Related Experiment Video
Updated: May 26, 2025

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
Published on: June 9, 2023
Establishing Quantitative Understanding of Defect-Tuned Properties in Functional Oxides by an
Ying Lu1,2, Zihan Xu2, Luhan Wei2
1Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China.
Abstract:
Tuning the physical and chemical properties of functional oxides by controlling the amount of ionic point defects has been recognized as a new paradigm of designing oxides with tailored functionality. In order to enable precise tuning of properties, it is important to construct quantitative relationships between properties of interest and concentration of ionic defects, which are conventionally achieved by synthesizing and measuring a large number of samples with varying defect concentration. Compared with this conventional method, which is labor-intensive and susceptible to sample-to-sample variations, this review focuses on a high-throughput method that utilizes an electrochemically induced gradient of defect concentration in one single oxide sample. Combined with spatially resolved characterizations, this method allows establishing a quantitative property-defect concentration relationship. This review will present working principles and case studies that use this method based on graded concentration of ionic defects. Potentials and future extensions of this method will also be discussed.
Related Concept Videos
What is an Electrochemical Gradient?
The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an...
Electrogravimetric Analysis: Overview
To test the completeness of the...
Controlled-Potential Coulometry: Electrolytic Methods
The chosen potential...
Interfacial Electrochemical Methods: Overview
Ladder Diagrams: Redox Equilibria
Consider the Fe3+/Fe2+ half-reaction, which has a standard-state potential of +0.771 V. At potentials more positive than +0.771 V, Fe3+ predominates, whereas Fe2+...
Electrolysis

