Related Experiment Video
Updated: May 22, 2025
14:42
Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
Published on: April 25, 2020
8.2K
Highly efficient ionic actuators enabled by sliding ring molecule actuation
Chao Lu1, Wei Chen2, Xiaohong Zhang3
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, China. chaolu@suda.edu.cn.
Nature Communications
|March 13, 2025
Summary
Researchers developed highly efficient ionic actuators using a novel polyrotaxane interface. This breakthrough enhances electro-mechanical transduction and energy density, enabling injectable soft actuators for medical applications.
Area of Science:
- Materials Science
- Robotics
- Biomedical Engineering
Background:
- Ionic actuators are crucial for AI and medical devices, but suffer from low efficiency due to poor ion transport at interfaces.
- Limited energy transduction efficiency and density hinder the practical application of current ionic actuators.
Purpose of the Study:
- To develop highly efficient ionic actuators with adjustable ion transport.
- To enhance electro-mechanical transduction efficiency and energy density in ionic actuators.
- To demonstrate the potential of these actuators in biomedical applications, such as injectable soft robots.
Main Methods:
- Fabrication of a novel polyrotaxane interface with adjustable ion transport channels.
- Utilizing the sliding-ring effect within the polyrotaxane structure to control ion flow.
- Characterization of electro-mechanical transduction efficiency and energy density.
- Development and testing of a fiber-shaped, injectable soft actuator.
Main Results:
- The polyrotaxane interface significantly improved ion transport and reduced interfacial energy barriers.
- Achieved significantly enhanced electro-mechanical transduction efficiency compared to conventional actuators.
- The developed actuators demonstrated energy density exceeding that of mammalian skeletal muscle.
- Successfully created an injectable fiber-shaped soft actuator deployable via syringe.
Conclusions:
- The polyrotaxane interface offers a promising strategy for developing highly efficient ionic actuators.
- Injectable soft actuators based on this technology hold significant potential for minimally invasive surgery and physiological monitoring.
- This advancement paves the way for next-generation soft robotics and advanced medical instruments.
Related Concept Videos
01:05Mechanism of Ciliary Motion
3.6K
The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
3.6K
01:39Mechanism of Filopodia Formation
2.3K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
2.3K
01:12Mechanically-gated Ion Channels
6.2K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
6.2K
01:18ATP Synthase: Structure
11.8K
ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
11.8K
02:15The Contractile Ring
6.2K
Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
A small GTPase, RhoA, controls the function and assembly of the contractile ring. RhoA belongs to the Ras superfamily of proteins. The activation of formins by RhoA promotes...
6.2K
01:10The Role of Actin and Myosin in Non-muscle Cells
3.4K
Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They are held...
3.4K