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Defect-free Thin Films Realized

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ITHICA, NY, Jan. 22, 2010 – To make thin films for semiconductors in electronic devices, layers of atoms must be grown in neat, crystalline sheets. But while some materials grow smooth crystals, others tend to develop bumps and defects – a serious problem for thin-film manufacturing. Researchers at Cornell University have shed new light on how atoms arrange themselves into thin films. Led by assistant professor of physics, Itai Cohen, they recreated conditions of layer-by-layer crystalline growth using particles much bigger than atoms, but still small enough that they behave like atoms. "These particles are...Read full article

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    Published: January 2010
    Glossary
    brownian motion
    The behavior of microscopic solid particles suspended in a fluid, first observed by botanist Robert Brown in 1827 as a continuous random motion.
    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.
    optical tweezers
    Optical tweezers refer to a scientific instrument that uses the pressure of laser light to trap and manipulate microscopic objects, such as particles or biological cells, in three dimensions. This technique relies on the momentum transfer of photons from the laser beam to the trapped objects, creating a stable trapping potential. Optical tweezers are widely used in physics, biology, and nanotechnology for studying and manipulating tiny structures at the microscale and nanoscale levels. Key...
    AmericaBasic ScienceBrownian motionCornell Universitycrystal growthcrystalline sheetsindustrialItai CohenMark Buckleymicron-sized silicaMicroscopynanooptical microscopeoptical tweezersOpticsResearch & Technologysemiconductorsthin films

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