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:5/25/2015)... 2015 Tunstall Americas announces major investment ... level of service to its Medical Answering Service customers. ... restructuring of resources, Tunstall now provides a seamless transition ... Answering Service to ensure superior patient satisfaction. ... invested over $10 million in expanded facilities and the ...
(Date:5/24/2015)... Orion, Clarkston, Metamora, Michigan (PRWEB) May 24, 2015 ... many patients for concerns about hair loss. Although it ... is clear that there are environmental factors such as ... that can contribute. Since they offer a comprehensive approach ... the peri and post-menopausal woman, they can help patients ...
(Date:5/24/2015)... York, New York (PRWEB) May 24, 2015 ... testosterone treatment lawsuits ( http://www.testosteronelawsuithub.com/ ) has scheduled ... the progress of the multidistrict litigation. According to ... Northern District of Illinois, the Conference will be ... (In re: Testosterone Replacement Therapy Product Liability Litigation ...
(Date:5/24/2015)... May 24, 2015 A report ... that the single best option for avoiding cardiovascular disease ... fitness level was the single most powerful predictor of ... such as diabetes and family history of premature death ... lifelong heart and lung fitness. , The Importance of ...
(Date:5/23/2015)... 23, 2015 On Wednesday, May 20, ... company has been the target of a sophisticated cyberattack,” ... the company’s ongoing Information Technology (IT) security efforts in ... , The most notable attack on health insurers was ... the nation’s second largest health insurer, revealed that they ...
Breaking Medicine News(10 mins):Health News:Tunstall Introduces New Medical Answering Service for the 21st Century Practice 2Health News:Women's Excellence Now Treats Menopausal Hair Loss 2Health News:Testosterone Lawsuit Attorneys at Bernstein Liebhard LLP Look Ahead to June Conference in Federal Multidistrict Litigation 2Health News:Testosterone Lawsuit Attorneys at Bernstein Liebhard LLP Look Ahead to June Conference in Federal Multidistrict Litigation 3Health News:Recent Mayo Clinic Studies Help to Highlight the Value of Cardio Testing 2Health News:Recent Mayo Clinic Studies Help to Highlight the Value of Cardio Testing 3Health News:One Headline Making Cyber Attack Sparks Discovery of Another 2Health News:One Headline Making Cyber Attack Sparks Discovery of Another 3Health News:One Headline Making Cyber Attack Sparks Discovery of Another 4
... It,s known that people who live or work in rural ... injuries compared to those in more urban environments. But while ... rates, new research suggests that limited access to early, high-quality ... factor. Researchers from St. Michael,s in Toronto looked at ...
... study by doctors at Mount Sinai Hospital in New ... an offshoot of medical tourism, which focuses solely on ... the practice of transplant tourism where patients travel to ... their transplantation. These transplant tourists may be subject ...
... ... ... National Heart Month, and Oldways and the Mediterranean Foods Alliance offer ... the Mediterranean region. Thousands of scientific studies (and the American Heart Association!) declare the Mediterranean ...
... chance of pregnancy by up to 50%, researchers say, , ... to a common chemical that,s used as a flame retardant ... , The chemicals, called PBDEs (polybrominated diphenyl ethers), are found ... carpets, plastics and other common household items and have been ...
... chemo-surgery regimen, researchers say , TUESDAY, Jan. 26 ... promise against locally advanced rectal cancer. , The ... rectal cancer, meaning they have a high likelihood ... receiving standard chemotherapy and optimum surgery. , For ...
... ... Interaction Associates details three essential actions for leaders to move an organization from conflict ... when not handled successfully. To download the white paper, go here: http://bit.ly/8ZcCNt ... Cambridge, ...
