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Gold nanoparticles boost QD glow

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Ashley N. Rice, [email protected]

A DNA template that controls the distance between gold nanoparticles and quantum dots can predictably increase or decrease the intensity of a quantum dot’s fluorescence. The breakthrough could lead to the use of quantum dots as a component in better chemical sensors, photodetectors and nanoscale lasers. Those who have tried to tune a radio know that moving their hands toward or away from the antenna can improve or ruin the reception, but that controlling this strange effect is difficult. Similarly, nanotechnology researchers have been frustrated trying to control the light emitted...Read full article

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    Published: April 2013
    Glossary
    metrology
    Metrology is the science and practice of measurement. It encompasses the theoretical and practical aspects of measurement, including the development of measurement standards, techniques, and instruments, as well as the application of measurement principles in various fields. The primary objectives of metrology are to ensure accuracy, reliability, and consistency in measurements and to establish traceability to recognized standards. Metrology plays a crucial role in science, industry,...
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    quantum dots
    A quantum dot is a nanoscale semiconductor structure, typically composed of materials like cadmium selenide or indium arsenide, that exhibits unique quantum mechanical properties. These properties arise from the confinement of electrons within the dot, leading to discrete energy levels, or "quantization" of energy, similar to the behavior of individual atoms or molecules. Quantum dots have a size on the order of a few nanometers and can emit or absorb photons (light) with precise wavelengths,...
    Alex LiddleAmericasDNA templatefluorescence lifetimegold nanoparticlesImagingMarylandmetrologynanonanolasersnanoparticlesNISTqdsquantum dotsResearch & TechnologySensors & DetectorsTech PulseLasers

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