Materials Science and Engineering, Center for Bioplastics and Biocomposites
Journal or Book Title
Angewandte Chemie International Edition
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.
WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
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.
Available for download on Thursday, November 19, 2020