Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Colloids03:22

Colloids

21.2K
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...
21.2K
Colloids and Suspensions01:17

Colloids and Suspensions

3.5K
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...
3.5K
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

974
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
974
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
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.9K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
1.9K
ATP Driven Pumps I: An Overview01:27

ATP Driven Pumps I: An Overview

9.9K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
9.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Opposite and reversible optical switching in soft-lattice halide perovskites using light and heat.

Science advances·2026
Same author

Reaction Medium as an Architect of Nanocrystal Superlattices.

Journal of the American Chemical Society·2026
Same author

Unlocking Anion Reduction of Lithium Perchlorate via Electrochemically Coupled Oxygen Atom Transfer.

Journal of the American Chemical Society·2026
Same author

Continuous-Flow Microfluidic Synthesis Enhances C<sub>2+</sub> Selectivity for Cu<sub>2</sub>O Catalysts.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

A Multifunctional Electrocatalyst for Formate Production with Concurrent Hydrogen Evolution and Electrochemical Hydrogenation of Glucose to Sorbitol.

ACS applied materials & interfaces·2026
Same author

Unlocking stable intermediate states in SrFeO<sub>3-δ</sub> through voltage control of oxygen non-stoichiometry.

Nature communications·2026

Related Experiment Video

Updated: Feb 7, 2026

A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
09:58

A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals

Published on: May 10, 2018

10.0K

Electrostatic-Driven Gelation of Colloidal Nanocrystals.

Taisiia Berestok1,2, Pablo Guardia1, Maria Ibáñez3

  • 1Catalonia Institute for Energy Research-IREC , Sant Adrià de Besòs 08930 , Barcelona , Spain.

Langmuir : the ACS Journal of Surfaces and Colloids
|July 18, 2018
PubMed
Summary

Researchers developed a new method using amino acid-functionalized nanocrystals to create stable gels. This enables the production of diverse, highly porous nanocomposite aerogels with tunable properties for various applications.

More Related Videos

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.5K
Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
09:12

Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures

Published on: August 10, 2017

8.0K

Related Experiment Videos

Last Updated: Feb 7, 2026

A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
09:58

A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals

Published on: May 10, 2018

10.0K
Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

10.5K
Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
09:12

Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures

Published on: August 10, 2017

8.0K

Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Colloidal nanocrystal (NC) assembly is a powerful technique for creating crystalline porous materials.
  • Current methods primarily focus on single-component nanomaterials, limiting the complexity of achievable structures.
  • Developing methods for multi-component NC assembly is crucial for advanced material design.

Purpose of the Study:

  • To report a novel gelation strategy for colloidal nanocrystal solutions driven by electrostatic interactions.
  • To demonstrate the creation of stable, positively charged nanocrystal colloids using amino acid functionalization.
  • To enable the production of homogeneous, multi-component porous nanocomposites.

Main Methods:

  • Functionalization of positively charged NCs with amino acids (e.g., glutamine) to ensure colloidal stability.
  • Mixing of oppositely charged NC solutions (e.g., glutamine-functionalized CeO2 NCs and Au NCs) to induce gelation.
  • Drying of the resulting gels using supercritical CO2 to form aerogels.

Main Results:

  • Stable colloidal solutions of positively charged NCs were successfully prepared using amino acid functionalization.
  • Homogeneous gels composed of mixed, oppositely charged NCs were formed, demonstrating broad applicability.
  • Supercritical CO2 drying yielded highly porous Au-CeO2 aerogels with a specific surface area of 120 m²/g.
  • Catalytic evaluation for CO oxidation confirmed the successful formation of the nanocomposite interface.

Conclusions:

  • Amino acid-mediated electrostatic attraction provides a robust method for assembling multi-component nanocrystal gels.
  • This approach facilitates the synthesis of diverse porous nanocomposites, including metal-metal oxide and metal-metal chalcogenide systems.
  • The resulting aerogels exhibit high porosity and tunable properties, suitable for advanced catalytic applications.