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Well‐Defined Multibranched Gold with Surface Plasmon Resonance in Near‐Infrared Region from Seeding Growth Approach Using Gyroid Block Copolymer Template
Author(s) -
Hsueh HanYu,
Chen HungYing,
Hung YuChueh,
Ling YiChun,
Gwo Shangjr,
Ho RongMing
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201204631
Subject(s) - materials science , gyroid , nanoporous , surface plasmon resonance , copolymer , polymer , nanotechnology , polystyrene , nanostructure , chemical engineering , composite material , nanoparticle , engineering
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.