Pesticide detection optimization of plasmonics gold nanoparticles/silicon nano-columns structures by controlling the coupling lasers power density

IF 2.1 4区工程技术 Q3 CHEMISTRY, INORGANIC & NUCLEAR Gold Bulletin Pub Date : 2022-12-20 DOI:10.1007/s13404-022-00323-x

Doaa Sulaiman, Alwan M. Alwan, Walid K. Hamoudi

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引用次数: 1

Abstract

Fixed laser pulse duty cycle at 20% using short laser wavelength (405 nm) at different values of laser power density (300–600 mW/cm²) were used to form Si nano-columns as based SERS layer. The idea was to synthesize SERS devices with excellent reproducibility and high enhancement factor to detect ultra-low residence of chlorpyrifos pesticide. The results indicated that the morphological aspects of silicon nano-columns layer and; hence, the performance of SERS devices could be well-regulated through the adjustment of laser power density. The SERS detection of ultra-low chlorpyrifos concentrations displayed an excellent reproducibility with less than 5% error. The highest chlorpyrifos enhancement factor (EF = 1.1 × 10⁶) and minimum detection limit (LOD = 22 × 10⁻⁸ M) were obtained from high altitude Si nano-columns; partly populated with three dimensions AuNPs layer, and the use of 500mW/cm² laser power density.

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控制耦合激光功率密度的等离子体金纳米粒子/硅纳米柱结构农药检测优化

摘要采用短激光波长(405 nm)，在不同的激光功率密度(300 ~ 600 mW/cm2)下，固定脉冲占空比为20%，形成硅纳米柱作为SERS层。本课题旨在合成重现性好、增强系数高的SERS装置，用于毒死蜱农药超低残留检测。结果表明:硅纳米柱的形貌方面;因此，可以通过调节激光功率密度来调节SERS器件的性能。超低毒死蜱浓度的SERS检测结果重复性好，误差小于5%。高海拔硅纳米柱的毒死蜱增强系数最高(EF = 1.1 × 106)，检出限最低(LOD = 22 × 10−8 M);部分填充三维AuNPs层，并采用500mW/cm2激光功率密度。

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来源期刊

Gold Bulletin Chemistry-Inorganic Chemistry

CiteScore

3.70

自引率

4.50%

发文量

期刊介绍： Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.