Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Metallic Solids02:37

Metallic Solids

20.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.3K
Colloidal precipitates01:09

Colloidal precipitates

4.6K
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...
4.6K
Coagulation01:06

Coagulation

1.1K
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...
1.1K
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

2.0K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
2.0K
Colloids03:22

Colloids

20.4K
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...
20.4K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

30.2K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
30.2K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Metal-Phenolic Coatings Enable Universal Design of Spherical Nucleic Acids.

Angewandte Chemie (International ed. in English)·2026
Same author

Programmed synthesis of mesoporous protein crystals in cellular reactors.

Nature nanotechnology·2026
Same author

Correction to "DNA-Mediated Cellular Delivery of Functional Enzymes".

Journal of the American Chemical Society·2026
Same author

Author Correction: De novo design of quasisymmetric two-component protein cages.

Nature·2026
Same author

High-χ Block Copolymer Nanoreactors for the Confined Synthesis of Size-Controlled Nanoclusters.

ACS nano·2026
Same author

Programmable Stepwise Heteroepitaxial Growth of Colloidal Crystals With Different Phases.

Advanced materials (Deerfield Beach, Fla.)·2026
Same journal

Radical Cascades on Seawater Microdroplets Drive Atmospheric Mercury Oxidation.

Journal of the American Chemical Society·2026
Same journal

Superior Selective and Fast NH<sub>3</sub> Adsorption of Soft Porous MOF/Ionic Liquid Composites with Ordering Phase Transitions.

Journal of the American Chemical Society·2026
Same journal

Systematic Catalyst Variation for Improved Stereoselective Epoxide Polymerization: Subtle Modifications Resulting in Superior Efficiency.

Journal of the American Chemical Society·2026
Same journal

Deciphering the Halide Chemistry of Cl<sup>-</sup> and Br<sup>-</sup> in Enhancing Kinetics of Mg Plating/Stripping.

Journal of the American Chemical Society·2026
Same journal

Electrosynthesis of C<sub>6</sub> Chemicals by Propylene Oxidative Coupling on Au Surface.

Journal of the American Chemical Society·2026
Same journal

Statistical AI Enables Precise Screening of Multielement Catalysts.

Journal of the American Chemical Society·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: Jan 1, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

8.9K

Las "aleaciones" de cristal coloidal

Shunzhi Wang, Jingshan S Du, Nicolas J Diercks

    Journal of the American Chemical Society
    |December 17, 2019
    PubMed
    Resumen
    Este resumen es generado por máquina.

    Los investigadores crearon "aleaciones de cristal coloidal" utilizando nanopartículas modificadas por ADN, equivalentes de átomos programables (PAE) y equivalentes de electrones (EE). Este avance permite la formación predecible de diversas fases de aleación para el diseño de materiales avanzados.

    Más Videos Relacionados

    Synthesis and Characterization of Supramolecular Colloids
    09:26

    Synthesis and Characterization of Supramolecular Colloids

    Published on: April 22, 2016

    10.3K
    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

    Videos de Experimentos Relacionados

    Last Updated: Jan 1, 2026

    Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
    08:55

    Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

    Published on: June 7, 2018

    8.9K
    Synthesis and Characterization of Supramolecular Colloids
    09:26

    Synthesis and Characterization of Supramolecular Colloids

    Published on: April 22, 2016

    10.3K
    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

    Área de la Ciencia:

    • Nanotecnología
    • Ciencias de los materiales
    • La biofísica

    Sus antecedentes:

    • Los conjugados de nanopartículas de ADN permiten el ensamblaje preciso de superredes.
    • Formación de coloides
    • Iónico
    • las fases se establecen, pero
    • aleación
    • La formación de la fase es un reto.

    Objetivo del estudio:

    • Para diseñar y sintetizar
    • Aleaciones de cristales coloidales
    • el uso de nanopartículas de oro de diferentes tamaños como equivalentes atómicos programables (PAE).
    • Establecer directrices de diseño para la formación previsible de la fase de aleación.

    Principales métodos:

    • Síntesis de nanopartículas de oro modificadas por ADN de diferentes tamaños.
    • Ensamblaje de EAP con equivalentes de electrones (EE).
    • Caracterización mediante microscopía electrónica y dispersión de rayos X de ángulo pequeño (SAXS).

    Principales resultados:

    • Se ha demostrado la formación de cuatro clases de aleaciones coloidales: intersticiales, sustitutivas, separadas por fases e intermetálicas.
    • Parámetros clave identificados que influyen en la formación de la fase de aleación: relación de tamaño de la PAE, cobertura de ADN, estequiometría y recocido.
    • Investigó la cinética de la separación de fase utilizando SAXS in situ y microscopía electrónica ex situ.

    Conclusiones:

    • Estableció un marco para crear aleaciones de cristales coloidales programables.
    • Se han desarrollado directrices de diseño químico análogas a las reglas de Hume-Rothery para aleaciones.
    • Destacó la importancia de la cinética en el control del comportamiento de fase de las aleaciones coloidales.