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Related Concept Videos

Colloids03:22

Colloids

21.4K
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...
21.4K
Colloids and Suspensions01:17

Colloids and Suspensions

3.6K
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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Colloidal precipitates01:09

Colloidal precipitates

6.5K
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...
6.5K
Masking and Demasking Agents01:19

Masking and Demasking Agents

3.7K
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
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Administering Oxygen by Mask01:30

Administering Oxygen by Mask

2.6K
Administering Oxygen by Mask
Administering oxygen by mask is a common nursing intervention that provides supplemental oxygen to patients with respiratory distress or chronic lung conditions. This procedure involves delivering oxygen at a specified rate through a face mask connected to an oxygen source.
Equipment
The equipment necessary for this procedure includes:
2.6K
Bacterial Transformation01:33

Bacterial Transformation

60.2K
In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
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Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

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Transformable masks for colloidal nanosynthesis.

Zhenxing Wang1,2,3,4, Bowen He1, Gefei Xu3

  • 1Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, China.

Nature Communications
|February 10, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces polymer shells as adjustable masks for advanced nanosynthesis, enabling precise, multi-step functionalization of colloidal particles beyond traditional methods.

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Area of Science:

  • Colloidal chemistry and materials science.
  • Nanotechnology and chemical synthesis.

Background:

  • The advancement of nanotechnology is constrained by limitations in its synthetic methodologies, particularly in controlling the functionalization of nanoparticles.
  • Current methods using facets and ligands offer limited control and versatility in nanoparticle modification.

Purpose of the Study:

  • To develop a novel approach for precise and versatile nanoparticle functionalization.
  • To overcome the limitations of existing nanosynthesis techniques by introducing polymer shells as controllable masks.

Main Methods:

  • Utilizing polymer shells as adjustable masks on colloidal particles.
  • Employing different modes of polymer shell transformation for selective functionalization.
  • Demonstrating multi-step modification of nanoparticles at specific locations.

Main Results:

  • Demonstrated the efficacy of polymer shells in enabling unconventional nanosynthesis designs.
  • Showcased versatile and multi-step functionalization of colloidal particles at selective locations.
  • Polymer masks provide firm attachment and ease of manipulation, surpassing ligand-based methods.

Conclusions:

  • Polymer shells offer a powerful and adaptable platform for advanced nanosynthesis.
  • This method significantly enhances the control and scope of colloidal particle functionalization.
  • The developed technique paves the way for sophisticated nanomaterial design and applications.