Fabrication of a Self-Assembled and Flexible SERS Nanosensor for Explosive Detection at Parts-Per-Quadrillion Levels from Fingerprints

dc.contributor.authorLiyanage, Thakshila
dc.contributor.authorRael, Ashur
dc.contributor.authorShaffer, Sidney
dc.contributor.authorZaidi, Shozaf
dc.contributor.authorGoodpaster, John V.
dc.contributor.authorSardar, Rajesh
dc.contributor.departmentChemistry and Chemical Biology, School of Scienceen_US
dc.date.accessioned2019-03-07T20:48:21Z
dc.date.available2019-03-07T20:48:21Z
dc.date.issued2018-05
dc.description.abstractApart from high sensitivity and selectivity of surface-enhanced Raman scattering (SERS)-based trace explosive detection, efficient sampling of explosive residue from real world surfaces is very important for homeland security applications. Herein, we demonstrate an entirely new SERS nanosensor fabrication approach. The SERS nanosensor was prepared by self-assembling chemically synthesized gold triangular nanoprisms (Au TNPs), which we show display strong electromagnetic field enhancements at the sharp tips and edges, onto a pressure-sensitive flexible adhesive film. Our SERS nanosensor provides excellent SERS activity (enhancement factor = ∼6.0 × 106) and limit of detection (as low as 56 parts-per-quadrillions) with high selectivity by chemometric analyses among three commonly military high explosives (TNT, RDX, and PETN). Furthermore, the SERS nanosensors present excellent reproducibility (<4.0% relative standard deviation at 1.0 μM concentration) and unprecedentedly high stability with a “shelf life” of at least 5 months. Finally, TNT and PETN were analyzed and quantified by transferring solid explosive residues from fingerprints left on solid surfaces to the SERS nanosensor. Taken together, the demonstrated sensitivity, selectivity, and reliability of the measurements as well as with the excellent shelf life of our SERS nanosensors obviate the need for complicated sample processing steps required for other analytical techniques, and thus these nanosensors have tremendous potential not only in the field of measurement science but also for homeland security applications to combat acts of terror and military threats.en_US
dc.eprint.versionAuthor's manuscripten_US
dc.identifier.citationLiyanage, T., Rael, A., Shaffer, S., Zaidi, S., Goodpaster, J. V., & Sardar, R. (2018). Fabrication of a self-assembled and flexible SERS nanosensor for explosive detection at parts-per-quadrillion levels from fingerprints. Analyst, 143(9), 2012–2022. https://doi.org/10.1039/C8AN00008Een_US
dc.identifier.urihttps://hdl.handle.net/1805/18572
dc.language.isoenen_US
dc.publisherRSCen_US
dc.relation.isversionof10.1039/C8AN00008Een_US
dc.relation.journalAnalysten_US
dc.rightsPublisher Policyen_US
dc.sourceAuthoren_US
dc.subjectsurface-enhanced Raman scattering nanosensoren_US
dc.subjectexplosive detectionen_US
dc.subjectfingerprintsen_US
dc.titleFabrication of a Self-Assembled and Flexible SERS Nanosensor for Explosive Detection at Parts-Per-Quadrillion Levels from Fingerprintsen_US
dc.typeArticleen_US
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