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Related Concept Videos

Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

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Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
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Updated: Jul 3, 2025

A Real-Time Wearable Electromyography Measurement System for Small Animals
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A dynamically stable self-healable wire based on mechanical-electrical coupling.

Shuo Wang1, Zhaofeng Ouyang1, Shitao Geng1

  • 1Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Zhangjiang Institute for Advanced Study, and Key Laboratory of Green and High-End Utilization of Salt Lake Resources (Chinese Academy of Sciences), Shanghai Jiao Tong University, Shanghai 200240, China.

National Science Review
|February 12, 2024
PubMed
Summary
This summary is machine-generated.

New self-healable wires maintain stable electrical conductivity under dynamic conditions, overcoming limitations in wearable electronics. This breakthrough enhances device precision for applications like health monitoring, even with tremors.

Keywords:
fiber deviceinterfacial chemistrymechanical–electrical couplingpolymer materialsself-healable wire

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Area of Science:

  • Materials Science
  • Wearable Electronics
  • Biomedical Engineering

Background:

  • Wearable electronics require self-healable wires that can recover mechanical and electrical properties after damage.
  • Existing self-healable wires exhibit fluctuating electrical resistance under dynamic conditions (bending, stretching, tremors), compromising device precision and hindering applications.
  • The myelinated axon in nature demonstrates mechanical-electrical coupling, offering a potential model for improved stability.

Purpose of the Study:

  • To develop a new family of self-healable wires with high strength and stable electrical conductivity under dynamic conditions.
  • To address the limitations of fluctuating resistance in current self-healable wires for wearable technology.
  • To enable precise monitoring capabilities in wearable devices, even in the presence of physical disturbances.

Main Methods:

  • Inspired by the mechanical-electrical coupling observed in natural myelinated axons.
  • Engineered self-healable wires utilizing a mechanical-electrical coupling strategy between structural and conductive components.
  • Tested electrical stability under various dynamic conditions, including simulated limb tremors.

Main Results:

  • Developed self-healable wires exhibiting high strength and significantly improved electrical stability under dynamic scenarios.
  • Demonstrated the capability of the wires for precise monitoring of human health status and daily activities.
  • Successfully enabled reliable monitoring even with simulated limb tremors, mimicking conditions like Parkinson's disease.

Conclusions:

  • The novel mechanical-electrical coupling strategy effectively enhances the electrical stability of self-healable wires under dynamic conditions.
  • This approach overcomes a critical barrier for the real-world application of self-healable wires in wearable electronics.
  • The developed wires pave the way for more robust and reliable dynamically stable electrodes and devices for advanced wearable applications.