Chemically Engineered Au-Ag Plasmonic Nanostructures to Realize Large Area and Flexible Metamaterials

Soo Jung Kim; Mingi Seong; Hye Won Yun; Junhyuk Ahn; Heon Lee; Soong Ju Oh; Sung Hoon Hong

doi:10.1021/acsami.8b07454

Chemically Engineered Au-Ag Plasmonic Nanostructures to Realize Large Area and Flexible Metamaterials

Soo Jung Kim, Mingi Seong, Hye Won Yun, Junhyuk Ahn, Heon Lee, Soong Ju Oh, Sung Hoon Hong

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We developed a simple and systematic method to fabricate optically tunable and thermally and chemically stable Au-Ag nanocrystal-based plasmonic metamaterials. An Ag nanocrystal-based metamaterial with desirable optical properties was fabricated via nanoimprinting and ligand-exchange process. Its optical properties were controlled by selectively substituting Ag atoms with Au atoms through a spontaneous galvanic replacement reaction. The developed Au-Ag-based metamaterials provide excellent tunable plasmonic properties required for various applications in the visible and near-infrared regions by controlling the Au-Ag composition according to the conditions of the galvanic displacement. Furthermore, their thermal and chemical stabilities significantly improved because of the protective Au thin layer on the surface. Using this developed process, chemically and thermally stable and flexible plasmonic metamaterials were successfully fabricated on a flexible polyester terephthalate substrate.

Original language	English
Pages (from-to)	25652-25659
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	10
Issue number	30
DOIs	https://doi.org/10.1021/acsami.8b07454
Publication status	Published - 2018 Aug 1

Bibliographical note

Funding Information:
This work was financially supported by the Pioneer Research Center Program through the National Research Foundation of Korea (NRF-2014M3A6B3063702), Electronics and Telecommunications Research Institute (ETRI) grant funded through the Korean government (18ZB1100, Development of Basic Technologies for 3D Photo-Electronics), and by Global Ph. D. Fellowship (NRF-2016H1A2A1909313).

Publisher Copyright:
Copyright © 2018 American Chemical Society.

Keywords

galvanic replacement
ligand exchange
metamaterials
nanoimprint lithography
plasmonics
silver nanocrystal

ASJC Scopus subject areas

General Materials Science

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10.1021/acsami.8b07454

Cite this

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abstract = "We developed a simple and systematic method to fabricate optically tunable and thermally and chemically stable Au-Ag nanocrystal-based plasmonic metamaterials. An Ag nanocrystal-based metamaterial with desirable optical properties was fabricated via nanoimprinting and ligand-exchange process. Its optical properties were controlled by selectively substituting Ag atoms with Au atoms through a spontaneous galvanic replacement reaction. The developed Au-Ag-based metamaterials provide excellent tunable plasmonic properties required for various applications in the visible and near-infrared regions by controlling the Au-Ag composition according to the conditions of the galvanic displacement. Furthermore, their thermal and chemical stabilities significantly improved because of the protective Au thin layer on the surface. Using this developed process, chemically and thermally stable and flexible plasmonic metamaterials were successfully fabricated on a flexible polyester terephthalate substrate.",

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AU - Lee, Heon

AU - Oh, Soong Ju

AU - Hong, Sung Hoon

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Chemically Engineered Au-Ag Plasmonic Nanostructures to Realize Large Area and Flexible Metamaterials

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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