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Investigation of the structure-function relation of plasmonic nanoparticles with combined theory and experiment

理论与实验相结合研究等离子体纳米粒子的结构与功能关系

基本信息

批准号：
2110054
负责人：
金额：
--
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2110054
关键词：
Investigation structure function relation plasmonic

项目摘要

Plasmonics is a developing field enclosing many challenges both in theoretical background and in potential applications, which range from sensors and photocatalysis to biomedical applications. These enhanced interactions occurring between metal nanoparticles and light are of particular interest as they could be used to harvest solar energy, towards sun-driven catalysis.In this project, plasmonic nanoparticles of Au, Ag, and Mg will be synthesized. Some of these are routine syntheses that will be used as templates for more complex structures, while some, e.g. Mg, are novel syntheses that need careful testing and optimization. The light-matter interactions created by these particles will be investigated first optically using hyperspectral dark field spectroscopy, then in the near-field using electron-energy loss spectroscopy. These results will be correlated with electron microscopy and spectroscopy, which will unravel the nanoparticle's size, shape, and composition. Experimental data will be compared and further analysed with suitably tailored numerical techniques (BEM) to extract information such as near-field properties and mode symmetry.This research will help better understand the structure-property relation of plasmonic nanoparticles, towards tunable plasmonics for enhanced photocatalysis.

等离子体激元是一个发展中的领域，从传感器、光催化到生物医学应用，在理论背景和潜在应用方面都面临着许多挑战。金属纳米粒子与光之间的这种增强的相互作用引起了人们的特别兴趣，因为它们可以用来获取太阳能，走向太阳驱动的催化剂。在这个项目中，我们将合成Au，Ag和Mg的等离子体纳米粒子。其中一些是常规合成，将被用作更复杂结构的模板，而另一些，例如镁，是需要仔细测试和优化的新型合成。这些粒子产生的光-物质相互作用将首先使用高光谱暗场光谱进行光学研究，然后在近场使用电子能量损失光谱进行研究。这些结果将与电子显微镜和光谱学相关联，这将揭开纳米颗粒的大小、形状和组成。实验数据将通过适当定制的数值技术(BEM)进行比较和进一步分析，以提取近场性质和模式对称性等信息。这一研究将有助于更好地理解等离子体纳米粒子的结构-性质关系，以用于增强光催化的可调谐等离子体。