Program
Nanoscience and Microsystems Engineering
College
Arts and Sciences
Student Level
Doctoral
Start Date
7-11-2018 3:00 PM
End Date
7-11-2018 4:00 PM
Abstract
Understanding how the plasmonic response of colloidally grown metallic nanostructures changes when coupled to a metallic film is an important research problem with significant consequences for a number of applications such as sensing, solar energy harvesting, spectroscopy, and photochemistry, to name a few. In this work we investigate, both through experimental and theoretical approaches, the optical response of ligand coated gold nanorods and their interaction with gold films. We find that the scattering response of these systems is dominated by a charge transfer plasmon, in which charge flows between the particle and film. Additionally, we show that the characteristics of this mode are determined by the particle-film junction, making the frequency of the plasmon far less sensitive to the individual nanoparticle geometry. This work serves to advance the fundamental understanding of particle-film interactions, as well as to provide a potential method for building robust plasmonic platforms.
Charge Transfer Plasmon Resonances in Metallic Nanorod-Film Systems
Understanding how the plasmonic response of colloidally grown metallic nanostructures changes when coupled to a metallic film is an important research problem with significant consequences for a number of applications such as sensing, solar energy harvesting, spectroscopy, and photochemistry, to name a few. In this work we investigate, both through experimental and theoretical approaches, the optical response of ligand coated gold nanorods and their interaction with gold films. We find that the scattering response of these systems is dominated by a charge transfer plasmon, in which charge flows between the particle and film. Additionally, we show that the characteristics of this mode are determined by the particle-film junction, making the frequency of the plasmon far less sensitive to the individual nanoparticle geometry. This work serves to advance the fundamental understanding of particle-film interactions, as well as to provide a potential method for building robust plasmonic platforms.
