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Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
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Elastic Strain Energy for Shearing Stresses01:20

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As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
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The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles
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Multimodal Strain-Insensitive Liquid Metal Sheath-Core Fiber for Wearable Electronics.

Qingyu Guo1, Wei Gu1, Hengrui Gu1

  • 1State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China.

ACS Applied Materials & Interfaces
|January 16, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel liquid metal fiber conductor that maintains high conductivity and stability under various mechanical strains. This breakthrough offers a reliable solution for power delivery and signal transmission in digital garments and wearable electronics.

Keywords:
Core−sheath fiberElectronic textilesLiquid metalStrain-insensitiveStretchable conductorWearable electronics

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Textile Engineering

Background:

  • Wearable electronics require highly conductive and strain-insensitive conductors for reliable signal transmission.
  • Maintaining conductivity and stability under dynamic multimodal strains in wearable devices remains a significant challenge.

Purpose of the Study:

  • To develop a liquid metal fiber conductor that addresses the limitations of current technologies in wearable electronics.
  • To create a stable and highly conductive fiber capable of withstanding diverse mechanical deformations.

Main Methods:

  • Utilized a prestretch-induced self-coiling mechanism to engineer a liquid metal core-sheath fiber.
  • Integrated a microhelix conductive pathway within the fiber structure.
  • Tested the fiber's conductivity and resistance stability under various mechanical deformations (stretching, bending, pressing, twisting).

Main Results:

  • Achieved a high initial conductivity of 7.21 × 104 S/m.
  • Demonstrated remarkable resistance stability with a change rate below 0.8% under multimodal strains.
  • Successfully embroidered the fiber onto commercial garments for practical application testing.

Conclusions:

  • The developed liquid metal fiber (H-LM fiber) offers a robust and highly conductive solution for wearable electronics.
  • The fiber's stability under strain enables reliable power delivery and sensing signal transmission in dynamic conditions.
  • Presents a highly advantageous solution for the advancement of digital garments.