Functional Ceramics and Structural Dynamics

Functional oxides are critical to many technological applications such as catalysis, fuel cells, quantum information, microelectronics etc. Non-stoichiometric oxides are particularly interesting because the concentration, transport and exchange of oxygen vacancies is of critical for functionality.  We are investigating how these point defects behave under a variety of different conditions to understand how useful functionalities emerge.

Recent Publications:

  1. Atomic Level Strain Induced by Static and Dynamic Oxygen Vacancies on Reducible Oxide Surfaces, arXiv preprint arXiv:2210.01764, 2022
  2. Atomic Scale Characterization of Fluxional Cation Behavior on Nanoparticle Surfaces: Probing Oxygen Vacancy Creation/Annihilation at Surface Sites, ACS Nano, 2021
  3. Impact of Aliovalent Alkaline-Earth metal solutes on Ceria Grain Boundaries: A density functional theory study, Acta Materialia, 2021
  4. Approaches to Exploring Spatio-Temporal Surface Dynamics in Nanoparticles with In Situ Transmission Electron Microscopy, Microscopy and Microanalysis, 2020 
  5. Tracking the picoscale spatial motion of atomic columns during dynamic structural change, Ultramicroscopy, 2020
  6. Linking Macroscopic and Nanoscopic Ionic Conductivity: A Semiempirical Framework for Characterizing Grain Boundary Conductivity in Polycrystalline Ceramics, ACS Applied Materials and Interfaces, 2020
  7. New Data-Driven Interacting-Defect Model Describing Nanoscopic Grain Boundary Compositions in Ceramics, The Journal of Physical Chemistry C, 2020
  8. Oxygen Transfer at Metal-Reducible Oxide Nanocatalyst Interfaces: Contrasting Carbon Growth from Ethane and Ethylene, ACS Applied Nano Materials, 2018
  9. Enhanced ionic conductivity in electroceramics by nanoscale enrichment of grain boundaries with high solute concentration, Nanoscale, 2017
  10. Electrical conductivity and grain boundary composition of Gd-doped and Gd/Pr co-doped ceria, Solid State Ionics, 2015