Title
Chameleon Metals: Autonomous Nano‐Texturing and Composition Inversion on Liquid Metals Surfaces
Campus Units
Materials Science and Engineering, Center for Bioplastics and Biocomposites
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
11-19-2019
Journal or Book Title
Angewandte Chemie International Edition
DOI
10.1002/anie.201912639
Abstract
Studies on passivating oxides on liquid metals are challenging, in part, due to plasticity, entropic, and technological limitations. In alloys, compositional complexity in the passivating oxide(s) and underlying metal interface exacerbates these challenges. This nanoscale complexity, however, offers an opportunity to engineer the surface of the liquid metal under felicitous choice of processing conditions. We inferred that difference in reactivity, coupled with inherent interface ordering, presages exploitable order and selectivity to autonomously present compositionally biased oxides on the surface of these metals. Besides the compositional differences, sequential release of biased (enriched) components, via fractal‐like paths, allows for patterned layered surface structures. We, therefore, present a simple thermal‐oxidative compositional inversion (TOCI) method to introduce fractal‐like structures on the surface of these metals in a controlled (tier, composition, and structure) manner by exploiting underlying stochastic fracturing process. Using a ternary alloy, a three‐tiered (in structure and composition) surface structure is demonstrated.
Copyright Owner
WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
Copyright Date
2019
Language
en
File Format
application/pdf
Recommended Citation
Martin, Andrew; Kiarie, Winnie; Chang, Boyce; and Thuo, Martin, "Chameleon Metals: Autonomous Nano‐Texturing and Composition Inversion on Liquid Metals Surfaces" (2019). Materials Science and Engineering Publications. 359.
https://lib.dr.iastate.edu/mse_pubs/359
Comments
This is the peer-reviewed version of the following article: Martin, Andrew, Winnie Kiarie, Boyce Chang, and Martin M. Thuo. "Chameleon Metals: Autonomous Nano‐Texturing and Composition Inversion on Liquid Metals Surfaces." Angewandte Chemie International Edition (2019), which has been published in final form at DOI: 10.1002/anie.201912639. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Posted with permission.