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

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters 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

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引用次数: 0

摘要

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。

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

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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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.