Print Email Facebook Twitter Raman spectroscopy of silicon with nanostructured surface Title Raman spectroscopy of silicon with nanostructured surface Author Kadlečíková, Magdaléna (Slovak University of Technology) Vančo, Ľubomír (Slovak University of Technology) Breza, Juraj (Slovak University of Technology) Mikolášek, Miroslav (Slovak University of Technology) Hušeková, Kristína (Slovak Academy of Sciences) Fröhlich, Karol (Slovak Academy of Sciences) Procel Moya, P.A. (TU Delft Photovoltaic Materials and Devices) Zeman, M. (TU Delft Electrical Sustainable Energy) Isabella, O. (TU Delft Photovoltaic Materials and Devices) Department Electrical Sustainable Energy Date 2022 Abstract We compared the morphology and Raman response of nanoscale shaped surfaces of Si substrates versus monocrystalline Si. Samples were structured by reactive ion etching, and four of them were covered by a RuO2-IrO2 layer. Raman bands, centred at approx. 520 cm–1, belonging to samples processed by etching the Si surface have intensities higher by approximately one order of magnitude than those of reference non-etched samples. For nanostructured samples, the rise in the Raman signal was 12–14 ×, which is in agreement with the model of the electric field at the tips of Si due to their geometry. This phenomenon is related to the high absorption of excitation radiation. Nanostructured surfaces of samples containing a layer of RuO2-IrO2 give rise to the phenomenon of surface enhancement of the Raman response most likely due to the charge transfer at the interface between silicon and conductive oxides. The nanostructured surface of Si without a metal layer behaves as a SERS substrate and detects the analytes at a low concentration. Subject Black siliconNanolayer RuO-IrOSERS To reference this document use: http://resolver.tudelft.nl/uuid:f0f1d83a-a5ee-47ac-a5a7-469e974c50f4 DOI https://doi.org/10.1016/j.ijleo.2022.168869 Embargo date 2023-07-01 ISSN 0030-4026 Source Optik, 257 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 Magdaléna Kadlečíková, Ľubomír Vančo, Juraj Breza, Miroslav Mikolášek, Kristína Hušeková, Karol Fröhlich, P.A. Procel Moya, M. Zeman, O. Isabella Files PDF 1_s2.0_S0030402622002625_main.pdf 8.2 MB Close viewer /islandora/object/uuid:f0f1d83a-a5ee-47ac-a5a7-469e974c50f4/datastream/OBJ/view