Viable stretchable plasmonics based on unidirectional nanoprisms
- 등재 SCIE, SCOPUS
- 발행기관 Royal Society of Chemistry
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000149691
- 본문언어 영어
- Published As http://dx.doi.org/10.1039/c7nr08299a
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
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 × 3 cm2) 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. © 2018 The Royal Society of Chemistry.
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