C2017-07 – Robust Copper-Silica Core-Shell Nanoparticles

Technology # 17-07 Technology that replaces silver and gold with copper for nanoparticles. Plasmonic metal nanostructures have attracted considerable interests because of their superior ability to manipulate light at the nanoscale, which make them particularly useful for sensing, optical waveguiding, telecommunication, biomedicine, and plasmon-enhanced photocatalysis. Several metals, such as silver, gold, and copper, exhibit plasmonic resonances in the visible region. Compared to silver and gold, copper is much cheaper, making it attractive for practical applications. While much effort has been devoted to the nanostructures made of silver and gold, only limited success has been met with copper. Copper nanoparticles display an intense localized surface plasmon resonance (LSPR) peak with a narrow band-width comparable to that of silver and gold nanoparticles, however, copper oxidizes readily in air, and the oxidation interferes with the plasmon properties, and thus degrades its usefulness. Technology Ventures ventures@uark.edu 479-575-7243

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