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학술지 Chemically Engineered Au-Ag Plasmonic Nanostructures to Realize Large Area and Flexible Metamaterials
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저자
김수정, 성민기, 윤혜원, 안준혁, 이헌, 오승주, 홍성훈
발행일
201808
출처
ACS Applied Materials & Interfaces, v.10 no.30, pp.25652-25659
ISSN
1944-8244
출판사
American Chemical Society(ACS)
DOI
https://dx.doi.org/10.1021/acsami.8b07454
협약과제
18JB1300, 가시광파장용 나노결정기반 3차원 저손실 메타소재 개발, 홍성훈
초록
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.
KSP 제안 키워드
Au-Ag, Exchange process, Flexible metamaterial, Galvanic displacement, Near-Infrared(NIR), Plasmonic nanostructures, Systematic method, Thermal and chemical stabilities, Thermally stable, Visible and near-infrared, large area