About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
High Temperature Oxidation of Metals and Ceramics
|
Presentation Title |
Atomic Scale Dynamics of Initial Stage Copper Oxidation Using In Situ ETEM and Correlated DFT Simulations |
Author(s) |
Meng Li, Matthew T Curnan, Richard Burke Garza, Stephen D House, Wissam A Saidi, Judith C Yang |
On-Site Speaker (Planned) |
Meng Li |
Abstract Scope |
The initial stage of metal oxidation is essential for rational design and control of oxides for applications in catalysts, sensors, and corrosion. Despite ample research on bulk oxidation, little is known on the initial oxidation process. In this work, we use correlated in situ Environmental TEM, DFT simulation, quantitative data extraction and statistical analysis to investigate the dynamic atomic process of initial oxidation from surface reconstruction to oxide growth. Uneven oxidation is observed on stepped Cu surface during surface reconstruction[1]. Epitaxial Cu2O islands on Cu(100) were observed to grow via an unusual layer-by-layer growth mechanism along Cu2O(110)[2]. Correlated DFT simulations and advanced data analysis were performed to uncover the mechanism beneath the observed phenomena. Our results shed new lights on surface oxidation investigation at atomic scale.
[1] Li, M. et al. Nano Lett. 22, 1075–1082 (2022).
[2] Li, M. et al. Nat. Commun. 12, 2781 (2021). |