Video Experimental Relacionado
Updated: Sep 9, 2025
09:43
Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
Published on: August 13, 2019
9.5K
La quiralidad óptima mejora las interacciones inducidas por fluctuaciones de largo alcance en fluidos activos
Hashem Fatemi1, Hamidreza Khalilian1, Jalal Sarabadani1
1School of Quantum Physics and Matter, Institute for Research in Fundamental Sciences (IPM), Tehran, 19538-33511, Iran.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 3, 2025
Resumen
La materia activa quiral se autoorganiza a través de las interacciones de las partículas. Quiralidad
Área de la Ciencia:
- Física de la materia blanda
- La materia activa
- Estudios de la quiralidad
Sus antecedentes:
- Comprender la autoorganización de la materia activa quiral es la clave.
- Las fuerzas inducidas por la fluctuación impulsan la formación de estructuras en sistemas activos.
- El papel de la quiralidad en estas fuerzas es poco explorado.
Objetivo del estudio:
- Investigar las fuerzas efectivas inducidas por la fluctuación entre intrusos en fluidos activos quirales.
- Determinar cómo la forma de la partícula influye en las interacciones quirales.
- Regímenes de fuerza de mapa a través de la quiralidad, la propulsión y la separación de intrusos.
Principales métodos:
- Investigación teórica de las fuerzas inducidas por la fluctuación efectiva.
- Análisis de las interacciones intruso-fluido en sistemas quirales activos.
- Mapeo de regímenes de fuerza basados en propiedades y separación de partículas.
Principales resultados:
- El impacto de la quiralidad en las interacciones es dependiente de la forma.
- Para las partículas circulares, el aumento de la relación rotación-propulsión suprime la interacción.
- Las partículas parecidas a varas exhiben una formación espontánea de vórtice alrededor de los intrusos en un ángulo quiral óptimo.
Conclusiones:
- Las interacciones de materia activa quiral son sintonizables por la forma y la quiralidad de las partículas.
- La formación de vórtices en sistemas de partículas tipo barra ofrece nuevos principios de autoensamblaje.
- Los hallazgos proporcionan información para el diseño y el control de sistemas autoensamblados activos.
Videos de Conceptos Relacionados
02:30Chirality in Nature
13.8K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
13.8K
02:25Chirality
25.2K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
25.2K
02:24Properties of Enantiomers and Optical Activity
17.6K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
17.6K
02:34Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
8.6K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.6K
02:05Prochirality
3.9K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
3.9K
02:35Noncovalent Attractions in Biomolecules
54.5K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
54.5K