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dc.contributor.authorKarabel Öcal, S.en_US
dc.contributor.authorPekdemir, S.en_US
dc.contributor.authorSerhatlıoğlu, Muraten_US
dc.contributor.authorİpekçi, H. H.en_US
dc.contributor.authorŞahmetlioğlu, E.en_US
dc.contributor.authorNarin, İ.en_US
dc.contributor.authorDuman, F.en_US
dc.contributor.authorElbüken, Çağlaren_US
dc.contributor.authorDemirel, G.en_US
dc.contributor.authorÖnses, Mustafa Serdaren_US
dc.date.accessioned2020-02-12T07:50:55Z
dc.date.available2020-02-12T07:50:55Z
dc.date.issued2019
dc.identifier.issn2168-0485
dc.identifier.urihttp://hdl.handle.net/11693/53298
dc.description.abstractWe report completely sustainable processes and materials for inexpensive and scalable fabrication of plasmonically active solid substrates, which are critical for emerging applications in sensing, catalysis, and metasurfaces. Our approach involves grafting of poly(ethylene glycol) (PEG) onto silicon oxide terminated solid substrates using all-water based processing leading to an ultrathin (12 nm) and smooth (roughness of ∼1 nm) functional layer. The resulting surfaces facilitate robust and effective immobilization of gold nanoparticles (NPs) with a density that is superior to the organic solvent based processing. This new process achieves size dependent assembly of the citrate-stabilized gold NPs resulting in high plasmonic activity in surface-enhanced Raman scattering (SERS). The use of leaf extracts derived from Quercus pubescens as a reducing and stabilizing agent allowed for green synthesis of gold NPs with an average diameter of 25.6 ± 11.1 nm. The assembly of the green synthesized gold NPs on all-water processed PEG grafted layers enabled a fully sustainable route for fabrication of plasmonically active solid substrates. The resulting substrates exhibited high SERS response over the entire (∼1 cm2) substrate surface with an analytical enhancement factor of 9.48 × 104 for the probe molecule rhodamine 6G under 532 nm laser excitation. A microfluidic device was also constructed on the fabricated platform for SERS mediated simultaneous detection of two nonsteroidal anti-inflammatory drugs, dexketoprofen and ibuprofen, which are widely used in human medicine and present as contaminants in wastewater. The biocompatibility of PEG together with all-water based processing overcome the need for waste management and ventilation of the working place enabling cost and energy efficient, environmentally benign fabrication of plasmonic devices.en_US
dc.language.isoEnglishen_US
dc.source.titleACS Sustainable Chemistry and Engineeringen_US
dc.relation.isversionofhttps://dx.doi.org/10.1021/acssuschemeng.8b06133en_US
dc.subjectGreen chemistryen_US
dc.subjectPlasmonicsen_US
dc.subjectFunctional surfacesen_US
dc.subjectSERSen_US
dc.subjectEnd-grafted poly(ethylene glycol)en_US
dc.titleEco-friendly fabrication of plasmonically active substrates based on end-grafted poly(ethylene glycol) layersen_US
dc.typeArticleen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.citation.spage4315en_US
dc.citation.epage4324en_US
dc.citation.volumeNumber7en_US
dc.citation.issueNumber4en_US
dc.identifier.doi10.1021/acssuschemeng.8b06133en_US
dc.publisherAmerican Chemical Societyen_US
dc.contributor.bilkentauthorSerhatlıoğlu, Murat
dc.contributor.bilkentauthorElbüken, Çağlar
dc.contributor.bilkentauthorÖnses, Mustafa Serdar


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