Enlarged quantum dots could yield light source for biomedical imaging

Researchers at the University of Texas at Dallas (UT Dallas) and colleagues altered nanocrystal quantum dots by increasing their size to avoid their unpredictable blinking, making them a promising light source for illuminating the human body in biomedical imaging.

The team—led by Dr. Anton Malko, assistant professor at UT Dallas—increased the quantum dots from their 4 nm normal size to 15 nm, discovering that the process that causes their blinking didn't have the same effect when they scaled up the size, says Malko. They found that said process, known as “Auger” recombination, is strongly dependent on the thickness of the quantum dot’s shell and allows complete blinking suppression for large shell particles, he adds.

Quantum dots are regarded as the next generation of efficient light sources because of their efficiency in both emitting and absorbing light, says Malko. So keeping them from blinking is key to facilitating their widespread use, he says.

The study is the result of collaboration between Malko’s team at UT Dallas and researchers from the Center for Integrated Nanotechnologies and the Center for Advanced Solar Photophysics at Los Alamos National Laboratory (Los Alamos, TX).

The team's findings are detailed in a recent issue of the journal Nano Letters. For more information on the work, please visit http://pubs.acs.org/doi/abs/10.1021/nl2025272?prevSearch=malko&searchHistoryKey=.

Get All the BioOptics World News Delivered to Your Inbox

Subscribe to BioOptics World Magazine or email newsletter today at no cost and receive the latest news and information.

 Subscribe Now
Related Articles

OCT imaging improves percutaneous coronary intervention, study finds

OCT can visualize coronary arteries in patients undergoing percutaneous coronary intervention, leading to improved outcomes.

New bioimaging technique offers clear view of nervous system

Scientists at Ludwig-Maximilians University have developed a technique for turning the body of a deceased rodent entirely transparent, revealing the central nervous system in unprecedented clarity....

Fluorescent jellyfish proteins light up unconventional laser

Safer lasers to map your cells could soon be in the offing -- all thanks to the humble jellyfish. Conventional lasers, like the pointer you might use to entertain your cat, produce light by emittin...

Microscope detects one million-plus biomarkers for sepsis in 30 minutes

A microscope has the potential to simultaneously detect more than one million biomarkers for sepsis at the point of care.


Neuro15 exhibitors meet exacting demands: Part 2

Increasingly, neuroscientists are working with researchers in disciplines such as chemistry and p...

Why be free?

A successful career contributed to keeping OpticalRayTracer—an optical design software program—fr...

LASER Munich 2015 is bio-bent

LASER World of Photonics 2015 included the European Conferences on Biomedical Optics among its si...

White Papers

Understanding Optical Filters

Optical filters can be used to attenuate or enhance an image, transmit or reflect specific wavele...

How can I find the right digital camera for my microscopy application?

Nowadays, image processing is found in a wide range of optical microscopy applications. Examples ...



Twitter- BioOptics World

Copyright © 2007-2016. PennWell Corporation, Tulsa, OK. All Rights Reserved.PRIVACY POLICY | TERMS AND CONDITIONS