Direct Observation of the Reactivity of Electrons toward Gold Nanoparticles in Aqueous Solution

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-09-18 DOI:10.1021/acs.nanolett.4c03396

Zhiwen Jiang, Mehran Mostafavi

引用次数: 0

Abstract

The catalytic activity of gold nanoparticles (AuNPs) has been widely acknowledged; however, Au NPs are considered to be highly inert as radiosensitizers in biological systems. This apparent discrepancy across different fields complicates the understanding of their interfacial reactivity, particularly in terms of electron transfer reactions. Here, we employ pulse radiolysis to determine the rate constants for the reactions of electrons with AuNPs in aqueous solution. Our investigation of AuNPs with different sizes and surface modifications demonstrates the potential influence of the AuNPs design on electron transfer reactions. These findings address long-standing mechanistic contradictions and underscore the significance of interfacial electron dynamics on AuNPs in both catalytic and biological processes.

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直接观察水溶液中电子与金纳米粒子的反应性

金纳米粒子（AuNPs）的催化活性已得到广泛认可；但在生物系统中，金纳米粒子被认为是高度惰性的辐射敏化剂。这种不同领域的明显差异使人们对其界面反应性的理解变得复杂，尤其是在电子转移反应方面。在这里，我们采用脉冲辐射分析法来确定电子与水溶液中 AuNPs 反应的速率常数。我们对不同尺寸和表面修饰的 AuNPs 进行的研究表明，AuNPs 的设计对电子转移反应具有潜在的影响。这些发现解决了长期存在的机理矛盾，并强调了 AuNPs 上的界面电子动力学在催化和生物过程中的重要意义。

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

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.

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