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.

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.

Copyright Owner

WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim

Language

en

File Format

application/pdf

Available for download on Thursday, November 19, 2020

Published Version

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