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Related Concept Videos

Mixtures of Acids03:27

Mixtures of Acids

21.6K
The pH of a solution containing an acid can be determined using its acid dissociation constant and its initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending upon the relative strength of the acids and their dissociation constants.
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
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Mixtures of Acids01:19

Mixtures of Acids

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The pH of a solution containing an acid can be determined using its acid dissociation constant and initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending on the relative strength of the acids and their dissociation constants.
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
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Conductors and Insulators01:19

Conductors and Insulators

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Some materials may easily let electrical charges pass through them, while others obstruct their flow. The former are called conductors and the latter insulators. The atomic structures of materials determine whether they are conductors or insulators of electricity.
Most metals are conductors. Their atomic configuration is such that one or more electron(s) are loosely bound to the nucleus in each atom. Thus, a sea of mobile electrons are available in them, known as free electrons. Their easy...
10.6K
Charge on a Conductor01:26

Charge on a Conductor

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An interesting property of a conductor in static equilibrium is that extra charges on the conductor end up on its outer surface, regardless of where they originate. Consider a hollow metallic conductor with a uniform surface charge density. Since the conductor itself is in electrostatic equilibrium, there should not be any electric field inside the conductor. Now, assume a Gaussian surface enclosing the hollow portion. Applying Gauss's law, the inner surface of the hollow conductor will not...
5.3K
Electric Field Inside a Conductor01:20

Electric Field Inside a Conductor

7.3K
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.
Suppose a piece of metal is placed near a positive charge. The free electrons in the metal are attracted to the external positive charge and migrate freely toward that region. This region then...
7.3K
Charging Conductors By Induction01:15

Charging Conductors By Induction

9.1K
The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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Printable Thick Copper Conductors from Optically Modulated Multidimensional Particle Mixtures.

Hye Jin Park1, Yejin Jo1,2, Sun Sook Lee1

  • 1Division of Advanced Materials , Korea Research Institute of Chemical Technology (KRICT) , 141 Gajeong-ro , Yuseong-gu, Daejeon 305-600 , Korea.

ACS Applied Materials & Interfaces
|May 7, 2019
PubMed
Summary

Researchers developed printable copper conductors using flash-light-sintering, overcoming issues like cracking and thickness limitations. This advancement enables low-cost, high-performance printed electronics with enhanced conductivity.

Keywords:
conductorcopperelectrodeprintthick

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Nanotechnology

Background:

  • Printing techniques offer processing advantages for creating complex architectures.
  • Printable electronics require low-cost, high-performance conductive materials.
  • Copper (Cu) particle-based fluids with flash-light-sintering (FLS) show promise for printed conductors.

Purpose of the Study:

  • To synthesize surface-oxidation-suppressed Cu nanoparticles, sub-micron particles, and flakes.
  • To regulate optical absorption characteristics for improved FLS processing.
  • To resolve crack formation and thickness limitations in FLS-processed Cu conductors.

Main Methods:

  • Synthesis of surface-oxidation-suppressed Cu particles (nanoparticles, sub-micron particles, flakes).
  • Adjustment of optical absorption via multidimensional mixture particle composition.
  • Application of flash-light-sintering (FLS) in air for conductor formation.

Main Results:

  • Successfully suppressed surface oxidation in Cu particles.
  • Resolved undesirable crack formation and thickness limitations in FLS-processed conductors.
  • Achieved crack-free, 13.2 μm thick printed Cu conductors with 11.4 μΩ cm resistivity.

Conclusions:

  • Adjusting optical behaviors of particulate layers is key to overcoming FLS processing challenges.
  • The proposed method enables the generation of high-quality printed Cu conductors.
  • Demonstrated practical application in electrical circuits, including electrodes and interconnections.