Optical Properties and Excited-State Dynamics of Atomically Precise Gold Nanoclusters.

IF 11.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Annual review of physical chemistry Pub Date : 2021-04-20 Epub Date: 2020-12-09 DOI:10.1146/annurev-physchem-090419-104921

Meng Zhou, Rongchao Jin

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引用次数: 27

Abstract

Understanding the excited-state dynamics of nanomaterials is essential to their applications in photoenergy storage and conversion. This review summarizes recent progress in the excited-state dynamics of atomically precise gold (Au) nanoclusters (NCs). We first discuss the electronic structure and typical relaxation pathways of Au NCs from subpicoseconds to microseconds. Unlike plasmonic Au nanoparticles, in which collective electron excitation dominates, Au NCs show single-electron transitions and molecule-like exciton dynamics. The size-, shape-, structure-, and composition-dependent dynamics in Au NCs are further discussed in detail. For small-sized Au NCs, strong quantum confinement effects give rise to relaxation dynamics that is significantly dependent on atomic packing, shape, and heteroatom doping. For relatively larger-sized Au NCs, strong size dependence can be observed in exciton and electron dynamics. We also discuss the origin of coherent oscillations and their roles in excited-state relaxation. Finally, we provide our perspective on future directions in this area.

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原子精密金纳米团簇的光学性质和激发态动力学。

了解纳米材料的激发态动力学对其在光能存储和转换中的应用至关重要。本文综述了原子精密金纳米团簇激发态动力学研究的最新进展。我们首先讨论了Au纳米粒子从亚皮秒到微秒的电子结构和典型弛豫路径。与集体电子激发占主导地位的等离子体金纳米粒子不同，金纳米粒子表现出单电子跃迁和分子样激子动力学。进一步详细讨论了Au纳米材料的尺寸、形状、结构和组分依赖动力学。对于小尺寸的Au NCs，强量子约束效应会产生弛豫动力学，这在很大程度上取决于原子填充、形状和杂原子掺杂。对于相对较大尺寸的金纳米粒子，在激子和电子动力学中可以观察到强烈的尺寸依赖性。我们还讨论了相干振荡的起源及其在激发态弛豫中的作用。最后，提出了对该领域未来发展方向的展望。

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

Annual review of physical chemistry 化学-物理化学

CiteScore

28.00

自引率

0.00%

发文量

期刊介绍： The Annual Review of Physical Chemistry has been published since 1950 and is a comprehensive resource for significant advancements in the field. It encompasses various sub-disciplines such as biophysical chemistry, chemical kinetics, colloids, electrochemistry, geochemistry and cosmochemistry, chemistry of the atmosphere and climate, laser chemistry and ultrafast processes, the liquid state, magnetic resonance, physical organic chemistry, polymers and macromolecules, and others.