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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Au-ag core-shell nanoparticle array by block copolymer lithography for synergistic broadband plasmonic properties

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Title
Au-ag core-shell nanoparticle array by block copolymer lithography for synergistic broadband plasmonic properties
Author(s)
Seung Keun Cha; Mun J.H.; Chang T.; Sang Yun Kim; Ju Young Kim; Hyeong Min Jin; Jeong Yong Lee; Shin J.; Kim K.H.; Kim S.O.
Publication Date
2015-05
Journal
ACS NANO, v.9, no.5, pp.5536 - 5543
Publisher
AMER CHEMICAL SOC
Abstract
Localized surface plasmon resonance of metallic nanostructures receives noticeable attention in photonics, electronics, catalysis, and so on. Core-shell nanostructures are particularly attractive due to the versatile tunability of plasmonic properties along with the independent control of core size, shell thickness, and corresponding chemical composition, but they commonly suffer from difficult synthetic procedures. We present a reliable and controllable route to a highly ordered uniform Au@Ag core-shell nanoparticle array via block copolymer lithography and subsequent seeded-shell growth. Size-tunable monodisperse Au nanodot arrays are generated by block copolymer self-assembly and are used as seed layers to grow Ag shells with variable thickness. The resultant Au@Ag core-shell nanoparticle arrays exhibit widely tunable broadband enhancement of plasmonic resonance, greatly surpassing single-element nanoparticle or homogeneous alloy nanoparticle arrays. Surface-enhanced Raman scattering of the core-shell nanoparticle arrays showed an enhancement factor greater than 270 from Au nanoparticle arrays. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/1764
ISSN
1936-0851
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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2015_ACS Nano_Au-Ag core-shell nanoparticle array by block copolymer lithography for synergistic broadband plasmonic properties.pdfDownload

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