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dc.contributor.authorLiu, Yejingen_US
dc.contributor.authorLee, Yih Hongen_US
dc.contributor.authorZhang, Qien_US
dc.contributor.authorCui, Yanen_US
dc.contributor.authorLing, Xing Yien_US
dc.identifier.citationLiu, Y., Lee, Y. H., Zhang, Q., Cui, Y., & Ling, X. Y. (2016). Plasmonic nanopillar arrays encoded with multiplex molecular information for anti-counterfeiting applications. Journal of Materials Chemistry C, 4(19), 4312-4319. doi:10.1039/c6tc00682een_US
dc.description.abstractA major challenge in information security and the development of an anti-counterfeiting platform is to encode multiple identification features on a single platform where these features can be decoded with no interference. Here, we demonstrate a progressively complex anti-counterfeiting platform using a multiplex fabrication strategy. This multiplex strategy enabled us to realize a spatially selective encapsulation of dye molecules within an Ag nanopillar array embedding covert molecular information which was revealed using fluorescence, surface-enhanced Raman scattering (SERS), and signal intensities. A total of five identification layers were used to authenticate products in our nanopillar platform. Moreover, two spectroscopic techniques were required to fully decode the various covert layers encoded within the same nanopillar array, thereby greatly enhancing the security of the information. Hyperspectral imaging was used to precisely generate unique SERS fingerprints of molecules encapsulated in each nanopillar. This feature combined with the high ∼17 000 pillars per inch (ppi) information density of the platform make its use extremely effective against counterfeiting and forgery. In summary, our encoding platform enables high security, large information density and low-error decoding.en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relation.ispartofJournal of Materials Chemistry Cen_US
dc.rights© 2016 The Royal Society of Chemistry. All rights reserved. This paper was published in Journal of Materials Chemistry C and is made available with permission of The Royal Society of Chemistry.en_US
dc.titlePlasmonic nanopillar arrays encoded with multiplex molecular information for anti-counterfeiting applicationsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsSurface-enhanced Raman Scatteringen_US
dc.description.acknowledgementWe gratefully thank Prof. Holger Schönherr, Mr Marc Steuber, and Dr Ping Li (Universität Siegen) for the fruitful discussion on the synthesis of methyl 2-(methyl(phenyl)amino)acetate. X. Y. L. and Y. H. L. are grateful for the support from the National Research Foundation, Singapore (NRF-NRFF2012-04), Nanyang Technological University’s start-up grant (M4080758).en_US
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