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Related Concept Videos

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...
Characteristics of Dry Friction01:21

Characteristics of Dry Friction

Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Rolling With Slipping01:14

Rolling With Slipping

Rolling with slipping is a physical phenomenon that occurs when a rolling object experiences both rotational and linear motion but also experiences frictional forces that cause slipping. This phenomenon can occur in various situations, such as when a tire rolls on a wet road or a ball rolls on a rough surface.
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Dry Friction01:30

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Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
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Static and Kinetic Frictional Force01:05

Static and Kinetic Frictional Force

One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
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Consider a truck trying to pull a stationary car. As the truck exerts a force on the car, static friction is created at the point of contact between the two surfaces. This frictional force resists the car's movement and keeps it at rest. However, when the applied force by the truck surpasses the limiting static frictional force, an interesting phenomenon occurs. The frictional force at the interface reduces to a lower value, known as the kinetic frictional force. At this point, the car begins...

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Updated: May 22, 2026

Preparation and High-temperature Anti-adhesion Behavior of a Slippery Surface on Stainless Steel
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Published on: March 29, 2018

How Slippery Surfaces Retain Their Function: Lubricant Film Dynamics Upon Droplet Contact.

Shivam Gupta1, Bidisha Bhatt1, Zhaohe Dai2

  • 1Department of Physics, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India.

Small (Weinheim an Der Bergstrasse, Germany)
|May 21, 2026
PubMed
Summary

Lubricant-infused slippery surfaces show complex film dynamics upon liquid contact. Their equilibrium configuration stabilizes at a nanometer scale, crucial for applications like water harvesting and anti-biofouling.

Keywords:
DW‐RICMcapillarityliquid bridgesslippery lubricated surfacessurface evolverthin‐film dynamics

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Last Updated: May 22, 2026

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Published on: March 29, 2018

Light-induced Patterning and Grafting for Slippery Surfaces based on Silane-coated Nanoporous Structures
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Area of Science:

  • Surface Science
  • Fluid Dynamics
  • Materials Science

Background:

  • Lubricant-infused slippery surfaces offer excellent liquid repellency for diverse applications.
  • The dynamic behavior of lubricant films upon liquid contact is not well understood.
  • Understanding these dynamics is critical for optimizing surface performance.

Purpose of the Study:

  • To investigate the spatio-temporal evolution of lubricant films on slippery surfaces.
  • To numerically determine the equilibrium configurations of these films.
  • To uncover the underlying mechanisms governing lubricant film dynamics.

Main Methods:

  • Application of fluid dynamics, optics, and capillarity principles.
  • Numerical determination of lubricant film equilibrium configurations.
  • Analysis of lubricant film behavior beneath and beyond sessile liquids.

Main Results:

  • Lubricant films exhibit three distinct dynamic stages beneath sessile liquids.
  • Film maxima propagate according to a defined scaling law beyond liquids.
  • Partial lift-off of liquid bridges was observed, driven by a capillary rise-like mechanism.
  • Equilibrium film thickness at the droplet center stabilizes at tens of nanometers, irrespective of initial thickness.

Conclusions:

  • The study provides fundamental insights into the coupled wetting and transport processes.
  • Findings are crucial for understanding the stability and performance of lubricant-infused surfaces.
  • The research elucidates previously unreported phenomena in lubricant film dynamics.