Viable stretchable plasmonics based on unidirectional nanoprisms

Ji Eun Lee, Choojin Park, Kyungwha Chung, Ju Won Lim, Filipe Marques Mota, Unyong Jeong, Dong Ha Kim

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

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 × 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.

Original languageEnglish
Pages (from-to)4105-4112
Number of pages8
JournalNanoscale
Volume10
Issue number8
DOIs
StatePublished - 28 Feb 2018

Bibliographical note

Funding Information:
This study was supported by the National Research Foundation of Korea Grant funded by the Korean Government (2017R1A2A1A05022387). U. Jeong acknowledges the support from Samsung Research Funding Center of Samsung Electronics under Project Number SRFC-MA1301-07.

Publisher Copyright:
© 2018 The Royal Society of Chemistry.

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