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Material Could Provide Self-Cleaning, Waterproof Optics

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PHILADELPHIA, Oct. 17, 2012 — Inspired by butterfly wings, a new material that repels water and shines with beautiful, brilliant hues could provide the foundation for optical devices that are self-cleaning and waterproof. “A lot of research over the last ten years has gone into trying to create structural colors like those found in nature, in things like butterfly wings and opals,” said associate professor Shu Yang of the University of Pennsylvania. “People have also been interested in creating superhydrophobic [super water-repellant] surfaces which is found in things like lotus leaves, and in...Read full article

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    Published: October 2012
    Glossary
    iridescence
    The rainbow exhibition of colors, usually caused by interference of light of different wavelengths reflected from superficial layers in the surface of a material.
    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...
    photoresist
    Photoresist is a light-sensitive material used in photolithography processes, particularly in the fabrication of semiconductor devices, integrated circuits, and microelectromechanical systems (MEMS). It is a crucial component in the patterning of semiconductor wafers during the manufacturing process. The primary function of photoresist is to undergo a chemical or physical change when exposed to light, making it selectively soluble or insoluble in a subsequent development step. The general...
    polymer
    Polymers are large molecules composed of repeating structural units called monomers. These monomers are chemically bonded together to form long chains or networks, creating a macromolecular structure. The process of linking monomers together is known as polymerization. Polymers can be classified into several categories based on their structure, properties, and mode of synthesis. Some common types of polymers include: Synthetic polymers: These are human-made polymers produced through...
    structural color
    Structural color refers to coloration in materials that is not caused by pigments or dyes but is instead a result of the physical structure of the material. In structural color, the interaction of light with the microscopic or nanoscopic structure of the material produces color through interference, diffraction, or other optical effects. This is in contrast to pigments, which achieve color by selectively absorbing certain wavelengths of light. Key characteristics of structural color...
    3-D latticeWafersAmericasbuilding skinsbutterfly wingsCoatingsenergyholographic lithographyindustrialiridescenceLaserslasinglight guidinglight-based analogsMaterials & Chemicalsnanoscale roughnessoptical devicesOpticsPennsylvaniaperiodic patternsphotonicsphotoresistpolymerResearch & TechnologysemiconductorssensingSensors & DetectorsShu Yangsolventsstructural colorsuperhydrophobicitysurface roughnessUniversity of Pennsylvaniawater repellant

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