SURFACE-ENHANCED RAMAN SCATTERING FROM DYE MOLECULES IN SILICON NANOWIRE STRUCTURES DECORATED BY GOLD NANOPARTICLES
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Date
2022-02-26
Authors
Ikramova, Saltanat B.
Utegulov, Zhandos N.
Dikhanbayev, Kadyrjan K.
Gaipov, Abduzhappar E.
Nemkayeva, Renata R.
Yakunin, Valery G.
Savinov, Vladimir P.
Timoshenko, Victor Yu
Journal Title
Journal ISSN
Volume Title
Publisher
International Journal of Molecular Sciences
Abstract
Silicon nanowires (SiNWs) prepared by metal-assisted chemical etching of crystalline
silicon wafers followed by deposition of plasmonic gold (Au) nanoparticles (NPs) were explored
as templates for surface-enhanced Raman scattering (SERS) from probe molecules of Methylene
blue and Rhodamine B. The filling factor by pores (porosity) of SiNW arrays was found to control
the SERS efficiency, and the maximal enhancement was observed for the samples with porosity of
55%, which corresponded to dense arrays of SiNWs. The obtained results are discussed in terms of
the electromagnetic enhancement of SERS related to the localized surface plasmon resonances in
Au-NPs on SiNW’s surfaces accompanied with light scattering in the SiNW arrays. The observed
SERS effect combined with the high stability of Au-NPs, scalability, and relatively simple preparation
method are promising for the application of SiNW:Au-NP hybrid nanostructures as templates in
molecular sensorics.
Description
Keywords
Type of access: Open Access, surface-enhanced Raman scattering, plasmonics, gold, nanoparticles, silicon, nanostructures, mesopores, nanowires, molecular sensorics
Citation
Ikramova, S. B., Utegulov, Z. N., Dikhanbayev, K. K., Gaipov, A. E., Nemkayeva, R. R., Yakunin, V. G., Savinov, V. P., & Timoshenko, V. Y. (2022). Surface-Enhanced Raman Scattering from Dye Molecules in Silicon Nanowire Structures Decorated by Gold Nanoparticles. International Journal of Molecular Sciences, 23(5), 2590. https://doi.org/10.3390/ijms23052590