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Related Concept Videos

Adhesion01:14

Adhesion

44.5K
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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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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Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

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Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
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Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
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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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Laminins are the Adhesive Proteins of Basal Lamina00:55

Laminins are the Adhesive Proteins of Basal Lamina

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Laminins are heterotrimeric proteins with high molecular mass found in the extracellular matrix. Each laminin molecule is composed of three chains, viz. alpha, beta, and gamma, coded by five, four, and three paralogous genes, respectively. Laminins are categories based on the compositions of the three chains.
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
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Rapid Manufacturing of Thin Soft Pneumatic Actuators and Robots
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Switchable Adhesion Actuator for Amphibious Climbing Soft Robot.

Yichao Tang1, Qiuting Zhang1, Gaojian Lin1

  • 1Applied Mechanics of Materials Laboratory, Department of Mechanical Engineering, Temple University , Philadelphia, Pennsylvania.

Soft Robotics
|June 30, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a novel amphibious climbing soft robot (ACSR) with a unique pneumatic adhesion actuator. This soft robot demonstrates robust climbing on diverse surfaces, both on land and underwater, carrying significant loads.

Keywords:
amphibious climbing soft roboticsload-carrying soft robotspneumatic actuationswitchable adhesionunderwater locomotion

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Area of Science:

  • Robotics
  • Materials Science
  • Biomimetics

Background:

  • Climbing soft robots offer potential for surveillance, inspection, and maintenance in challenging environments.
  • A key challenge is developing fast, robust, and switchable adhesion mechanisms for vertical surfaces.
  • Existing adhesion actuators often rely on rigid materials and traditional suction methods.

Purpose of the Study:

  • To design and develop a novel pneumatic-actuated soft adhesion actuator for amphibious climbing robots.
  • To create a load-carrying amphibious climbing soft robot (ACSR) capable of operating on diverse surfaces.
  • To characterize the adhesion performance and climbing capabilities of the developed soft robot.

Main Methods:

  • Fabrication of a soft adhesion actuator using bilayer structures with an embedded spiral pneumatic channel.
  • Utilizing pneumatic inflation to deform the actuator into a 3D dome, creating negative pressure for adhesion.
  • Integration of the adhesion actuator with a soft bending actuator to form the amphibious climbing soft robot (ACSR).

Main Results:

  • The soft adhesion actuator demonstrated strong, rapid, and reversible adhesion on various smooth and semi-smooth surfaces.
  • The ACSR successfully operated on dry, wet, slippery, smooth, and semi-smooth surfaces, both on ground and underwater.
  • The robot achieved a vertical climbing speed of 286 mm/min while carrying over 200g (5x its own weight).

Conclusions:

  • The proposed pneumatic-actuated soft adhesion actuator is effective for amphibious climbing applications.
  • The developed ACSR exhibits significant load-carrying capacity and versatility across different environments.
  • This research advances soft robot capabilities for tasks like window cleaning and underwater inspection in harsh conditions.