On the Origin of the Plasmonic Properties of Gold Nanoparticles,Bulletin of the Korean Chemical Society

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On the Origin of the Plasmonic Properties of Gold Nanoparticles
Bulletin of the Korean Chemical Society ( IF 2.3 ) Pub Date : 2021-06-29 , DOI: 10.1002/bkcs.12349
Seokheon Kim ₁ , Sangwoon Yoon ₁

Affiliation

Gold nanoparticles (AuNPs) are widely used as biological imaging agents, colorimetric sensors, surface-enhanced Raman spectroscopy (SERS) substrates, photothermal anti-cancer agents, visible wavelength photocatalysts, and photovoltaic materials. These applications are based on the plasmonic properties of AuNPs. Therefore, a fundamental understanding of the origin of the plasmonic behavior of AuNPs allows us to control the properties of AuNPs and widen their applications. In this review, we discuss the origin of the color, SERS, and hot-carrier generation of AuNPs. We start with the free-electron Drude model and the dielectric constant of AuNPs, which defines the material properties. We then explain the mechanism that determines the colors of bulk and nanosized gold, enhancement of the electric fields outside the AuNPs, and generation of hot carriers during the decay of plasmons.

中文翻译：

金纳米粒子等离子体性质的起源

金纳米粒子 (AuNPs) 被广泛用作生物成像剂、比色传感器、表面增强拉曼光谱 (SERS) 基板、光热抗癌剂、可见光波长光催化剂和光伏材料。这些应用基于 AuNP 的等离子体特性。因此，对 AuNPs 等离子体行为起源的基本理解使我们能够控制 AuNPs 的特性并扩大其应用范围。在这篇综述中，我们讨论了 AuNPs 的颜色、SERS 和热载流子产生的起源。我们从自由电子 Drude 模型和 AuNP 的介电常数开始，它定义了材料特性。然后我们解释了决定大块金和纳米金颜色的机制，AuNPs 外部电场的增强，

更新日期：2021-08-19

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