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The Atomic Circus: Small Electron Beams Spotlight Advanced Materials Down to the Atomic Scale
Haijun Wu1, Xiaoxu Zhao1,2, Cao Guan1
1Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, 117574, Singapore.
Advanced Materials (Deerfield Beach, Fla.)
|October 12, 2018
Summary
Defect engineering in crystalline materials, visualized with advanced electron microscopy, enables tuning of physical properties. Understanding atomic-scale defects is key to designing new functional materials.
Area of Science:
- Materials Science
- Solid State Physics
- Nanotechnology
Background:
- Crystal defects significantly influence material properties.
- Controlling defects can enhance physical, electrical, magnetic, and optical characteristics.
- Atomic-scale defect understanding is crucial for structure-property relationships.
Purpose of the Study:
- To demonstrate how advanced microscopy visualizes defects.
- To highlight defect engineering for improved material functionality.
- To showcase insights from diverse functional materials.
Main Methods:
- Aberration-corrected scanning transmission electron microscopy (STEM/TEM).
- Direct visualization of defects across multiple length scales.
- Analysis of defect nature and dynamics.
Main Results:
- Enabled atomic-scale defect visualization.
- Provided insights into defect-property links.
- Showcased applications in piezoelectrics, oxide interfaces, thermoelectrics, electrocatalysts, and 2D materials.
Conclusions:
- Advanced electron microscopy is vital for defect characterization.
- Defect engineering offers a pathway to tailored material properties.
- Fundamental understanding of defects drives innovation in functional materials.
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