Home > News > Reduced quantum dot toxicity through 'jelly dots'
July 12th, 2007
Reduced quantum dot toxicity through 'jelly dots'
A quantum dot (QD), also called a nanocrystal, is a semiconductor nanostructure that can be as small as 2 to 10 nm. The usefulness of quantum dots comes from their peak emission frequency's extreme sensitivity - quantum mechanical in nature - to both the dot's size and composition. QDs have been touted as possible replacements for organic dyes in the imaging of biological systems, due to their excellent fluorescent properties, good chemical stability, broad excitation ranges and high photobleaching thresholds. However, the main drawback of QDs is their toxicity and therefore their application is problematic. If this toxicity problem could be addressed, QDs may one day be safely utilized in many areas. For instance, cadmium telluride (CdTe - which is toxic) QD based nanocomposites can be used as fluorescent probes for biological imaging, they can also be utilized to monitor targeted drug delivery and for controlled modification of structural and functional properties of intracellular components. Scientists in Ireland have been using gelatin during the production of CdTe QDs thereby reducing the toxicity of the particles. Their approach could be useful for the development of other nanoparticle composites with low toxicity as well.
Newly-Developed Nanobiosensor Quickly Diagnoses Cancer August 20th, 2014
Ultrasonic Waves Applied in Production of Graphene Nanosheets August 20th, 2014
The channel that relaxes DNA: Relaxing DNA strands by using nano-channels: Instructions for use August 20th, 2014
Сalculations with Nanoscale Smart Particles August 19th, 2014
Analytical solutions from Malvern Instruments support University of Wisconsin-Milwaukee researchers in understanding environmental effects of nanomaterials July 30th, 2014
NNCO Announces an Interactive Webinar: Progress Review on the Coordinated Implementation of the National Nanotechnology Initiative 2011 Environmental, Health, and Safety Research Strategy July 23rd, 2014
Development of an interactive tool for the implementation of environmental legislation for nanoparticles manufacturers July 4th, 2014
FDA issues guidance on use of nanotechnology in foods July 1st, 2014
Interaction between Drug, DNA for Designing Anticancer Drugs Studied in Iran August 17th, 2014
NANOPARTICLES INDIA August 8th, 2014
Researchers create quantum dots with single-atom precision June 30th, 2014
New Los Alamos Approach May Be Key to Quantum Dot Solar Cells With Real Gains in Efficiency: Nanoengineering Boosts Carrier Multiplication in Quantum Dots June 19th, 2014