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

IF 3.2 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part B: Atomic Spectroscopy Pub Date : 2025-02-18 DOI:10.1016/j.sab.2025.107159

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

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引用次数: 0

Abstract

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.

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基于有序衬底的金膜覆盖SiO2微球，用于提高激光诱导击穿光谱方法在纳米颗粒研究中的灵敏度

在这项工作中，我们提出了一种有序的衬底，通过垂直沉积SiO2微球并涂上金层来提高激光诱导击穿光谱（LIBS）方法分析TiO2纳米粒子的灵敏度。等离子体有序结构增强libs方法（POSELIBS）通过有序衬底的局部表面等离子体共振提供增强。利用计算机模拟，研究了最大局部场放大与激发波长和衬底几何参数的关系。选择接近共振的条件来获得LIBS信号的最大放大。对非谐振和近谐振有序衬底进行了测量，结果与建模结果一致。使用有序衬底，钛发射线的强度增加超过一个数量级，以及信号稳定性的显着增加，已被证明。还确定了最有效增强信号的最佳颗粒浓度。通过该方法合成的有序衬底是在宽激发波长范围内增强LIBS信号共振的便捷途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Spectrochimica Acta Part B: Atomic Spectroscopy 物理-光谱学

CiteScore

6.10

自引率

12.10%

发文量

173

审稿时长

81 days

期刊介绍： Spectrochimica Acta Part B: Atomic Spectroscopy, is intended for the rapid publication of both original work and reviews in the following fields: Atomic Emission (AES), Atomic Absorption (AAS) and Atomic Fluorescence (AFS) spectroscopy; Mass Spectrometry (MS) for inorganic analysis covering Spark Source (SS-MS), Inductively Coupled Plasma (ICP-MS), Glow Discharge (GD-MS), and Secondary Ion Mass Spectrometry (SIMS). Laser induced atomic spectroscopy for inorganic analysis, including non-linear optical laser spectroscopy, covering Laser Enhanced Ionization (LEI), Laser Induced Fluorescence (LIF), Resonance Ionization Spectroscopy (RIS) and Resonance Ionization Mass Spectrometry (RIMS); Laser Induced Breakdown Spectroscopy (LIBS); Cavity Ringdown Spectroscopy (CRDS), Laser Ablation Inductively Coupled Plasma Atomic Emission Spectroscopy (LA-ICP-AES) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). X-ray spectrometry, X-ray Optics and Microanalysis, including X-ray fluorescence spectrometry (XRF) and related techniques, in particular Total-reflection X-ray Fluorescence Spectrometry (TXRF), and Synchrotron Radiation-excited Total reflection XRF (SR-TXRF). Manuscripts dealing with (i) fundamentals, (ii) methodology development, (iii)instrumentation, and (iv) applications, can be submitted for publication.