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KMID : 1059520130570050618
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Journal of the Korean Chemical Society
2013 Volume.57 No. 5 p.618 ~ p.624
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Controll over the Au@Ag Core-shell Nanoparticle 2D Patterns via Diblock Copolymer Inverse Micelle Templates and Investigation of the Surface Plasmon Based Optical Property
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Yoon Min-Ji
Kim Ji-Hyeon
Jang Yoon-Hee
Lee Ji-Eun
Chung Kyung-Wha
Quan Li-Na
Kim Dong-Ha
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Abstract
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We demonstrated unique inter- and intra-plasmonic coupling effects in bimetallic Au@Ag core-shell NP arrays which are regularly or randomly arranged on self-assembled block copolymer (BCP) inverse micelle monolayers. Polyvinylpyrrolidone (PVP)-stabilized Au@Ag core-shell NP arrays in regular or disordered configuration were incorporated and assembled on reconstructed PS-b-P4VP inverse micelle templates through two types of processes. The intensively enhanced LSPR coupling properties of individual and assembled Au@Ag NPs were evaluated by UV-visible spectroscopy in terms of the type of ligand stabilizer, coupling between Au and Ag, thickness of Ag shell, and type of array configuration. Finally, Au@Ag core-shell NP arrays were employed as active substrates for surface enhanced Raman spectroscopy (SERS) and a significantly enhanced signal enhancement was observed in accordance with the coupling intensity of Au@Ag NPs patterns.
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KEYWORD
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Au@Ag nanoparticle, Self-assembly, Block copolymer, Surface plasmon, Surface-enhanced Raman scattering
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