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Related Concept Videos

Theory of Metallic Conduction01:17

Theory of Metallic Conduction

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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.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
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Electric Field Inside a Conductor01:20

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When a conductor is placed in an external electric field, the free charges in the conductor redistribute and very quickly reach electrostatic equilibrium. The resulting charge distribution and its electric field have many interesting properties, which can be investigated with the help of Gauss's law.
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The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a...
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Electric Field at the Surface of a Conductor01:26

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Consider a conductor in electrostatic equilibrium. The net electric field inside a conductor vanishes, and extra charges on the conductor reside on its outer surface, regardless of where they originate.
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Band Theory02:35

Band Theory

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When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
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Electrical Conductivity01:13

Electrical Conductivity

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Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
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Superionic Conduction in One-Dimensional Nanostructures.

Ki-Hyun Cho1, Prashant K Jain1,2,3

  • 1Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.

ACS Nano
|July 29, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed one-dimensional nanostructures for enhanced ion transport in solid electrolytes. This breakthrough in superionic conduction using copper selenide nanowires promises faster, more efficient next-generation batteries.

Keywords:
ion transportnanocrystalnanowirephase transitionsolid electrolyte

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Energy Storage

Background:

  • Nanostructuring is key for tuning material electronic properties and transport.
  • Nanocrystals show potential for fast ion conduction in solid electrolytes.
  • Lossy interfaces between nanocrystals hinder efficient ion transport over long distances.

Purpose of the Study:

  • To overcome limitations of nanocrystal interfaces for ion transport.
  • To explore the use of one-dimensional nanostructures for enhanced ionic conductivity.
  • To develop advanced solid electrolytes for next-generation battery technologies.

Main Methods:

  • Fabrication of solid electrolytes using copper selenide nanowires.
  • Investigation of ion transport properties in quasi-one-dimensional nanostructures.
  • Measurement of ionic conductivity at elevated temperatures.

Main Results:

  • Demonstrated superionic conduction in copper selenide nanowires with record ionic conductivity (~4 S/cm at 150 °C).
  • Achieved quasi-one-dimensional ionic conductivity approximately 5 times higher than bulk cuprous selenide.
  • Identified that radial nanoscale dimensions reduce ion-hopping barriers, while axial paths provide long, interface-free transport.

Conclusions:

  • One-dimensional nanostructures offer a promising strategy for efficient solid-state ion transport.
  • This approach significantly enhances ionic conductivity compared to bulk materials.
  • The findings pave the way for improved solid-state devices, particularly in battery applications.