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Related Concept Videos

Electrical Conductivity01:13

Electrical Conductivity

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In perfect conductors, the electric field inside is always zero due to the abundance of free electrons, which nullify any field by flowing. As a result, any residual charge resides on the surface.
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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
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Electric Field Inside a Conductor01:20

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The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
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A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Stretchable 3D lattice conductors.

Tingyao Li1, Yanhui Jiang, Kunhao Yu

  • 1Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089, USA. qimingw@usc.edu.

Soft Matter
|September 26, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces 3D-architected lattice conductors, enhancing soft material stretchability and enabling new applications in electronics. These novel conductors offer improved performance for devices in healthcare and soft robotics.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Electrical Engineering

Background:

  • 3D architectures are utilized for lightweight, strong cellular materials.
  • The application of 3D architectures in soft material design is emerging.
  • Soft conductors are crucial for flexible electronic applications.

Purpose of the Study:

  • To demonstrate how 3D architectures can facilitate the design of intrinsically stretchable lattice conductors.
  • To explore the enhancement of stretchability and reduction of effective density in soft conductors using 3D architectures.
  • To enable resistive sensing for large deformations in curved solids and improve wastewater stream monitoring.

Main Methods:

  • Fabrication of 3D-architected lattice conductors.
  • Experimental characterization of mechanical and conductive properties.
  • Development of theoretical models to analyze behavior.

Main Results:

  • 3D architectures significantly enhance the stretchability of soft conductors.
  • Reduced effective density achieved through 3D architectural design.
  • Demonstrated capability for resistive sensing of large deformations and wastewater monitoring.

Conclusions:

  • 3D-architected lattice conductors offer a pathway to advanced soft electronic materials.
  • These conductors show potential for diverse applications, including healthcare devices and soft robotics.
  • The study provides a foundation for future designs of 3D-architected electronics.