About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Recent Developments in Biological, Structural and Functional Thin Films and Coatings
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Presentation Title |
Bi-continuous Pattern Formation in Thin Films via Solid-State Interfacial Dealloying |
Author(s) |
Chonghang Zhao, Kim Kisslinger, Xiaojing Huang, Ming Lu, Fernando Camino, Cheng-Hung Lin, Hanfei Yan, Evgeny Nazaretski, Yong Chu, Bruce Ravel, Mingzhao Liu, Yu-chen Karen Chen-Wiegart |
On-Site Speaker (Planned) |
Chonghang Zhao |
Abstract Scope |
Solid-State Interfacial Dealloying (SSID) creates bi-continuous and large surface porous metal at nano-/meso-scale, offering potential applications such as sensing, energy storage and catalysis. We demonstrated SSID in thin film by dealloying Fe-Ni thin film with Mg film as the dealloying agent. To further understand the kinetics on morphological evolution and to design a SSID system without interaction with substrate for a wider of materials selection, we applied SSID to dealloy Ti-Cu films by Mg film. The systematic study on the influence of dealloying temperature, dealloying time, film thickness, precursor composition, and substrate selection to the morphological evolution will be presented. An etching process to further obtain nanoporous thin films from SSID dealloyed films has also been firstly conducted, with discussion on the potential applications. A multi-scale, multi-modal approach, including advanced synchrotron X-ray nano-tomography and spectroscopy, as well as electron transmission microscopy were applied to provide detailed characterization and mechanistic understanding. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |