阐明银涂层金纳米棒中的等离子体阻尼:单颗粒分析和阻尼调整

IF 1.7 4区 化学 Bulletin of the Korean Chemical Society Pub Date : 2024-08-27 DOI:10.1002/bkcs.12894
Rafifah Hana Raihana Syam, Ji Won Ha
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引用次数: 0

摘要

我们利用扫描电子显微镜(SEM)和暗视野(DF)光谱法展示了通过种子介导生长法合成的银包金纳米棒(AuNRs@Ag)的形态和光谱特性。我们在单颗粒水平上分析了表面阻尼与 AuNRs 中银壳厚度之间的关系。此外,我们还调整了 AuNRs 的体积阻尼和辐射阻尼,以阐明表面阻尼的贡献。扫描电子显微镜图像显示,银沉积后长度和宽度都有所增加。元素图谱分析证实了 AuNR 表面的银沉积,在培养期为 1 天的 AuNR@Ag26.7 中测得的银含量为 26.7%,在培养期为 2 天的 AuNR@Ag34.8 中测得的银含量为 34.8%。DF 光谱显示,它们的 LSPR 光谱出现了明显的蓝移和轻微的增宽。此外,表面阻尼随着银含量的增加而减小。因此,这项研究加深了人们对单个 AuNR@Ag 中等离子体阻尼机制的理解,有助于其潜在应用。
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Elucidating plasmon damping in silver-coated gold nanorods: Single particle analysis and damping adjustment

We demonstrate the morphology and spectral properties of silver-coated gold nanorods (AuNRs@Ag), synthesized via seed-mediated growth, using scanning electron microscopy (SEM) and dark-field (DF) spectroscopy. The relationship between surface damping and the thickness of the Ag shell in AuNRs was analyzed at the single-particle level. Additionally, we adjusted the bulk damping and radiation damping of AuNRs to elucidate the contribution of surface damping. SEM images demonstrated an increase in length and width following Ag deposition. Elemental mapping analysis confirmed the Ag deposition on the AuNR surface, with Ag content measured at 26.7% for AuNR@Ag26.7 with a 1-day incubation period and 34.8% for AuNR@Ag34.8 with a 2-day incubation period. DF spectroscopy revealed a notable blue shift and slight broadening in their LSPR spectra. Moreover, surface damping decreased with an increase in Ag content. Consequently, this study advances the understanding of plasmon damping mechanisms in single AuNR@Ag for their potential applications.

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来源期刊
Bulletin of the Korean Chemical Society
Bulletin of the Korean Chemical Society Chemistry-General Chemistry
自引率
23.50%
发文量
182
期刊介绍: The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.
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