Publications by authors named "Dongchang Wu"
Article Synopsis
- This study focuses on the role of intermetallic phases in catalysts, specifically examining the phase transitions and atomic diffusion in Pd@Pt-Co cubic nanoparticles during heating.
- Using advanced microscopy techniques, researchers found that as Pd atoms diffuse outward, they partially replace Pt in the surface, creating a new (Pt, Pd)-Co system which enables phase transitions at lower temperatures (400°C).
- At higher temperatures, excessive diffusion alters the material's composition and results in decreased atomic ordering and changes in shape, highlighting how understanding these processes can aid in designing better multi-component catalyst systems.
Scanning transmission electron microscopy (STEM) is a powerful imaging technique and has been widely used in current material science research. The attempts of applying STEM (annual dark field (ADF)-STEM or annular bright field (ABF)-STEM) into biological research have been going on for decades while applications have still been limited because of the existing bottlenecks in dose efficiency and non-linearity in contrast. Recently, integrated differential phase contrast (iDPC) STEM technique emerged and achieved a linear phase contrast imaging condition, while resolving signals of light elements next to heavy ones even at low electron dose.
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