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Related Concept Videos

Factors Affecting Solubility04:01

Factors Affecting Solubility

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Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
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Solubility Equilibria03:07

Solubility Equilibria

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Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many natural and technological processes, ranging from tooth decay to water purification. An understanding of the factors affecting compound solubility is, therefore, essential to the effective management of these processes. This section applies previously introduced equilibrium concepts and tools to systems involving dissolution and precipitation.
The...
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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

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Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
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Physical Properties Affecting Solubility02:19

Physical Properties Affecting Solubility

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Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
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Solution Composition During Acid/Base Titrations01:17

Solution Composition During Acid/Base Titrations

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The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...
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Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
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Transient Light Emitting Devices Based on Soluble Polymer Composites.

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Researchers developed a water-dissolvable transient electroluminescent device for displays and lighting. This innovation offers a sustainable solution to electronic waste from consumer electronics.

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Area of Science:

  • Materials Science
  • Electronics Engineering
  • Environmental Science

Background:

  • Electronic waste (e-waste) poses significant environmental challenges.
  • Transient electronics offer a sustainable alternative to traditional electronic devices.
  • Transient light-emitting devices are highly sought after for consumer electronics.

Purpose of the Study:

  • To develop a flexible, large-area transient alternating current electroluminescent (ACEL) device.
  • To achieve full-solution processing for efficient fabrication.
  • To create a water-dissolvable light-emitting device to combat e-waste.

Main Methods:

  • Fabrication of a flexible ACEL device using AgNW-polymer electrodes via a full-solution process.
  • Tuning emission color by adjusting the mass ratio of blue and yellow phosphors.
  • Demonstration of controlled size and patterned structures for light emission.
  • Testing the device's solubility in water.

Main Results:

  • Successful fabrication of a large-area, flexible transient ACEL device.
  • Achieved controlled, patterned light emission from both ends of the device.
  • Demonstrated tunable emission colors from white to blue.
  • The device completely dissolved in water within 30 minutes.

Conclusions:

  • The developed transient ACEL device provides a promising solution for reducing e-waste in lighting and display applications.
  • The full-solution processing and water solubility offer a sustainable and efficient fabrication method.
  • This work expands the possibilities for air-stable, flexible light-emitting devices with reduced environmental impact.