Plasmon-Driven Chemical Reaction and Characterization

在金属纳米粒子中，局域表面等离子体激元在光照下被激发，使入射电磁场集中在纳米粒子表面，有效地对应于光的限制远远超过经典的衍射极限。该项目的目的是利用等离子体激元驱动的效应，以便：i)局部促进化学反应，提高微/纳米尺度的反应速率和产物选择性；ii)通过实现高灵敏度和高分辨率，特别是在拉曼光谱中，局部增强电场。第二种方法将应用于新型二维(2D)材料的表征，这些材料具有与石墨烯的互补性质。学生将通过多种方法制备具有金属纳米结构的衬底，并将在从有机分子到聚合物和2D材料的不同系统上进行结晶实验和拉曼测量。最终目标是利用等离子体驱动效应实现纳米级有序或性质可控的结构，并以纳米级分辨率表征新的2D材料。

In metallic nanoparticles, localized surface plasmon polaritons are excited under illumination, with the effect of concentrating the incident electromagnetic field at the nanoparticle surface, effectively corresponding to a confinement of light well beyond the classic diffraction limit. The aims of this project are to exploit plasmon-driven effects in order to: i) locally promote chemical reactions, enhancing reaction rates and product selectivity at the micro/nanoscale; ii) to locally enhance the electric field by enabling to achieve high sensitivity and resolution in particular in Raman spectroscopy. This second methodology will be applied for the characterization of novel 2-dimensional (2D) materials, which have complementary properties to those of graphene.The student will produce substrates with metallic nanostructures in several ways and will conduct crystallization experiments as well as Raman measurements on different systems, from organic molecules to polymers and 2D materials.The final goal is to use plasmonic-driven effects to realize structures with controlled order or properties at the nanoscale and to characterize new 2D materials with nanoscale resolution.