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Related Concept Videos

Electromotive Force01:02

Electromotive Force

Electromotive force (emf) is the force that causes current to flow from a higher to a lower  potential. The term "electromotive force" is used for historical reasons, even though emf is not a force at all.
Any circuit with a constant current must contain an emf-producing source. Examples of emf sources include batteries, electric generators, solar cells, thermocouples, and fuel cells. All these sources transform energy of some kind (mechanical, chemical, thermal, and so on) into electric...
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Energy In A Magnetic Field01:24

Energy In A Magnetic Field

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DC Battery01:21

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A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
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Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
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Fabrication Process of Silicone-based Dielectric Elastomer Actuators
10:32

Fabrication Process of Silicone-based Dielectric Elastomer Actuators

Published on: February 1, 2016

33.6K

Electrically weldable conductive elastomers.

Haimen Lin1, Dandan Zheng1, Xiaoling Wu1

  • 1College of Materials, Xiamen University, Xiamen 361005, China.

Science Advances
|June 19, 2024
PubMed
Summary
This summary is machine-generated.

A novel electric welding technique uses conductive elastomers to rapidly join rigid and soft components in flexible electronics. This method enhances circuit reliability and allows for on-demand assembly of stretchable devices.

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Polymer Science

Background:

  • Flexible and stretchable electronics often fail due to unreliable circuit interconnections.
  • Integrating diverse materials like rigid components, soft sensors, and conductive elastomers presents significant challenges.

Purpose of the Study:

  • To develop a low-voltage, rapid electric welding strategy for robust integration of components in flexible electronic devices.
  • To create conductive elastomers capable of self-welding and bonding to various materials under ambient conditions.

Main Methods:

  • Designed conductive elastomers using borate ester polymers and conductive fillers.
  • Implemented a low-voltage (1.5–4.5 V), rapid (as low as 5 s) electric welding process.
  • Investigated welding mechanisms involving electrochemical reactions, adhesive promotors, and dynamic bond reformation.

Main Results:

  • Achieved reliable welding of metals, hydrogels, and conductive elastomers.
  • Ensured both mechanical compliance and electrical conductivity at circuit interfaces.
  • Demonstrated welding strengths in the kilopascal to megapascal range.

Conclusions:

  • The developed electric welding strategy provides a robust platform for flexible and stretchable electronics.
  • This technique enables the creation of detachable and re-assemblable electronic devices.
  • The conductive elastomers and welding method enhance the durability and versatility of flexible circuits.