Mon 27 Mar
Seminars and Conferences

Plasmonic Hot Spot Modulation through Morphology Tuning and Interface

Plasmonic nanomaterials can be employed in a wide range of applications, including, among others, sensors, diagnostic platforms, and optical devices. One of the most important properties of these nanomaterials is their ability to generate hot spots upon interaction with impinging radiation. At these locations the scattered electric field reaches its highest levels and energetic hot electrons can be generated and extracted. The enhancement of the scattered electric field is a fundamental process at the basis, for instance, of surface enhanced Raman scattering and surface enhanced fluorescence effects, while the generated hot electrons are implied in several technologies, among which photocatalysis. To fully benefit from these phenomena, however, it is fundamental to establish and realize very specific materials design rules, which hinge, in particular, on morphology tuning and interface engineering.

In this talk, it will be discuss how it was possible to approach hot spot optimization by devising new colloidal methods for the synthesis of plasmonic nanostructures and by studying the interfacial properties of these nanostructures in detail in various environments. It will be reported how computational and experimental approaches have been holistically integrated to understand the properties of the systems under investigation, and some case studies will be presented where fundamental discoveries have led to real applicability.

Speaker: Professor Laura Fabris, Department of Applied Science and Technology - DISAT of the Politecnico.