Fabrication of flexible, cost-effective, and scalable silver substrates for efficient surface enhanced Raman spectroscopy based trace detection

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buir.contributor.authorDemir, Ahmet Kemal
buir.contributor.orcidDemir, Ahmet Kemal|0000-0002-3251-9793
dc.citation.epage126542-8en_US
dc.citation.spage126542-1en_US
dc.citation.volumeNumber619en_US
dc.contributor.authorKhan, G. A.
dc.contributor.authorDemirtaş, Ö.
dc.contributor.authorAytekin, Ö.
dc.contributor.authorDemir, Ahmet Kemal
dc.contributor.authorBek, A.
dc.contributor.authorBhatti, A. S.
dc.contributor.authorAhmed, W.
dc.date.accessioned2022-01-28T08:19:24Z
dc.date.available2022-01-28T08:19:24Z
dc.date.issued2021-06-20
dc.departmentDepartment of Physicsen_US
dc.description.abstractThe fabrication and optimization of cost-effective, eco-friendly, uniform and flexible SERS platforms by facile synthesis routes has recently attracted great attention for trace detection of various analytes. Herein, we report the fabrication of interconnected Ag nanostructures on the unmodified filter paper-based flexible substrates by a facile recipe, which involves evaporation of Ag precursor solution on the filter paper followed by its reduction with a strong reducing agent, NaBH4. The fabrication process is time-efficient, reproducible, and has the potential of being scaled up. The presence of inter-connected nanostructures results in high concentration of uniformly distributed hotspots on the substrate, which in turn provide excellent and reproducible SERS sensitivity. The finite element simulation results showed that fabricated nanostructures are much more effective for field enhancement as compared to the agglomerated spherical nanoparticles. Crystal violet (CV) concentration of 10−8 M was easily detected with these substrates both via solution drying and swabbing. Similarly, AgFPS have proven effective for swab-based detection of urea nitrate (UN), a well-known constituent of homemade explosives. The C-N and NO3- symmetric stretching modes of UN are detectable down to 1 µM and 100 µM concentrations, respectively. Moreover, these substrates showed SERS signal uniformity both from different spots of a single substrate, and substrates from different batches, with spot-to-spot relative standard deviation (RSD) of 15% and sample-to-sample RSD of 15–19%. This makes them excellent for reliable and quick quantitative detection. The simple synthesis strategy, flexibility, cost-effectiveness, and quantitative detection makes these substrates ideal for SERS based trace detection, especially for on-site analysis, and various sensing applications.en_US
dc.description.provenanceSubmitted by Samet Emre (samet.emre@bilkent.edu.tr) on 2022-01-28T08:19:24Z No. of bitstreams: 1 Fabrication_of_flexible,_cost-effective,_and_scalable_silver_substrates_for_efficient_surface_enhanced_Raman_spectroscopy_based_trace_detection.pdf: 5241131 bytes, checksum: 50ddc8651854ac4077823ab3253bf722 (MD5)en
dc.description.provenanceMade available in DSpace on 2022-01-28T08:19:24Z (GMT). No. of bitstreams: 1 Fabrication_of_flexible,_cost-effective,_and_scalable_silver_substrates_for_efficient_surface_enhanced_Raman_spectroscopy_based_trace_detection.pdf: 5241131 bytes, checksum: 50ddc8651854ac4077823ab3253bf722 (MD5) Previous issue date: 2021-06-20en
dc.embargo.release2023-06-20
dc.identifier.doi10.1016/j.colsurfa.2021.126542en_US
dc.identifier.eissn1873-4359
dc.identifier.urihttp://hdl.handle.net/11693/76863
dc.language.isoEnglishen_US
dc.publisherElsevier BVen_US
dc.relation.isversionofhttps://doi.org/10.1016/j.colsurfa.2021.126542en_US
dc.source.titleColloids and Surfaces A: Physicochemical and Engineering Aspectsen_US
dc.subjectAg nanostructuresen_US
dc.subjectTrace detectionen_US
dc.subjectSERSen_US
dc.subjectSwab detectionen_US
dc.subjectSurfactant free nanostructuresen_US
dc.subjectPlasmonicsen_US
dc.titleFabrication of flexible, cost-effective, and scalable silver substrates for efficient surface enhanced Raman spectroscopy based trace detectionen_US
dc.typeArticleen_US

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