| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Oxide Nucleation and Growth during In Situ Oxidation of Cu and Cu Alloys |
| Author(s) |
Judith Yang |
| On-Site Speaker (Planned) |
Judith Yang |
| Abstract Scope |
Fundamental understanding of oxidation of metals and alloys is critical for corrosion protection, catalyst design and nano-oxide synthesis. However, the transient stages of oxidation - from the nucleation of the metal oxide to the formation of the thermodynamically stable oxide - represent a scientifically challenging and technologically important terra incognito. These issues can only be understood through detailed study of the relevant microscopic processes at the atomic scale in situ. We have previously demonstrated via in situ TEM that the formation of epitaxial Cu2O islands during the transient oxidation of Cu thin films bear a striking resemblance to heteroepitaxy, where the initial stages of growth are dominated by oxygen surface diffusion. We are now correlating in situ Environmental High-Resolution TEM (HREM) with atomistic simulations to understand the atomic-scale surface dynamics of oxide nucleation and growth. We will also investigate binary alloy, Cu-Ni, for essential insights into selective oxidation. |