Well-defined multibranched gold with surface plasmon resonance in near-infrared region from seeding growth approach using gyroid block copolymer template.
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.
Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
Han-Yu
HY
Hsueh
Hung-Ying
HY
Chen
Yu-Chueh
YC
Hung
Yi-Chun
YC
Ling
Shangjr
S
Gwo
Rong-Ming
RM
Ho
D006046:Gold / Q000737:chemistry*; D007259:Infrared Rays; D053768:Metal Nanoparticles / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D016062:Porosity; D020349:Surface Plasmon Resonance
D006046:Gold