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Mapping the plasmonic response of gold nanoparticles embedded in TiO2 thin films

机译:绘制嵌入TiO2薄膜中的金纳米颗粒的等离子体响应图

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摘要

We present the mapping of the plasmonic properties of gold nanoparticles that are embedded in a TiO2 thin film deposited over two different substrates, glass and silicon. An improved electron energy-loss spectroscopy (EELS) imaging technique was used to extract plasmon maps with nanometre resolution. Several representative cases of randomly dispersed NPs have been examined to carefully evaluate surrounding effects on the optical response of such nanostructured material. Data were compared to analytical calculations and showed good agreement. These results validate previous structural and far-field optical results and provide a clear description of the optical phenomena that take place at a nanometre scale in these materials. They are of primary importance for enlightening the way to the fabrication of thin film materials including metallic nanostructures for photovoltaic applications.
机译:我们介绍了金纳米粒子的等离子特性的映射,该粒子嵌入沉积在两种不同衬底(玻璃和硅)上的TiO2薄膜中。改进的电子能量损失谱(EELS)成像技术用于提取具有纳米分辨率的等离激元图。已研究了随机分散的NP的几种代表性情况,以仔细评估周围环境对此类纳米结构材料的光学响应的​​影响。将数据与分析计算进行比较,并显示出良好的一致性。这些结果验证了先前的结构和远场光学结果,并提供了对这些材料中纳米级发生的光学现象的清晰描述。它们对于启发制造用于光伏应用的包括金属纳米结构的薄膜材料的方式至关重要。

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