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The process of a solid dissolving in a liquid to form a solution is governed by the solubility limit, which is the maximum amount of the solid substance, or solute, that can be dissolved in a specific volume of the liquid or solvent. As the solute dissolves, it reaches a point where no more solute can be dissolved at a given temperature - this is known as the saturation point. However, if further solute is added and it manages to dissolve, the solution becomes supersaturated. Supersaturated...
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A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...
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Synthesis of liquid core-shell particles and solid patchy multicomponent particles by shearing liquids into complex

Ian D Tevis1, Lucas B Newcomb, Martin Thuo

  • 1Department of Chemistry, University of Massachusetts-Boston , 100 Morrissey Boulevard, Boston, Massachusetts 02125 United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|November 6, 2014
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Summary

Researchers developed a simple, green, and low-cost method using emulsion shearing to create core-shell and complex-surface micro/nanoparticles from liquid metals. This technique offers tunable control over particle size and morphology.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Particle synthesis often involves complex, costly, or environmentally unfriendly methods.
  • Controlling particle morphology and surface composition is crucial for advanced applications.

Purpose of the Study:

  • To develop a simple, tunable, green, and low-cost method for synthesizing micro- and nanoparticles.
  • To create both core-shell particles and particles with complex surface compositions and morphologies.

Main Methods:

  • Utilizing emulsion shearing with oxidation for core-shell particle synthesis.
  • Employing emulsion shearing with surface-tension driven phase segregation for complex particle synthesis.
  • Applying shear to liquid metals (eutectic gallium-indium, Field's metal) in carrier fluids.

Main Results:

  • Successfully synthesized smooth liquid core-shell particles ranging from 6.4 nm to over 10 μm.
  • Created homogeneous nanoparticles and solid microparticles with varied surface roughness and composition.
  • Demonstrated reconfigurability of liquid particle aggregates using a focused ion beam.

Conclusions:

  • The developed technique, SLICE (Shearing and Liquid-phase Interface Controlled Emulsion), offers a versatile approach to micro- and nanoparticle fabrication.
  • This method provides tunable control over particle characteristics in a cost-effective and environmentally conscious manner.
  • The synthesized particles have potential applications in various fields requiring tailored material properties.