Simulation Analysis of the Transient Absorption Spectroscopic Dynamics of Charge Recombination in a Semiconductor Attached with a Gold Nanoparticle Using Initially Variable Coordinates

IF 0.5 Q4 PHYSICS, MULTIDISCIPLINARY

Optoelectronics Instrumentation and Data Processing Pub Date : 2024-05-02 DOI:10.3103/s8756699024700183

Junli Wang, Akihiro Furube

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Abstract

A Monte Carlo random walk (MCRW) was used to simulate the photocatalytic kinetics of electron diffusion and charge recombination in gold-titanium dioxide (Au/TiO\({}_{2}\)). We designed an MCRW algorithm using MATLAB for one-sided absorption and three-sided reflectance in a rectangle, which conformed to be a good model of photocatalyst nanoparticles (Au/TiO\({}_{2}\)) in ultrafast spectra reported. As the initial point coordinates change, the corresponding absorption histogram and probability density are obtained. From this simulation, we analyzed both the decay of electron particle absorption and the lifetime; namely, the closer the electrons are to the initial coordinates \(x=1\), the faster the corresponding decays are. By means of the fitting curve, we verified that electron diffusion strongly depends on the initial coordinates measured from the TiO\({}_{2}\) nanoparticle interfaces.

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使用初始可变坐标模拟分析附着金纳米粒子的半导体中电荷重组的瞬态吸收光谱动力学

摘要用蒙特卡罗随机游走（MCRW）模拟了二氧化钛金（Au/TiO\({}_{2}\)）中电子扩散和电荷重组的光催化动力学过程。我们利用 MATLAB 设计了一种矩形内单面吸收和三面反射的 MCRW 算法，该算法在报道的超快光谱中符合光催化剂纳米粒子（Au/TiO\({}_{2}\) ）的良好模型。随着初始点坐标的变化，可以得到相应的吸收直方图和概率密度。通过模拟，我们分析了电子粒子吸收的衰减和寿命；即电子越接近初始坐标\(x=1\)，相应的衰减越快。通过拟合曲线，我们验证了电子扩散强烈依赖于从 TiO\({}_{2}\) 纳米粒子界面测得的初始坐标。

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来源期刊

Optoelectronics Instrumentation and Data Processing PHYSICS, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

50.00%

发文量

期刊介绍： The scope of Optoelectronics, Instrumentation and Data Processing encompasses, but is not restricted to, the following areas: analysis and synthesis of signals and images; artificial intelligence methods; automated measurement systems; physicotechnical foundations of micro- and optoelectronics; optical information technologies; systems and components; modelling in physicotechnical research; laser physics applications; computer networks and data transmission systems. The journal publishes original papers, reviews, and short communications in order to provide the widest possible coverage of latest research and development in its chosen field.