Materials Science and Engineering, Electrical and Computer Engineering, Microelectronics Research Center (MRC)
Journal or Book Title
Chemistry of Materials
The ability of metal alloys to rapidly oxidize in ambient condition presents both a challenge and an opportunity. Herein, we focus on opportunities buried in the passivating oxide of liquid metal particles. Recently described sub-surface com-plexity and order present an opportunity to frustrate homogeneous nucleation hence enhanced undercooling. Plasticity of the underlying liquid metal surface offers an autonomously repairing sub-surface hence the lowest E0 component domi-nates the surface unless stoichiometrically limited. This plasticity provides an opportunity to synthesize organometallic polymers that in situ self-assemble to high aspect ratio nanomaterials. An induced surface speciation implies that under the appropriate oxidant tension, the oxide thickness and composition can be tuned, leading to temperature-dependent composition inversion and so-called chameleon metals. The uniqueness of demonstrated capabilities points to the need for more exploration in this small but rather complex part of a metal alloy.
American Chemical Society
Martin, Andrew; Du, Chuanshen; Chang, Boyce; and Thuo, Martin M., "Complexity and Opportunities in Liquid Metal Surface Oxides" (2020). Materials Science and Engineering Publications. 387.