Ordered substrate based on gold film over SiO2 microspheres for increasing the sensitivity of the laser-induced breakdown spectroscopy method in the study of nanoparticles

Shevchenko, M.A.; Maresev, A.N.; Astafurov, M.O.; Tcherniega, N.V.; Klimonsky, S.O.; Dorofeev, S.G.; Umanskaya, S.F.; Voronova, V.V.

Авторы: Shevchenko M.A., Maresev A.N., Astafurov M.O., Tcherniega N.V., Klimonsky S.O., Dorofeev S.G., Umanskaya S.F., Voronova V.V.
Журнал: Spectrochimica Acta - Part B: Atomic Spectroscopy
Том: 226
Год издания: 2025
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 107159
DOI: 10.1016/j.sab.2025.107159
Аннотация: In this work, we present an ordered substrate obtained by the vertical deposition of SiO2 microspheres coated with a gold layer to increase the sensitivity of the Laser-Induced Breakdown Spectroscopy (LIBS) method for analysis of TiO2 nanoparticles. Plasmonic-ordered-structure-enhanced-LIBS method (POSELIBS) provides enhancement due to localized surface plasmon resonance of an ordered substrate. Using computer modeling, the dependence of the maximum local field amplification on the excitation wavelength and geometric parameters of the substrate was investigated. Conditions close to resonance were selected to obtain the maximum amplification of the LIBS signal. Measurements were performed for off- and near-resonant ordered substrates, which are consistent with the modeling results. Using ordered substrates, an increase in the intensity of Ti emission lines by more than an order of magnitude, as well as a significant increase in signal stability, has been demonstrated. Optimal particle concentrations for the most effective signal enhancement were also determined. The ordered substrate synthesized via described method is a convenient way for LIBS signal resonance enhancement in a wide range of excitation wavelengths.
Добавил в систему: Климонский Сергей Олегович

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Ordered substrate based on gold film over SiO2 microspheres for increasing the sensitivity of the laser-induced breakdown spectroscopy method in the study of nanoparticlesстатья Исследовательская статья

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