The opto-thermal properties of Au- and Ag-coated core–shell hybrid nanoparticles (NPs) have been thoroughly investigated by using the PyMieLab V1.0 simulation tool based on electrodynamics modelling. We, specifically, investigated the plasmonic resonance tunability and spatial temperature profiles of Au- and Ag-coated composed hybrid core–shell nanospheres as optimized combinations of alloy core (viz. Au_0.25Ag_0.75, Au_0.25Cu_0.75, Au_0.75Al_0.25, Ag_0.75Cu_0.25 and Ag_0.75Al_0.25) immersed in the local water (\(n\)= 1.33) media. In the present core–shell nanostructure configuration, the alloy core radius (\(r\)) has been changed from 5 to 50 nm (with 5-nm step-size) and shell thickness, \(t=5,\mathrm{ and} 10 \mathrm{nm}\) is kept the same with varying core radii. The localized surface plasmon resonance (LSPR) of Au- and Ag-coated optimized alloys composed of hybrid core–shell nanospheres is tuned between 238–545 nm and 347–531 nm, respectively, and lies under the ultraviolet–visible segment of the electromagnetic band. The temperature recorded at the surface of core–shell NPs (i.e. alloy core@gold/silver shell) lies between the range of 0.20 and 2.38 °C (for Au-coated alloys) and 0.64–2.44 °C (for Ag-coated alloy) with different core/shell size ratios. The present results are of paramount importance for using these alloy core–plasmonic shell NPs in several types of thermoplasmonic applications.

Graphical Abstract

中文翻译：

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一些复合金属纳米壳的热等离子应用的光热性能

使用基于电动力学建模的 PyMieLab V1.0 模拟工具对金和银包覆的核壳杂化纳米颗粒 (NP) 的光热特性进行了彻底研究。我们具体研究了金和银涂层混合核壳纳米球的等离激元共振可调性和空间温度分布，作为合金核的优化组合（即 Au 0.25 Ag _0.75、_Au 0.25 _Cu 0.75 _、 Au _0.75 Al _0.25、 Ag _0.75 Cu _0.25和 Ag _0.75 Al _0.25 ) 浸入当地水 ( \(n\) = 1.33) 介质中。在目前的核壳纳米结构配置中，合金核半径（\(r\)）已从5纳米变为50纳米（步长为5纳米），壳厚度为\(t=5,\mathrm{并且} 10 \mathrm{nm}\)在不同的核心半径下保持相同。由混合核壳纳米球组成的金和银涂层优化合金的局域表面等离子体共振（LSPR）分别在 238-545 nm 和 347-531 nm 之间调谐，位于电磁场的紫外-可见光段之下。乐队。核壳纳米颗粒（即合金核@金/银壳）表面记录的温度范围在0.20至2.38°C（对于Au涂层合金）和0.64-2.44°C（对于Ag涂层合金）之间）具有不同的核/壳尺寸比。目前的结果对于在几种类型的热等离激元应用中使用这些合金核-等离激元壳纳米粒子至关重要。

图形概要