Cached Medicine News:Health News:More than 50 percent of injury-related deaths in rural Ontario occur before patients reach hospital 2Health News:More than 50 percent of injury-related deaths in rural Ontario occur before patients reach hospital 3Health News:Transplant tourism poses ethical dilemma for US doctors 2Health News:Transplant tourism poses ethical dilemma for US doctors 3Health News:10 Healthy Med Ways to Show Your Heart Some Love 2Health News:10 Healthy Med Ways to Show Your Heart Some Love 3Health News:Flame-Retardant Chemical Linked to Conception Problems 2Health News:Flame-Retardant Chemical Linked to Conception Problems 3Health News:Intensive Rectal Cancer Treatment Shows Promise 2Health News:From Conflict to Consensus: Interaction Associates Outlines How Leaders Can Achieve Successful Alignment and Implementation 2Health News:From Conflict to Consensus: Interaction Associates Outlines How Leaders Can Achieve Successful Alignment and Implementation 3
(Date:5/22/2015)... 2015 Today, Rhodes Pharmaceuticals L.P. announced that ... indicated for the treatment of Attention-Deficit/Hyperactivity Disorder (ADHD) ... The announcement comes just one ... U.S. Food and Drug Administration (FDA). ... methylphenidate capsule with an onset of effect of ...
(Date:5/21/2015)... , May 21, 2015 ... has announced the addition of the ... (Ankle Replacement, Digit Replacement, Elbow Replacement, Hip ... to 2019" report to their offering. ... knee replacement was valued at $4,470.9 million ...
(Date:5/21/2015)... , May 21, 2015  CryoLife, Inc. (NYSE: ... processing company focused on cardiac and vascular surgery, announced ... quarterly cash dividend for the second quarter 2015 of ... cash dividend of $0.03 per share will be paid ... record as of June 12, 2015.  The ex-dividend date ...
Breaking Medicine Technology:Rhodes Pharmaceuticals Announces Launch of New, Once-Daily Treatment for ADHD 2Rhodes Pharmaceuticals Announces Launch of New, Once-Daily Treatment for ADHD 3Rhodes Pharmaceuticals Announces Launch of New, Once-Daily Treatment for ADHD 4Rhodes Pharmaceuticals Announces Launch of New, Once-Daily Treatment for ADHD 5Rhodes Pharmaceuticals Announces Launch of New, Once-Daily Treatment for ADHD 6North American Joint Reconstruction Market 2015-2019 - Zimmer Holdings, DePuy Synthes Companies, Stryker, Biomet & Smith & Nephew Dominates the $4.4 Billion Market 2CryoLife Announces Quarterly Cash Dividend for the Second Quarter 2015 2
... AMSTERDAM, December 2 Amsterdam Molecular,Therapeutics ... gene therapy,announced today a number of management changes. Piers ... December 1, 2009. Hans,Preusting, PhD (age 47), Director Process ... and Project Management, also,effective December 1. These changes reflect ...
... BEACH, Calif., Dec. 1 Reproductive Partners Medical Group, ... Program to provide a financial incentive for patients with ... to consider reducing the chance of twins by transferring ... reproductive technology today is reducing the number of multiple ...
Cached Medicine Technology:AMT Announces Management Changes in Light of Refocused Strategy 2AMT Announces Management Changes in Light of Refocused Strategy 3Reproductive Partners Announces Elective Single Embryo Transfer (eSET) Encouragement Program 2
... national reference laboratory and a worldwide leader ... offers an extensive test menu of highly ... and anatomic pathology. Owned by the University ... than half of the nation's university teaching ...
... Laboratories is a national reference laboratory and ... and development. ARUP offers an extensive test ... tests in clinical and anatomic pathology. Owned ... clients include more than half of the ...
... ARUP Laboratories is a national reference laboratory ... research and development. ARUP offers an extensive ... medical tests in clinical and anatomic pathology. ... Laboratories' clients include more than half of ...
... ARUP Laboratories is a national reference ... laboratory research and development. ARUP offers an ... unique medical tests in clinical and anatomic ... ARUP Laboratories' clients include more than half ...
Medicine Products: