Flexible and transparent Surface Enhanced Raman Scattering (SERS)-Active Ag NPs/PDMS composites for in-situ detection of food contaminants

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dc.check.date2021-04-01
dc.check.infoAccess to this article is restricted until 24 months after publication by request of the publisher.en
dc.contributor.authorAlyami, Abeer
dc.contributor.authorQuinn, Aidan J.
dc.contributor.authorIacopino, Daniela
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHorizon 2020en
dc.contributor.funderEuropean Regional Development Funden
dc.date.accessioned2019-04-05T08:42:30Z
dc.date.available2019-04-05T08:42:30Z
dc.date.issued2019-04-01
dc.date.updated2019-04-05T08:31:03Z
dc.description.abstractThe fabrication of flexible and transparent Surface Enhanced Raman Scattering (SERS) substrates enabling fast, sensitive and on site detection is relevant for the practical application of SERS for real world analysis, such as food safety and organic pollutants monitoring. In this work novel Ag NPs/PDMS composites were fabricated and employed for the SERS detection of food contaminants directly on food surfaces. Ag NPs/PDMS composites were obtained by self-assembly of organic Ag nanoparticle solutions on flexible PDMS surfaces. Preliminary evaluation of the suitability of Ag NPs/PDMS probes for SERS analysis showed that composites were characterized by a SERS enhancement factor (EF) of 3.1 × 105, good stability and resistance to harsh conditions as well as good uniformity and batch to bach reproducibility. The “sticky” nature of Ag NPs/PDMS composites was exploited to “paste” them on irregular analytical surfaces, thus enabling the detection in situ of food contaminant crystal violet (CV) and pesticide thiram, respectively. Specifically, CV and thiram concentrations as low as 1 × 10−7 M and 1 × 10−5 M were measured on contaminated fish skin and orange peel, respectively. Furthermore, efficient SERS detection by micro-extraction of CV from fish skin and thiram from fruit surfaces was achieved, showing the analytical versatility of the fabricated SERS composites.en
dc.description.sponsorshipScience Foundation Ireland (SFI under Grant Number SFI 16/RC/3918, co-funded by the European Regional Development Fund)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationAlyami, A., Quinn, A. J. and Iacopino, D. (2019) 'Flexible and transparent Surface Enhanced Raman Scattering (SERS)-Active Ag NPs/PDMS composites for in-situ detection of food contaminants', Talanta, 201, pp. 58-64. doi: 10.1016/j.talanta.2019.03.115en
dc.identifier.doi10.1016/j.talanta.2019.03.115en
dc.identifier.endpage64en
dc.identifier.issn0039-9140
dc.identifier.journaltitleTalantaen
dc.identifier.startpage58en
dc.identifier.urihttps://hdl.handle.net/10468/7717
dc.identifier.volume201en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::IA/646063/EU/NANOmaterials for the REStoration of works of ART/NANORESTARTen
dc.relation.urihttp://www.sciencedirect.com/science/article/pii/S0039914019303832
dc.rights© 2019 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectSERSen
dc.subjectFood contaminantsen
dc.subjectCompositesen
dc.subjectPesticidesen
dc.subjectFlexibleen
dc.subjectTransparenten
dc.titleFlexible and transparent Surface Enhanced Raman Scattering (SERS)-Active Ag NPs/PDMS composites for in-situ detection of food contaminantsen
dc.typeArticle (peer-reviewed)en
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