Advanced Materials

Well-Defined Multibranched Gold with Surface Plasmon Resonance in Near-Infrared Region from Seeding Growth Approach Using Gyroid Block Copolymer Template

Authors

  • Han-Yu Hsueh,

    1. Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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  • Hung-Ying Chen,

    1. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
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  • Yu-Chueh Hung,

    1. Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan
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  • Yi-Chun Ling,

    1. Institute of Photonics Technologies, National Tsing Hua University, Hsinchu 30013, Taiwan
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  • Shangjr Gwo,

    1. Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan
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  • Rong-Ming Ho

    Corresponding author
    1. Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Frontier Research Center on Fundamental and Applied Sciences of Matters; Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
    • Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, Frontier Research Center on Fundamental and Applied Sciences of Matters; Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
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Abstract

Well-defined multibranched gold (Au) in polymers, both as bulk or continuous thin films, can be fabricated by using a nanoporous polymer with gyroid nanochannels as a template. The nanoporous polymer template is obtained from the self-assembly of a degradable block copolymer, polystyrene-b-poly (L-lactide) (PS-PLLA), followed by the hydrolysis of PLLA blocks. Templated seeding growth approach can be conducted to create precisely controlled nanostructured Au giving remarkable surface plasmon resonance (SPR) in (branched Au with uniform distribution in PS matrix) near-infrared (NIR) region. Controlled growth conditions allow the fabrication of three-dimensionally ordered nanoporous Au particles that possess NIR SPR. Double gyroid Au with dual networks in the PS matrix is obtained after completing the seeding growth at which the NIR SPR diminishes resulting from the reduction in the density of nanostructured edge.

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