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Nanostructured Silver Substrates With Stable and Universal SERS Properties: Application to Organic Molecules and Semiconductor Nanoparticles |
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| Authors: | M. V. Chursanova V. M. Dzhagan V. O. Yukhymchuk O. S. Lytvyn M. Ya. Valakh I. A. Khodasevich D. Lehmann D. R. T. Zahn C. Waurisch S. G. Hickey |
| Affiliation: | (1) National Technical University of Ukraine “KPI”, 37 Prospect Peremohy, 03056 Kyiv, Ukraine;(2) V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine;(3) B.I. Stepanov Institute of Physics of National Academy of Sciences of Belarus, 220072 Minsk, Belarus;(4) Semiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany;(5) Physical Chemistry/Electrochemistry, IFW Dresden, 01171 Dresden, Germany |
| Abstract: | Nanostructured silver films have been prepared by thermal deposition on silicon, and their properties as SERS substrates investigated. The optimal conditions of the post-growth annealing of the substrates were established. Atomic force microscopy study revealed that the silver films with relatively dense and homogeneous arrays of 60–80-nm high pyramidal nanoislands are the most efficient for SERS of both organic dye and inorganic nanoparticles analytes. The noticeable enhancement of the Raman signal from colloidal nanoparticles with the help of silver island films is reported for the first time. |
| Keywords: | SERS Ag/Si nanoisland films Post-growth annealing Rhodamine 6G CdSe Nanoparticles |
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