airway. , ,Developed for cardiopulmonary resuscitation ... the LMA Fastrach™ has been designed to ... or neck. The LMA Fastrach™ allows continuous ... by emergency teams worldwide including NASA for ...
... in the production of airway ... an integrated solution to all ... single-use Portex Soft Seal Laryngeal ... to this wide portfolio of ...
Medicine Products: