Viable stretchable plasmonics based on unidirectional nanoprisms

Lee, Ji-Eun, Park, Choojin, Chung, Kyungwha , Lim, Ju Won, Marques Mota, Filipe, Jeong, Unyong and Kim, Dong Ha (2018) Viable stretchable plasmonics based on unidirectional nanoprisms. Nanoscale, 10 (8). pp. 4105-4112. ISSN 2040-3372

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Viable stretchable plasmonics based on unidirectional nanoprisms
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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.

Keywords:plasmonic sensors
Subjects:F Physical Sciences > F200 Materials Science
F Physical Sciences > F110 Applied Chemistry
Divisions:College of Science > School of Chemistry
ID Code:53645
Deposited On:07 Mar 2023 14:39

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