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Related Concept Videos

Resistivity01:22

Resistivity

5.1K
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
5.1K
Resistance01:19

Resistance

6.8K
When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
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Susceptibility, Permittivity and Dielectric Constant01:26

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When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.
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Electrical Conductivity01:13

Electrical Conductivity

2.1K
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.
In a practical conductor, an applied electric field may be sustained, causing a flow of electrons, which produce a current. The differential form of the current, the current density, is related to the electric field.
More generally, it is related to the force per unit charge, which involves the...
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Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

948
A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...
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Resistance and Conductance01:25

Resistance and Conductance

730
A conductor's DC resistance at a given temperature is influenced by its resistivity, length, and cross-sectional area. Resistivity is an inherent property of the conductor material, with annealed copper serving as the international standard for measurement. For instance, the resistivity of hard-drawn aluminum at 20 degrees Celsius is 61% of the standard conductivity of annealed copper.
Various factors impact the resistance of a conductor. Spiraling in stranded conductors increases their...
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Related Experiment Video

Updated: Apr 29, 2026

Electrospinning Fundamentals: Optimizing Solution and Apparatus Parameters
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Electrospinning of thermal interface materials.

Xiachen Xiao1, Baoshan Xie1, Liangxuan Ouyang2

  • 1Key Laboratory of Renewable Energy Electric-Technology of Hunan Province, School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China.

Advances in Colloid and Interface Science
|December 18, 2025
PubMed
Summary

Electrospinning fabricates advanced thermal interface materials (TIMs) by controlling nanofiber structure for efficient heat dissipation in electronics. This method enhances thermal conductivity and reduces resistance, crucial for high-power systems.

Keywords:
ElectrospinningNanofibersThermal conductivityThermal interface materials

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Thermal Engineering

Background:

  • Increasing power densities in electronics necessitate advanced thermal management solutions.
  • Thermal Interface Materials (TIMs) are critical for efficient heat transfer between electronic components and heat sinks.
  • Electrospinning offers a scalable method for creating tailored TIMs.

Purpose of the Study:

  • To review how electrospinning influences thermal transport in TIMs.
  • To explore the mechanisms governing heat conduction and interfacial resistance.
  • To provide a roadmap for developing next-generation electrospun TIMs.

Main Methods:

  • Controlling electrospinning parameters (electric field, rheology, collector configuration).
  • Integrating multidimensional fillers into nanofiber architectures.
  • Analyzing colloidal and molecular mechanisms (solvent evaporation, hydrogen bonding, VDOS matching).

Main Results:

  • Electrospinning enables precise control over fiber morphology and filler dispersion.
  • Optimized electrospun TIMs exhibit enhanced phonon alignment and reduced interfacial resistance.
  • Demonstrated high thermal conductivity, flexibility, and robustness in polymer and PCM-based TIMs.

Conclusions:

  • Electrospinning is a versatile technique for fabricating high-performance TIMs.
  • Understanding interfacial mechanisms is key to optimizing thermal transport.
  • Electrospun TIMs offer a promising pathway for advanced thermal management in electronics.