Combining 3-D plasmonic gold nanorod arrays with colloidal nanoparticles as a versatile concept for reliable, sensitive, and selective molecular detection by SERS

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dc.contributor.authorYilmaz, Mehmet
dc.contributor.authorSenlik, Erhan
dc.contributor.authorBiskin, Erhan
dc.contributor.authorYavuz, Mustafa Selman
dc.contributor.authorTamer, Ugur
dc.contributor.authorDemirel, Gokhan
dc.date.accessioned2020-03-26T18:49:45Z
dc.date.available2020-03-26T18:49:45Z
dc.date.issued2014
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe detection of molecules at an ultralow level by Surface-Enhanced Raman Spectroscopy (SERS) has recently attracted enormous interest for various applications especially in biological, medical, and environmental fields. Despite the significant progress, SERS systems are still facing challenges for practical applications related to their sensitivity, reliability, and selectivity. To overcome these limitations, in this study, we have proposed a simple yet facile concept by combining 3-D anisotropic gold nanorod arrays with colloidal gold nanoparticles having different shapes for highly reliable, selective, and sensitive detection of some hazardous chemical and biological warfare agents in trace amounts through SERS. The gold nanorod arrays were created on the BK7 glass slides or silicon wafer surfaces via the oblique angle deposition (OAD) technique without using any template material or lithography technique and their surface densities were adjusted by manipulating the deposition angle (a). It is found that gold nanorod arrays fabricated at alpha = 10 degrees exhibited the highest SERS enhancement in the absence of colloidal gold nanoparticles. Synergetic enhancement was obviously observed in SERS signals when combining gold nanorod arrays with colloidal gold nanoparticles having different shapes (i.e., spherical, rod, and cage). Due to their ability to produce localized surface plasmons (LSPs) in transverse and longitudinal directions, utilization of colloidal gold nanorods as a synergetic agent led to an increase in the enhancement factor by about tenfold compared to plain gold nanorod arrays. Moreover, we have tested our approach to detect some chemical and biological toxins namely dipicolinic acid (DIP), methyl parathion (MP), and diethyl phosphoramidate (DP). For all toxins, Raman spectra with high signal-to-noise ratios and reproducibility were successfully obtained over a broad concentration range (5 ppm-10 ppb). Our results suggest that the slightly tangled and closely-packed anisotropic gold nanorod arrays reinforced by the gold nanoparticles may serve as an ideal SERS substrate to detect any analyte in trace amounts.en_US
dc.description.sponsorshipScientific and Technological Research Council (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [111M237, 112T560]; TUBITAK BIDEB fellowshipTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK); Turkish Academy of ScienceTurkish Academy of Sciencesen_US
dc.description.sponsorshipThis work was supported by the Scientific and Technological Research Council (TUBITAK) grant numbers 111M237 and 112T560. MY is supported by TUBITAK BIDEB fellowship. EP also acknowledges support from the Turkish Academy of Science as a full member. The authors would like to thank Hakan Erdogan for useful discussions.en_US
dc.identifier.doi10.1039/c3cp55087gen_US
dc.identifier.endpage5570en_US
dc.identifier.issn1463-9076en_US
dc.identifier.issn1463-9084en_US
dc.identifier.issue12en_US
dc.identifier.pmid24514029en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage5563en_US
dc.identifier.urihttps://dx.doi.org/10.1039/c3cp55087g
dc.identifier.urihttps://hdl.handle.net/20.500.12395/30678
dc.identifier.volume16en_US
dc.identifier.wosWOS:000332396500013en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherROYAL SOC CHEMISTRYen_US
dc.relation.ispartofPHYSICAL CHEMISTRY CHEMICAL PHYSICSen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleCombining 3-D plasmonic gold nanorod arrays with colloidal nanoparticles as a versatile concept for reliable, sensitive, and selective molecular detection by SERSen_US
dc.typeArticleen_US

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