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Article

Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites

by
Yerulan Sagidolda
1,2,
Saule Yergaliyeva
1,
Zhandos Tolepov
1,2,
Guzal Ismailova
1,
Bakytzhan Orynbay
1,2,
Renata Nemkayeva
2,
Oleg Prikhodko
1,
Svetlana Peshaya
1,
Suyumbika Maksimova
1,
Nazim Guseinov
2 and
Yerzhan Mukhametkarimov
1,2,*
1
Department of Physics and Technology, Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty 050040, Kazakhstan
2
National Nanotechnology Laboratory of Open Type, Al-Farabi av. 71/23, Almaty 050040, Kazakhstan
*
Author to whom correspondence should be addressed.
Materials 2023, 16(20), 6809; https://doi.org/10.3390/ma16206809
Submission received: 18 September 2023 / Revised: 19 October 2023 / Accepted: 20 October 2023 / Published: 22 October 2023
(This article belongs to the Special Issue Advances in Metal Oxide Semiconductor Thin Films and Devices)
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Abstract

As nanotechnology continues to advance, the study of nanocomposites and their unique properties is at the forefront of research. There are still various blank spots in understanding the behavior of such composite materials, especially regarding plasmonic effects like localized surface plasmon resonance (LSPR) which is essential for developing advanced nanotechnologies. In this work, we explore the structural properties of composite thin films consisting of oxide matrices and gold nanoparticles (Au NPs), which were prepared by radio-frequency magnetron sputtering. Titanium dioxide (TiO2) and tungsten trioxide (WO3) were chosen as the host matrices of the composites. Such composite thin films owing to the presence of Au NPs demonstrate the LSPR phenomenon in the visible region. It is shown, that spectroscopic study, in particular, Raman spectroscopy can reveal peculiar features of structures of such composite systems due to LSPR and photoluminescence (PL) of Au NPs in the visible spectrum. In particular, defect peaks of TiO2 (700–720 cm−1) or WO3 (935 cm−1) in Raman spectra can be clearly observed when the samples are illuminated with a 633 nm excitation laser. Excitation with 532 nm leads to a decrease in the intensity of the defect peak, which totally disappears at 473 nm excitation. Such dependences of the defect peaks on excitation laser wavelength are probably related to the polarization of the matrix’s defective regions close to the interface with gold NPs.
Keywords: gold nanoparticles; oxide thin films; radio frequency magnetron sputtering; Raman spectroscopy; plasmonics gold nanoparticles; oxide thin films; radio frequency magnetron sputtering; Raman spectroscopy; plasmonics

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MDPI and ACS Style

Sagidolda, Y.; Yergaliyeva, S.; Tolepov, Z.; Ismailova, G.; Orynbay, B.; Nemkayeva, R.; Prikhodko, O.; Peshaya, S.; Maksimova, S.; Guseinov, N.; et al. Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites. Materials 2023, 16, 6809. https://doi.org/10.3390/ma16206809

AMA Style

Sagidolda Y, Yergaliyeva S, Tolepov Z, Ismailova G, Orynbay B, Nemkayeva R, Prikhodko O, Peshaya S, Maksimova S, Guseinov N, et al. Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites. Materials. 2023; 16(20):6809. https://doi.org/10.3390/ma16206809

Chicago/Turabian Style

Sagidolda, Yerulan, Saule Yergaliyeva, Zhandos Tolepov, Guzal Ismailova, Bakytzhan Orynbay, Renata Nemkayeva, Oleg Prikhodko, Svetlana Peshaya, Suyumbika Maksimova, Nazim Guseinov, and et al. 2023. "Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites" Materials 16, no. 20: 6809. https://doi.org/10.3390/ma16206809

APA Style

Sagidolda, Y., Yergaliyeva, S., Tolepov, Z., Ismailova, G., Orynbay, B., Nemkayeva, R., Prikhodko, O., Peshaya, S., Maksimova, S., Guseinov, N., & Mukhametkarimov, Y. (2023). Peculiarities of the Structure of Au-TiO2 and Au-WO3 Plasmonic Nanocomposites. Materials, 16(20), 6809. https://doi.org/10.3390/ma16206809

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