Localized surface plasmon resonance phenomenon in Ag/Au-WO3-x nanocomposite thin films
Prikhodko O. Dosseke U. Nemkayeva R. Rofman O. Guseinov N. Mukhametkarimov Y.
1 September 2022Elsevier B.V.
Thin Solid Films
2022#757
The localized surface plasmon resonance was investigated in composite thin films based on amorphous sub-stoichiometric tungsten oxide (WO3-x) matrix and noble metal nanoparticles, such as silver (Ag), gold (Au), and their alloy (Ag/Au). The films were prepared by radio-frequency magnetron sputtering of a combined target consisting of lemon-colored tungsten trioxide powder and Ag and/or Au pellets. It was found that the mean size of nanoparticles for all composite thin films according to the results of transmission electron microscopy is less than 5 nm. The obtained films demonstrate tunable plasmon absorption band. The position of the localized surface plasmon resonance peak was experimentally observed at 435, 494, and 582 nm for Ag-WO3-x, Ag/Au-WO3-x and Au-WO3-x composite thin films, respectively. Blueshift of the localized surface plasmon resonance band in contrast with the results of Mie calculations for Ag-WO3-x film was explained by possible formation of oxide shell on the surface of Ag nanoparticles.
Plasmonic nanoparticle , Radio-frequency magnetron sputtering , Tungsten trioxide thin film
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National Nanotechnological Laboratory of Open Type, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
National Nanotechnological Laboratory of Open Type
The Institute of Nuclear Physics
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