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Related Experiment Video

Updated: Jul 11, 2025

A Method to Manipulate Surface Tension of a Liquid Metal via Surface Oxidation and Reduction

A Method to Manipulate Surface Tension of a Liquid Metal via Surface Oxidation and Reduction

Published on: January 26, 2016

Turing Instability of Liquid-Solid Metal Systems.

Zerong Xing^1,2, Genpei Zhang^3,4, Jianye Gao⁵

¹Key Laboratory of Cryogenic Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Advanced Materials (Deerfield Beach, Fla.)

|November 6, 2023

Summary

This summary is machine-generated.

This study reveals a new mechanism for Turing patterns in liquid metal-solid metal systems. Gallium-based liquid metals reacting with solid metals can create complex microstructures like labyrinths and stripes.

Keywords:

Turing instability competitive reactions liquid-solid metal interfaces morphogenesis processes reaction-diffusion systems

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Last Updated: Jul 11, 2025

A Method to Manipulate Surface Tension of a Liquid Metal via Surface Oxidation and Reduction

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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

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Published on: May 15, 2017

Area of Science:

Materials Science
Chemical Engineering
Physical Chemistry

Background:

Classical Turing morphogenesis typically occurs in nonmetallic systems driven by reaction-diffusion.
Liquid metals (LMs), particularly gallium (Ga)-based alloys, offer unique properties like alloying, diffusion, and reactivity with solid metals (SMs).

Purpose of the Study:

To demonstrate Turing instability and pattern formation in liquid metal-solid metal reaction-diffusion systems.
To explore the mechanism of generating nonequilibrium spatial concentration patterns in metallic systems.
To investigate the role of gallium as an inhibitor and other metals as activators in Turing pattern formation.

Main Methods:

Investigated reaction-diffusion dynamics in liquid metal-solid metal systems, using a gallium-indium alloy and silver substrate (GaIn-Ag) as a proof of concept.
Analyzed the conditions for Turing instability, specifically the relative diffusion rates of gallium and the solid metal, and preferential reaction kinetics.
Characterized the resulting Turing patterns, including labyrinths, stripes, and spots, and identified intermetallic compounds formed.

Main Results:

Disclosed a general mechanism for achieving stationary Turing patterns (labyrinths, stripes, spots) in LM-SM reaction-diffusion systems.
Established that Turing instability occurs when Ga diffuses much faster than the solid metal (X) while X reacts preferentially with the substrate (Y).
Identified temperature and concentration as dominant factors tuning the patterning process and clarified the role of intermetallic compounds and competitive reactions.

Conclusions:

The study presents a novel mechanism for Turing instability in metallic systems, expanding the scope beyond nonmetallic solutions.
This liquid metal Turing instability mechanism offers significant opportunities for constructing microstructured systems.
It provides a pathway to experimentally explore general morphogenesis processes using condensed matter.