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Oxidation-Induced Oxide Shell Rupture and Phase Separation in Eutectic Gallium-Indium Nanoparticles

  • 0Department of Mechanical Engineering & Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, New York 13902, United States.
Acs Nano +

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August 27, 2024

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August 27, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Oxidation of eutectic gallium-indium (EGaIn) nanoparticles causes shell rupture, leading to self-similar replication and pulverization. This reveals new pathways for reconfiguring liquid metal nanoparticles.

Area Of Science

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background

  • Eutectic gallium-indium (EGaIn) is a liquid metal with applications in soft electronics, energy, and drug delivery.
  • A native oxide shell forms on EGaIn, influencing its properties and applications.
  • Understanding EGaIn oxidation is crucial for controlling its behavior and applications.

Purpose Of The Study

  • To investigate the <i>in situ</i> oxidation mechanisms of EGaIn nanoparticles under electron beam irradiation.
  • To elucidate the role of the oxide shell in the structural evolution of EGaIn nanoparticles.
  • To explore the implications of oxidation-induced reconfiguration for EGaIn applications.

Main Methods

  • Environmental scanning transmission electron microscopy (ES-STEM) for <i>in situ</i> observation.
  • High-energy electron beam irradiation to induce oxidation.
  • Analysis of oxide shell growth, stress dynamics, and liquid metal core behavior.

Main Results

  • Uneven oxide shell growth leads to unbalanced stresses and shell rupture.
  • Shell rupture allows liquid metal core extrusion, initiating self-similar replication and particle breakdown.
  • Internal oxidation induces phase separation and pulverization of the liquid metal into indium-rich solid particles.

Conclusions

  • Oxidation of EGaIn nanoparticles is a dynamic process involving shell rupture and self-replication.
  • Mechanistic insights into EGaIn oxidation enable controlled reconfiguration of nanoparticles.
  • This study provides a foundation for advanced applications of liquid metals in nanotechnology and materials science.

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