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Viable stretchable plasmonics based on unidirectional nanoprisms

Title
Viable stretchable plasmonics based on unidirectional nanoprisms
Authors
Ji-Eun LeeChoojin ParkKyungwha ChungJu Won LimFilipe Marques MotaJEONG, UNYONGDong Ha Kim
Date Issued
Jan-2018
Publisher
Royal Society of Chemistry
Abstract
Well-defined ordered arrays of plasmonic nanostructures were fabricated on stretchable substrates and tunable plasmon-coupling-based sensing properties were comprehensively demonstrated upon extension and contraction. Regular nanoprism patterns consisting of Ag, Au and Ag/Au bilayers were constructed on the stretchable polydimethylsiloxane substrate. The nanoprisms had the same orientation over the entire substrate (3 x 3 cm(2)) via metal deposition on a single-crystal microparticle monolayer assembly. The plasmonic sensor based on the Ag/Au bilayer showed a 6-fold enhanced surface enhanced Raman scattering signal under 20% uniaxial extension, whereas a 3-fold increase was observed upon 6% contraction, compared with the Au nanoprism arrays. The sensory behaviors were corroborated by finite-difference time-domain simulation, demonstrating the tunable electromagnetic field enhancement effect via the localized surface plasmon resonance coupling. The advanced flexible plasmonic-coupling-based devices with tunable and quantifiable performance herein suggested are expected to unlock promising potential in practical bio-sensing, biotechnological applications and optical devices.
URI
http://oasis.postech.ac.kr/handle/2014.oak/41185
ISSN
2040-3364
Article Type
Article
Citation
Nanoscale, vol. 10, no. 8, page. 4105 - 4112, 2018-01
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 JEONG, UNYONG
Dept of Materials Science & Enginrg
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