Developing EELS Methodologies for the Characterization of Next-Generation Plasmonic Materials

Localized surface plasmon resonance underpins numerous applications, including plasmonic sensing, energy conversion, and cancer therapy. However, understanding how structural and compositional factors govern plasmonic resonances in increasingly complex sample architectures is challenging. Electron energy loss spectroscopy (EELS) in transmission electron microscopy (TEM) is a powerful method for probing electronic characteristics of plasmonic materials at the nanoscale, but it is often limited by two main challenges: (1) achieving sufficient energy resolution to observe low-energy resonances, and (2) incompatibility with air- and electron-beam-sensitive nanoparticles. This project proposes advanced 2D/3D EELS techniques that preserve both spatial and energy resolution while minimizing sample degradation. The University of Cambridge provides an ideal environment for this work, with extensive experience in 2D/3D EELS imaging and access to a world leading monochromated TEM with an inert-transfer cryo holder. This world-class platform is perfectly suited for investigating the geometric and compositional heterogeneity influences on the plasmonic behavior of novel ambient/e-beam unstable plasmonic group IV nitride (TiN, ZrN) and their hetero-nanostructure (TiN@porous SiO2). The developed methodology will enable comprehensive sub-nanometer characterization, providing unprecedented insights into structure-plasmonic property relationships.

Faculty Supervisor:

Audrey Moores

Student:

Partner:

University of Cambridge

Discipline:

Engineering

Sector:

Education

University:

McGill University

Program: