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

20 Scopus citations


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
Issue number8
StatePublished - 28 Feb 2018

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© 2018 The Royal Society of Chemistry.


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