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Related Concept Videos

The Fluid Mosaic Model01:34

The Fluid Mosaic Model

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The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
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Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
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Related Experiment Video

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Double Emulsion Generation Using a Polydimethylsiloxane PDMS Co-axial Flow Focus Device
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Dynamically Reconfigurable, Multifunctional Emulsions with Controllable Structure and Movement.

Kang Hee Ku1,2, Jie Li1, Kosuke Yoshinaga1

  • 1Department of Chemistry, Massachusetts Institute of Technology (MIT), Cambridge, MA, 02139, USA.

Advanced Materials (Deerfield Beach, Fla.)
|October 23, 2019
PubMed
Summary
This summary is machine-generated.

Researchers created reconfigurable oil-in-water Pickering emulsions using platinum and iron nanoparticles. These dynamic emulsions offer controllable shapes and advanced applications in catalysis, magnetism, and smart delivery systems.

Keywords:
Pickering emulsionsmagnetic emulsionsmetal-coated microcapsulesparticle assemblyshape-reconfigurable emulsions

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry
  • Nanotechnology

Background:

  • Pickering emulsions are stabilized by solid particles, offering unique properties.
  • Controlling emulsion morphology and particle assembly is crucial for advanced applications.
  • Dynamic reconfiguration of emulsions remains a significant challenge.

Purpose of the Study:

  • To develop dynamically reconfigurable oil-in-water (o/w) Pickering emulsions.
  • To control particle assembly and emulsion morphology using interfacial tension.
  • To demonstrate catalytic and magnetic applications of functionalized Pickering emulsions.

Main Methods:

  • Utilizing platinum-on-carbon and iron-on-carbon nanoparticles for emulsion stabilization.
  • Exploiting temperature-sensitive liquid miscibility for single-step emulsion synthesis.
  • Employing dynamic adsorption/desorption of surfactants for shape and configuration transitions.
  • Investigating bimetallic microcapsules and magnetic emulsion dynamics.

Main Results:

  • Achieved dynamically reconfigurable o/w Pickering emulsions with tunable particle distribution.
  • Demonstrated single-step synthesis of complex emulsions with controllable morphologies.
  • Transformed core/shell structures into Janus configurations via surfactant dynamics.
  • Showcased catalytic activity and magnetic manipulation of the developed emulsions.

Conclusions:

  • The developed Pickering emulsions offer dynamic reconfigurability and controlled morphology.
  • Functionalized nanoparticles enable versatile applications in catalysis, sensing, and payload delivery.
  • This work provides a platform for designing advanced, responsive soft materials.