147992 20250110163828.0 doi 10.1016/j.apsusc.2019.144663 sideral 116911 ART-2020-116911 eng Lafuente, Marta Universidad de Zaragoza (orcid)0000-0003-2660-3726 Towards the reproducible fabrication of homogeneous SERS substrates by Langmuir-Schaefer technique: A low cost and scalable approach for practical SERS based sensing applications 2020 The development of homogeneous, endurable and low cost SERS (Surface Enhancement Raman Spectroscopy) substrates is becoming of outmost importance due to growing interest in SERS technique for analytical applications. Here, we use the Langmuir-Schaefer technique to produce, as demonstrated by Atomic Force Microscopy and Scanning Electron Microscopy, homogeneous tightly-packed films of 27 nm in diameter octadecylthiolate capped gold nanoparticles in a reproducible and simple manner. The fabricated Au-based SERS substrates result in an analytical enhancement factor (AEF) of 4.3 × 108 and enable the detection of Rhodamine 6G in a 10-11 M aqueous solution, with remarkable spatial uniformity of the SERS response over a scanned area of 0.4 cm2. In addition, the developed procedure is highly reproducible from batch to batch with a standard deviation below 10% in the SERS signal. Finally, these substrates exhibit durable SERS properties, i.e. experimentally validated 16 months after its fabrication. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA-FEDER/E31-17R info:eu-repo/grantAgreement/ES/MICINN/CTQ2013-49068-C2-1-R info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 6.707 2020 CHEMISTRY, PHYSICAL 37 / 162 = 0.228 2020 Q1 T1 PHYSICS, CONDENSED MATTER 16 / 69 = 0.232 2020 Q1 T1 PHYSICS, APPLIED 30 / 160 = 0.188 2020 Q1 T1 MATERIALS SCIENCE, COATINGS & FILMS 1 / 21 = 0.048 2020 Q1 T1 1.294 2020 Chemistry (miscellaneous) 2020 Q1 Condensed Matter Physics 2020 Q1 Surfaces, Coatings and Films 2020 Q1 Surfaces and Interfaces 2020 Q1 Physics and Astronomy (miscellaneous) 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion Ruiz-Rincón, Silvia Mallada, Reyes Universidad de Zaragoza (orcid)0000-0002-4758-9380 Cea, Pilar Universidad de Zaragoza (orcid)0000-0002-4729-9578 Pina, María Pilar Universidad de Zaragoza (orcid)0000-0001-9897-6527 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 2012 755 Universidad de Zaragoza Dpto. Química Física Área Química Física 506 (2020), 144663 1-8 Appl. surf. sci. Applied Surface Science 0169-4332 1929523 http://zaguan.unizar.es/record/147992/files/texto_completo.pdf Preprint 1568220 http://zaguan.unizar.es/record/147992/files/texto_completo.jpg?subformat=icon icon Preprint oai:zaguan.unizar.es:147992 articulos driver 2025-01-10-14:24:41 ARTICLE