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Complex Concentrated Oxides by APT – Application note

Friday, October 3, 2025

We are excited to announce a new application note developed in collaboration with UC Irvine, Northwestern University, and UC Riverside, showcasing how Atom Probe Tomography (APT) enables unprecedented 3D visualization of self-assembled nanostructures in complex concentrated oxides.

Why Complex Concentrated Oxides Matter

Complex concentrated oxide composites, stabilized by multiple metal cations, offer promising properties for catalysis, electrochemical systems, and energy applications. However, their performance is tightly linked to their 3D nanostructure, which is often difficult to characterize with conventional techniques.

APT Reveals Core–Shell Nanoparticle Architecture

Using pulsed laser deposition and controlled oxygen stoichiometry, researchers achieved exsolution-driven self-assembly of Pd–NixCo₁₋ₓO core–shell nanoparticles in LaFe₀.₇Ni₀.₁Co₀.₁Pd₀.₀₅Ru₀.₀₅O₃₋δ thin films. APT provided:
  • Sub-nanometer resolution of core–shell structures
  • Identification of percolating Co/Ni-rich channels
  • Precise chemical mapping of Ni₀.₆₃Co₀.₃₇O shells
  • Detection of secondary phases like La₂O₃

    Complementing STEM with APT for Advanced Materials Characterization

    APT not only confirmed features observed in HAADF-STEM but also extended the interpretation by revealing 3D connectivity and chemical gradients. This synergy between APT and STEM is essential for understanding and optimizing high-entropy oxide systems.

    Explore the full findings and learn how APT can enhance your materials research: download the application note     Complex Concentrated Oxides by APT - Visualizing Self-Assembled Core–Shell Nanostructures!


    READ NOW