Blue Shift of Localized Surface Plasmon Resonance of Gold Ultrathin Nanorod by Forming a Single Atomic Silver Shell via Antigalvanic Process

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2024-09-26 DOI:10.1021/acs.nanolett.4c03159

Subarna Maity, Toshiki Komagata, Shinjiro Takano, Shinya Masuda, Jun Kikkawa, Koji Kimoto, Koji Harano, Tatsuya Tsukuda

引用次数: 0

Abstract

Gold ultrathin nanorods (Au UNRs) are anisotropic nanostructures constructed by attaching gold nanoclusters in one dimension. Au UNRs exhibit localized surface plasmon resonance (LSPR) only in the longitudinal direction because their diameter is smaller than the Fermi wavelength of an electron (<2 nm). In this study, we found that the LSPR wavelength of oleylamine-stabilized Au UNRs is blue-shifted simply by mixing with Ag(I). High-resolution elemental mapping and X-ray photoelectron spectroscopy of the resulting UNRs indicate that a Ag monatomic layer is formed on the Au UNR surface by the antigalvanic reduction of Ag(I). This process allowed us to synthesize a series of Au@Ag core–shell UNRs with LSPR wavelengths in the range of 1.2–2.0 μm.

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通过反电过程形成单原子银壳实现金超薄纳米棒局部表面等离子共振的蓝移

金超薄纳米棒（Au UNRs）是一种各向异性的纳米结构，由金纳米团簇在一个维度上连接而成。由于金超薄纳米棒的直径小于电子的费米波长（<2 nm），因此仅在纵向上表现出局部表面等离子体共振（LSPR）。在这项研究中，我们发现油胺稳定的金 UNR 只需与 Ag(I) 混合，其 LSPR 波长就会发生蓝移。所得 UNR 的高分辨率元素图谱和 X 射线光电子能谱显示，Ag（I）的反电还原作用在金 UNR 表面形成了一个 Ag 单原子层。通过这一过程，我们合成了一系列 Au@Ag 核壳 UNR，其 LSPR 波长范围为 1.2-2.0 μm。

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

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.