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Related Concept Videos

Adhesion01:14

Adhesion

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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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Adherens Junctions01:24

Adherens Junctions

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Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
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Cell Adhesion in Plants01:14

Cell Adhesion in Plants

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Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
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Cell Adhesion Molecules - Types and Functions01:20

Cell Adhesion Molecules - Types and Functions

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Cell adhesion molecules (CAMs) are pivotal to multicellularity and the coordinated functioning of tissues and organ systems. They enable physical interactions between cells and provide mechanical strength to tissues. They also function as receptors for signal transmission across the plasma membrane. The CAMs are broadly classified into four families - integrins, cadherins, selectins, and immunoglobulin-like CAMs (IgCAMs).
CAM Families
The Integrin family of proteins is primarily  involved...
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Overview of Cell-Matrix Interactions01:24

Overview of Cell-Matrix Interactions

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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
7.7K
Tension Response at Adherens Junctions01:26

Tension Response at Adherens Junctions

2.9K
The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
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Biomimetic Materials to Characterize Bacteria-host Interactions
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Synergetic adhesion in highly adaptable bio-inspired adhesive.

Muhammad Niaz Khan1, Tingwei Huo1, Qian Zhang1

  • 1College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Colloids and Surfaces. B, Biointerfaces
|January 25, 2022
PubMed
Summary

Researchers developed a novel honeycomb adhesive inspired by octopi suckers. This bio-inspired design uses a partial elastic film to achieve both flexibility and rigidity, creating a stronger, adaptable adhesive through van der Waals and suction forces.

Keywords:
AdaptabilityBio-inspired adhesivesMechanical stabilitySynergetic adhesionWet adhesion

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Area of Science:

  • Materials Science
  • Biomimetics
  • Adhesion Science

Background:

  • Biologically inspired adhesives need both flexibility for surface attachment and rigidity for structural stability.
  • Conflicting requirements pose challenges for synthetic adhesive development and practical applications.

Purpose of the Study:

  • To design and fabricate a novel synthetic adhesive microstructure addressing the flexibility-rigidity conflict.
  • To investigate the adhesive mechanisms, including van der Waals, suction, and capillary forces.

Main Methods:

  • Fabrication of a honeycomb structure with a partially covering soft elastic film (PDMS).
  • Comparative analysis with control microstructures (no film, fully covered film).
  • Experimental testing and theoretical prediction of adhesive forces.

Main Results:

  • The partial-film honeycomb structure demonstrated synergistic adhesive forces (van der Waals and suction).
  • This design provides enhanced adhesion, durability, and surface adaptability compared to controls.
  • Viscous forces and capillary effects were significant in wetting conditions (water, silicon oil).

Conclusions:

  • The developed microstructure effectively balances flexibility and rigidity for strong adhesion.
  • The bio-inspired design, mimicking octopus suckers, enhances adhesive performance.
  • This approach offers a promising pathway for creating advanced, surface-adaptable adhesives.