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Related Concept Videos

Characteristics of Fluids01:20

Characteristics of Fluids

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When a force is applied parallel to the top surface of a solid, it resists the applied force due to the internal frictional forces between the layers of the solid known as shearing resistance. However, when the force is removed, the shearing forces restore the original shape of the solid. Other deformation forces also cause temporary changes in shape if the forces are not beyond a threshold magnitude. Solids tend to retain their shape, making the study of their rest and motion easier. Beyond...
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Characteristics of Fluids01:31

Characteristics of Fluids

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Fluids differ from solids primarily in their molecular structure and stress response. Solids have tightly packed molecules with strong intermolecular forces, maintaining their shape and resisting deformation. In contrast, fluids have molecules spaced farther apart with weaker forces, allowing them to flow and deform easily.
Fluids, which include both liquids and gases, are substances that deform continuously under shearing stress. For example, water and oil are liquids with molecules that can...
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Surface Tension of Fluid01:22

Surface Tension of Fluid

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Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
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Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

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Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
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Pressure of Fluids01:14

Pressure of Fluids

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There are many examples of pressure in fluids in everyday life, such as in relation to blood (high or low blood pressure) and in relation to weather (high- and low-pressure weather systems). A given force can have a significantly different effect, depending on the area over which the force is exerted. For instance, a force applied to an area of 1 mm2 has a pressure that is 100 times greater than the same force applied to an area of 1 cm2. That's why a sharp needle is able to poke through...
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Fluid Pressure over Flat Plate of Variable Width01:02

Fluid Pressure over Flat Plate of Variable Width

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When a flat plate is submerged in a fluid, the fluid exerts pressure on the plate. This pressure can lead to many different phenomena, including drag and buoyancy. To understand the behavior of the fluid over a flat plate of variable width, it is essential to analyze the distribution of the pressure exerted.
The pressure distribution on the plate can be calculated by determining the force that acts on a differential area strip of the plate. Thus, the magnitude of the force is equal to the...
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Related Experiment Video

Updated: Nov 2, 2025

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
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Particle-laden fluid/fluid interfaces: physico-chemical foundations.

Eduardo Guzmán1,2, Irene Abelenda-Núñez1, Armando Maestro3

  • 1Departamento de Química Física, Universidad Complutense de Madrid, Madrid, Spain.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|June 8, 2021
PubMed
Summary

This review explores how particles stabilize fluid interfaces, crucial for creating Pickering emulsions and advanced devices. Understanding these particle-laden interfaces is key for material science innovation.

Keywords:
colloidsfluid/fluid interfacesinterface-dominated materialsparticles

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Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Interface Science

Background:

  • Particle-laden fluid/fluid interfaces are prevalent in science and industry.
  • Extensive research investigates particle trapping mechanisms and layer properties at interfaces.
  • Understanding these phenomena is vital for developing interface-dominated devices.

Purpose of the Study:

  • To provide a comprehensive overview of the physico-chemical aspects of colloidal particle stabilization of fluid/fluid interfaces.
  • To highlight the application of particle-laden interfaces in stabilizing emulsions and foams.
  • To serve as an introductory resource for researchers and technologists in this field.

Main Methods:

  • Review of existing literature on particle-interface interactions.
  • Analysis of physico-chemical principles governing particle adsorption.
  • Discussion of applications in emulsion and foam stabilization.

Main Results:

  • Detailed examination of the factors influencing particle adsorption and interfacial layer formation.
  • Exploration of how particle properties (e.g., hydrophobicity, size) affect interface stabilization.
  • Overview of the role of particle-laden interfaces in creating stable Pickering emulsions and foams.

Conclusions:

  • Colloidal particles offer versatile routes for stabilizing fluid interfaces.
  • Particle-laden interfaces are fundamental to advanced materials and devices.
  • This review consolidates key knowledge for future research and technological development.