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Related Concept Videos

Adhesion01:14

Adhesion

41.9K
Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow...
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Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

30.0K
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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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...
614
Capillarity in Fluid01:19

Capillarity in Fluid

442
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...
442
Rise of Liquid in a Capillary Tube01:18

Rise of Liquid in a Capillary Tube

2.4K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
2.4K
Contact Angle01:13

Contact Angle

16.8K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
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Updated: Oct 1, 2025

Control of Cell Adhesion using Hydrogel Patterning Techniques for Applications in Traction Force Microscopy
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Control of Cell Adhesion using Hydrogel Patterning Techniques for Applications in Traction Force Microscopy

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Bio-inspired adhesion control with liquids.

Yupeng Chen1, Zhongpeng Zhu1, Martin Steinhart2

  • 1Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, P.R. China.

Iscience
|March 4, 2022
PubMed
Summary
This summary is machine-generated.

Researchers explore bio-inspired surfaces for managing wet adhesion, drawing inspiration from nature

Keywords:
BiophysicsEnvironmental science

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Area of Science:

  • Biomimetics and Materials Science
  • Surface Engineering
  • Adhesion Science

Background:

  • Organisms have evolved effective wet adhesive surfaces for attachment.
  • Insects utilize secreted liquids to enhance adhesion on various substrates.
  • Wet adhesion management is crucial for biomedical and robotic applications.

Purpose of the Study:

  • To review challenges in designing bio-inspired wet adhesive systems.
  • To explore strategies for supplying adhesive liquids to surfaces.
  • To propose future directions and a model for wet adhesion management.

Main Methods:

  • Literature review of biological and artificial wet adhesion systems.
  • Analysis of strategies for liquid supply in adhesive interfaces.
  • Conceptualization of a model for wet adhesion management.

Main Results:

  • Identified challenges in understanding and designing wet adhesive systems.
  • Reviewed various strategies for liquid delivery to adhesive surfaces.
  • Proposed a conceptual model for managing wet adhesion.

Conclusions:

  • Bio-inspired wet adhesion management requires addressing liquid supply and surface design.
  • Future research should focus on developing advanced liquid-based adhesion strategies.
  • A proposed model can guide the creation of next-generation bio-inspired adhesives.