Video Experimental Relacionado
Updated: Sep 14, 2025
09:39
A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
Published on: May 9, 2016
8.0K
Monocapas coloidales para la respiración
Barry Chi Hong Lai1, Dengping Lyu1, Matthew Chan1
1Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, China.
Journal of the American Chemical Society
|July 19, 2025
Resumen
Los investigadores desarrollaron superredes coloidales 2D que pueden expandirse y contraerse de manera reversible, transformándose entre estructuras porosas. Este comportamiento de "respiración" ofrece una nueva estrategia para diseñar materiales reconfigurables y sensibles.
Área de la Ciencia:
- Ciencias de los materiales
- Ciencia coloidal
- La cristalografía
Sus antecedentes:
- Las transiciones polimórficas reversibles son clave en los cristales moleculares para materiales reconfigurables.
- La traducción de estas transiciones a superredes coloidales presenta desafíos únicos debido a la escala de partículas e interacciones.
Objetivo del estudio:
- Para diseñar superredes coloidales 2D capaces de expansión y contracción anisotrópica reversible ("respiración").
- Para lograr porosidad ajustable y reconfiguración estructural en conjuntos coloidales.
Principales métodos:
- Montaje de partículas poliédricas (forma hexagonal bipyramidal truncada) utilizando interacciones de agotamiento y campo eléctrico de CA.
- Utilizando la superposición de facetas y la alineación dipolar para la formación de superredes.
- Investigando la cinética de la reconfiguración estructural y el cambio de respuesta al estímulo.
Principales resultados:
- Se ha demostrado la transformación reversible entre los polimorfos de superred coloidal con mesoporos abiertos y cerrados.
- Se ha logrado la formación de diversas superredes rómbicas con ángulos axiales ajustables y porosidad.
- Se observa un cambio rápido y reversible, exhibiendo un comportamiento de "respiración" sensible a los estímulos.
Conclusiones:
- Desarrolló una estrategia para crear materiales coloidales biomiméticos receptivos a través de superredes de "respiración".
- Los hallazgos abren vías para el diseño de sistemas coloidales reconfigurables con propiedades ajustables.
- Destaca el potencial de las formas e interacciones de partículas diseñadas en el autoensamblaje coloidal.
Más Videos Relacionados
13:15Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
Published on: July 18, 2014
11.1K
07:38Preparation and Structural Evaluation of Epithelial Cell Monolayers in a Physiologically Sized Microfluidic Culture Device
Published on: July 1, 2022
1.4K
Videos de Conceptos Relacionados
01:05Breathing
60.3K
The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
60.3K
01:17Colloids and Suspensions
2.4K
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 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...
2.4K
03:22Colloids
17.9K
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...
17.9K
01:24External and Internal Respiration
4.8K
External respiration occurs in the lungs, and it is the first step in the journey of oxygen inside the body. When we inhale, oxygen enters our lungs and diffuses across the thin alveolar membrane. The alveoli are tiny, air-filled sacs that provide a vast surface area for gas exchange. Oxygen in the alveoli has a higher partial pressure (105 mmHg) than in the adjacent pulmonary capillaries (40 mmHg), establishing a pressure gradient. As a result, oxygen molecules move from the alveoli into the...
4.8K
01:09Colloidal precipitates
766
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...
766
01:17Steady, Laminar Flow Between Parallel Plates
340
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
340