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

被引：4

作者：

Sagidolda, Yerulan ^{[1
,2
]}

Yergaliyeva, Saule ^{[1
]}

Tolepov, Zhandos ^{[1
,2
]}

Ismailova, Guzal ^{[1
]}

Orynbay, Bakytzhan ^{[1
,2
]}

Nemkayeva, Renata ^{[2
]}

Prikhodko, Oleg ^{[1
]}

Peshaya, Svetlana ^{[1
]}

Maksimova, Suyumbika ^{[1
]}

Guseinov, Nazim ^{[2
]}

Mukhametkarimov, Yerzhan ^{[1
,2
]}

机构：

[1] Al Farabi Kazakh Natl Univ, Dept Phys & Technol, Al Farabi Av 71, Alma Ata 050040, Kazakhstan

[2] Natl Nanotechnol Lab Open Type, Al Farabi Av 71 23, Alma Ata 050040, Kazakhstan

来源：

MATERIALS | 2023年 / 16卷 / 20期

关键词：

gold nanoparticles; oxide thin films; radio frequency magnetron sputtering; Raman spectroscopy; plasmonics; OPTICAL-PROPERTIES; THIN-FILMS; TIO2; SURFACE; RESONANCE; PHOTOCATALYSIS;

D O I：

10.3390/ma16206809

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：13

共 38 条

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