Video Experimental Relacionado
Updated: Apr 11, 2026
09:26
Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
10.6K
Lograr la especificidad del sitio en la síntesis coloidal en múltiples etapas
Yuhua Feng1,2, Yawen Wang1, Jiating He1
1†Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371.
Journal of the American Chemical Society
|June 10, 2015
Resumen
El control de la dinámica de crecimiento inhibe parcialmente la emergencia del dominio de plata (Ag). Esto conduce a nuevas nanoestructuras de oro-plata (Au-Ag) esfera- alambre-placa, lo que permite el diseño de materiales avanzados.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- Ingeniería Química Ingeniería Química.
Sus antecedentes:
- Controlar el crecimiento de los nanomateriales es crucial para desarrollar arquitecturas funcionales avanzadas.
- Comprender la dinámica de emergencia de dominio en nanoestructuras de aleación es clave para una síntesis precisa.
Objetivo del estudio:
- Demostrar la inhibición parcial del dominio emergente de la plata (Ag) a través de una dinámica de crecimiento controlado.
- Para sintetizar nuevas nanoestructuras triblock con morfologías específicas.
Principales métodos:
- Manipulación controlada de la dinámica de crecimiento de las nanopartículas.
- Utilizando una superficie "fresca" para romper la simetría durante el crecimiento secuencial.
Principales resultados:
- Se logró la inhibición parcial del dominio Ag. emergente.
- Se han sintetizado con éxito (esfera de oro) - alambre de plata - placa de plata) nanoestructuras triblock.
- Demostró el impacto de la ruptura de la simetría en el crecimiento secuencial.
Conclusiones:
- El control de la dinámica de crecimiento es una estrategia eficaz para ajustar las propiedades de los nanomateriales.
- El método desarrollado abre nuevas vías para diseños sintéticos sofisticados en nanotecnología.
- Las nanoestructuras de tribloque Au-Ag sintetizadas ofrecen potencial para futuras aplicaciones funcionales.
Videos de Conceptos Relacionados
01:09Colloidal precipitates
6.9K
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...
6.9K
01:29The Colloidal State
155
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
155
01:16Precipitate Formation and Particle Size Control
7.2K
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
7.2K
03:22Colloids
22.1K
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...
22.1K