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Related Concept Videos

Colloids and Suspensions01:17

Colloids and Suspensions

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
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Colloids03:22

Colloids

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
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Colloidal precipitates01:09

Colloidal precipitates

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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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Coagulation01:06

Coagulation

351
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
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Centrifugation01:05

Centrifugation

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Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
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Cell Inclusions01:27

Cell Inclusions

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Prokaryotic cells possess a variety of inclusions that play crucial roles in nutrient storage, metabolic processes, and environmental adaptation. These structures enable bacteria to thrive under fluctuating environmental conditions by storing essential resources and optimizing their metabolic efficiency.Carbon Storage: Poly-β-Hydroxybutyric Acid and Glycogen GranulesBacteria frequently store excess carbon in specialized granules. Poly-β-hydroxybutyric acid (PHB) granules are lipid...
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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
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High density deposits of binary colloids.

Hyoeun Kim1,2,3, Marta Gonçalves1, Sung Hoon Kang4

  • 1Soft Matter Physics Laboratory, School of Advanced Materials Science and Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, South Korea.

Scientific Reports
|December 24, 2022
PubMed
Summary
This summary is machine-generated.

Achieve uniform, high-density colloid deposits using binary colloids and plasma-treated micropillar arrays. This method enhances inkjet printing and coating technologies with crack-free, symmetric results.

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Area of Science:

  • Materials Science
  • Surface Science
  • Colloid Science

Background:

  • Colloids are crucial for inkjet printing and coating.
  • Uniform, high-density colloid deposits are desired for advanced applications.
  • Binary colloids offer potential for improved coating density and uniformity.

Purpose of the Study:

  • To develop a strategy for high-density binary colloid deposits.
  • To achieve uniform, crack-free, and symmetric deposits.
  • To understand the role of surface energy modification in deposit formation.

Main Methods:

  • Utilizing droplet evaporation on micropillar arrays.
  • Employing plasma treatment to modify micropillar surface energy.
  • Conducting X-ray microscopic and tomographic characterizations.

Main Results:

  • Demonstrated a strategy for high-density binary colloid deposition.
  • Achieved uniform, crack-free, and symmetric deposits.
  • Linked deposit quality to temporary surface energy modification of micropillars.

Conclusions:

  • Temporary surface energy modification is key to controlled high-density deposits.
  • The developed strategy is simple, low-cost, and scalable.
  • This method offers a viable route for high-quality colloid deposits in various applications.