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New Nanomaterials Control, Direct Light Energy

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TORONTO, Canada, July 18, 2011 — Taking inspiration from the photosynthetic inner workings of plants, engineers have built nanoantennas that control and direct the energy absorbed from light. "Nanotechnologists have for many years been captivated by quantum dots — particles of semiconductor that can absorb and emit light efficiently, and at custom-chosen wavelengths," said Shana Kelley, a professor at Leslie Dan Faculty of Pharmacy, the Department of Biochemistry in the Faculty of Medicine, and the Department of Chemistry in the Faculty of Arts & Science at the University of Toronto. "What the community has...Read full article

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    Published: July 2011
    Glossary
    electromagnetic wave
    Wave of radiation identified by individual fluctuations of electric and magnetic fields.
    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.
    nanotechnology
    The use of atoms, molecules and molecular-scale structures to enhance existing technology and develop new materials and devices. The goal of this technology is to manipulate atomic and molecular particles to create devices that are thousands of times smaller and faster than those of the current microtechnologies.
    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,...
    Americasartifical atomsBasic ScienceBiophotonicsCalifornia NanoSystems InstituteCanadaEdward S. Rogers Sr. Department of Electrical & Computer Engineeringelectromagnetic waveFred Kavli Chair in NanoSystems Sciencesgreen photonicslight energyMaterialsnanonanoantennasnanomaterialsnanoparticlesnanotechnologypaul S. Weissphotosynthesisquantum dotsResearch & TechnologyTed SargentUCLAUniversity of California Los AngelesUniversity of TorontoUT

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