Quantitative analysis model based on surface-enhanced Raman spectroscopy of malachite green adsorbed on gold nanoparticles film substrates

IF 2.4 3区化学 Q2 SPECTROSCOPY

Journal of Raman Spectroscopy Pub Date : 2024-05-10 DOI:10.1002/jrs.6678

Hui-Mei Huang, Yu-Bei Zhang, Ting-Wei Weng, He-Tian Qiao, Xiao-Tian Yuan, Zubia Sajid, De-Yin Wu, Zhong-Qun Tian

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Abstract

In order to investigate the adsorption process of malachite green (MG) on gold nanoparticles, a simple gold nanoparticles-assembled film was prepared as a substrate of surface-enhanced Raman spectroscopy (SERS), and it was soaked in MG solutions of different concentrations. The kinetic adsorption process was investigated by SERS method and density functional theoretical calculations. When saturated adsorption was achieved, the relationship between the characteristic SERS band signal intensity and the logarithm of solution concentration of MG was consistent with Temkin adsorption isotherm model, where the R² value was greater than 0.995, and the linear range was 1 × 10⁻³–1 × 10⁻⁷ M. Finally, a SERS quantitative analysis model of the relationship between the adsorption properties of surface species and the bulk concentration was established. According to the electrostatic interaction and co-adsorption, we proposed the surface adsorption configurations and adsorption process of MG on the nanostructured gold films.

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基于表面增强拉曼光谱的孔雀石绿吸附在金纳米颗粒薄膜基底上的定量分析模型

为了研究孔雀石绿（MG）在金纳米粒子上的吸附过程，制备了简单的金纳米粒子组装膜作为表面增强拉曼光谱（SERS）的基底，并将其浸泡在不同浓度的孔雀石绿溶液中。利用 SERS 方法和密度泛函理论计算研究了动力学吸附过程。当达到饱和吸附时，特征 SERS 波段信号强度与 MG 溶液浓度对数之间的关系符合 Temkin 吸附等温线模型，R2 值大于 0.995，线性范围为 1 × 10-3-1 × 10-7 M。根据静电作用和共吸附作用，提出了 MG 在纳米结构金薄膜上的表面吸附构型和吸附过程。

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

Journal of Raman Spectroscopy 物理-光谱学

CiteScore

5.40

自引率

8.00%

发文量

185

审稿时长

3.0 months

期刊介绍： The Journal of Raman Spectroscopy is an international journal dedicated to the publication of original research at the cutting edge of all areas of science and technology related to Raman spectroscopy. The journal seeks to be the central forum for documenting the evolution of the broadly-defined field of Raman spectroscopy that includes an increasing number of rapidly developing techniques and an ever-widening array of interdisciplinary applications. Such topics include time-resolved, coherent and non-linear Raman spectroscopies, nanostructure-based surface-enhanced and tip-enhanced Raman spectroscopies of molecules, resonance Raman to investigate the structure-function relationships and dynamics of biological molecules, linear and nonlinear Raman imaging and microscopy, biomedical applications of Raman, theoretical formalism and advances in quantum computational methodology of all forms of Raman scattering, Raman spectroscopy in archaeology and art, advances in remote Raman sensing and industrial applications, and Raman optical activity of all classes of chiral molecules.