128055 20241125101132.0 doi 10.1016/j.apmt.2023.101929 sideral 135217 ART-2023-135217 eng Lafuente, Marta Exploring the surface-enhanced Raman scattering (SERS) activity of gold nanostructures embedded around nanogaps at wafer scale: Simulations and experiments 2023 Access copy available to the general public Unrestricted A unique way of converting free space light into a local electromagnetic field in small spaces is via metallic nanostructuring. In this work fabrication, experimental characterization and simulation of surface-enhanced Raman scattering (SERS) active specimens based on Au nanostructures are discussed. We used displacement Talbot lithography (DTL) to fabricate silicon nano-wedge substrates with Au nanostructures embedded around their apices. After the ion beam etching process, a nanogap is introduced between two Au nanostructures templated over nano-wedges, yielding specimens with SERS characteristics. The Au nanostructures and the nanogaps have symmetric and asymmetric configurations with respect to the wedges. With this nanofabrication method, various wafer-scale specimens were fabricated with highly controllable nanogaps with a size in the order of 6 nm for symmetric gaps and 8 nm for asymmetric gaps. SERS characteristics of these specimens were analyzed experimentally by calculating their analytical enhancement factor (AEF). According to finite-difference time-domain (FDTD) simulations, the Raman enhancement arises at the narrow gap due to plasmonic resonances, yielding a maximum AEF of 6.9 × 106. The results highlight the SERS activity of the nanostructures and ultimately comply with reliable substrates for practical applications. info:eu-repo/grantAgreement/EC/H2020/883390/EU/Advanced Surface Enhanced Raman Spectroscopy (SERS) based technologies for gas and liquids sensING in the area of chemical protection/SERSing This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 883390-SERSing info:eu-repo/grantAgreement/ES/MICINN/PID2019-108660RB-I00 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 7.2 2023 MATERIALS SCIENCE, MULTIDISCIPLINARY 85 / 439 = 0.194 2023 Q1 T1 1.623 2023 Materials Science (miscellaneous) 2023 Q1 14.9 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Muñoz, Pablo Berenschot, Erwin J.W. Tiggelaar, Roald M. Susarrey-Arce, Arturo Gutiérrez Rodrigo, Sergio Kooijman, Lucas J. García-Blanco, Sonia M. Mallada, Reyes Universidad de Zaragoza (orcid)0000-0002-4758-9380 Pina, María P. Universidad de Zaragoza (orcid)0000-0001-9897-6527 Tas, Niels R. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 35 (2023), 101929 [12 pp.] Applied Materials Today 2352-9407 10827877 http://zaguan.unizar.es/record/128055/files/texto_completo.pdf Versión publicada 2512872 http://zaguan.unizar.es/record/128055/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:128055 articulos driver 2024-11-22-11:59:10 ARTICLE