Magnetic-plasmonic Ni nanotubes covered with gold for improvement of SERS analysis
Korolkov I.V. Shumskaya A. Kozlovskiy A.L. Kaliyekperov M.E. Lissovskaya L.I. Zdorovets M.V.
25 April 2022Elsevier Ltd
Journal of Alloys and Compounds
2022#901
The paper describes the synthesis of substrate for surface enhanced Raman spectroscopy (SERS) based on magnetic nickel nanotubes (Ni NTs). For the success application of Ni NTs in quantitative SERS analysis of organic molecules by the example of Rhodamine 6G (R6G), electroless deposition of gold (I) on Ni NTs in alkali media was performed. The purity and uniformity of the gold layer has been proven by methods of XRD, SEM-EDX, XPS and FTIR analysis. The magnetic properties of the obtained magnetic Ni-Au NTs measured by VMS did not change compared to the initial Ni nanotubes. The efficiency of substrates with Ni-Au NTs is determined by the optical properties of the substrate (the position of the plasmon resonance peak). The substrates with scattered nanotubes having a plasmon resonance position at 530 nm are the most effective for use in SERS when using a laser with a wavelength of 532 nm, as exemplified by the spectra of Radomin 6G. SERS analysis of R6G using Ni-Au NTs in concentration range from 10−3 to 10−8 led to average enhancement factor of 8∙105.
Gold covering , Magnetic nanotubes , Nickel nanostructure , Rhodamine 6G , SERS
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L.N.Gumilyov Eurasian National University, Satpaev str., 5, Nur-Sultan, 010008, Kazakhstan
The Institute of Nuclear Physics, Ibragimov str., 1, Almaty, 050032, Kazakhstan
Institute of Chemistry of new materials of the National Academy of Sciences of Belarus, Minsk, Belarus
Ural Federal University, Mira str. 19, Ekaterinburg, 620002, Russian Federation
L.N.Gumilyov Eurasian National University
The Institute of Nuclear Physics
Institute of Chemistry of new materials of the National Academy of Sciences of Belarus
Ural Federal University
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