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Magnets Change Crystals' Tint

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RIVERSIDE, Calif., July 16, 2007 -- Nanotechnologists can change the color of tiny particles of iron oxide suspended in water by applying an external magnetic field to the solution. The discovery could lead to proved electronic displays and the manufacture of products such as erasable and rewritable electronic paper and ink that can change color electromagnetically. University of California, Riverside's Yongxing Hu (l-r), Jianping Ge and Yadong Yin of the Department of Chemistry. The team discovered they could change the color of photonic crystals in solution by applying an external magnetic field. (Photos courtesy Yin...Read full article

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    Published: July 2007
    Glossary
    color
    The attribute of visual experience that can be described as having quantitatively specifiable dimensions of hue, saturation, and brightness or lightness. The visual experience, not including aspects of extent (e.g., size, shape, texture, etc.) and duration (e.g., movement, flicker, etc.).
    light
    Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm. In photonic applications light can be considered to cover the nonvisible portion of the spectrum which includes the ultraviolet and the infrared.
    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.
    nanoparticle
    A small object that behaves as a whole unit or entity in terms of it's transport and it's properties, as opposed to an individual molecule which on it's own is not considered a nanoparticle.. Nanoparticles range between 100 and 2500 nanometers in diameter.
    optical
    Pertaining to optics and the phenomena of light.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    sensor
    1. A generic term for detector. 2. A complete optical/mechanical/electronic system that contains some form of radiation detector.
    Basic SciencecolorCommunicationsConsumerelectromagneticelectronic displayferromagneticfiber opticsiron oxidelightmagneticnanonanoparticleNews & Featuresopticaloptical semiconductorphotonic crystalphotonicsRiversidesemiconductorssensorSensors & DetectorssuperparamagnetictelecommunicationsYadong YinLasers

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