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Related Concept Videos

Surface Tension of Fluid01:22

Surface Tension of Fluid

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 with...
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

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...
Surface Tension and Surface Energy01:16

Surface Tension and Surface Energy

When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Surface Tension01:24

Surface Tension

Surface tension is defined as the force per unit length (γ) acting along the surface of a liquid. It arises due to strong intermolecular forces of attraction. A molecule located inside the bulk of the liquid is surrounded by other molecules and experiences equal forces in all directions. However, a molecule at the surface experiences unbalanced forces because there are more neighboring molecules below than above. This creates a net inward force that pulls surface molecules toward the interior,...
Capillarity in Fluid01:19

Capillarity in Fluid

Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
Characteristics of Fluids01:20

Characteristics of Fluids

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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Updated: May 20, 2026

Fabrication of Nanoheight Channels Incorporating Surface Acoustic Wave Actuation via Lithium Niobate for Acoustic Nanofluidics
07:23

Fabrication of Nanoheight Channels Incorporating Surface Acoustic Wave Actuation via Lithium Niobate for Acoustic Nanofluidics

Published on: February 5, 2020

Nanofluids mediating surface forces.

Georgia A Pilkington1, Wuge H Briscoe

  • 1School of Chemistry, University of Bristol, Bristol, United Kingdom.

Advances in Colloid and Interface Science
|July 17, 2012
PubMed
Summary
This summary is machine-generated.

Nanofluids, fluids with nanostructures, offer tuneable surface forces. Understanding how nanostructure properties affect these forces is crucial but incomplete, requiring further research.

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Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles
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Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles

Published on: March 13, 2016

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Last Updated: May 20, 2026

Fabrication of Nanoheight Channels Incorporating Surface Acoustic Wave Actuation via Lithium Niobate for Acoustic Nanofluidics
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Fabrication of Nanoheight Channels Incorporating Surface Acoustic Wave Actuation via Lithium Niobate for Acoustic Nanofluidics

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Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles
11:13

Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles

Published on: March 13, 2016

Area of Science:

  • Materials Science
  • Colloid and Surface Science

Background:

  • Nanofluids, fluids containing nanostructures, exhibit unique properties compared to base fluids.
  • Nanostructures offer tuneable parameters (size, shape, surface chemistry) for mediating surface forces.
  • Properties like plasmon resonance and magnetism provide novel mechanisms for surface interactions.

Purpose of the Study:

  • To review recent findings on equilibrium and dynamic surface forces in nanofluids.
  • To highlight trends correlating nanofluid physical parameters with mediated surface forces.
  • To identify challenges in understanding nanofluid-mediated surface forces.

Main Methods:

  • Review of experimental and theoretical results on surface forces in nanofluids.
  • Analysis of correlations between nanofluid characteristics and surface force behavior.

Main Results:

  • Nanofluid properties significantly influence equilibrium and dynamic surface forces.
  • Overriding trends exist linking physical parameters to mediated surface forces.
  • Current understanding of these relationships is incomplete.

Conclusions:

  • Nanofluids present a new paradigm for surface force mediation.
  • Further experimental and theoretical work is needed to fully elucidate these complex interactions.
  • Addressing knowledge gaps is essential for advancing nanofluid applications.