Video Experimental Relacionado
Updated: Sep 8, 2025
08:04
Assembling Molecular Shuttles Powered by Reversibly Attached Kinesins
Published on: January 26, 2019
7.0K
Los nanomotores supramoleculares Janus de doble motor con movimiento contrabalanceado
Jingxin Shao1, Shoupeng Cao1, Hailong Che1
1Bio-Organic Chemistry, Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513 (STO 3.41), 5600 MB Eindhoven, The Netherlands.
Journal of the American Chemical Society
|June 14, 2022
Resumen
Los investigadores desarrollaron nuevos nanomotores supramoleculares utilizando vesículas de polímero. Estos nanomotores de doble motor exhiben un movimiento controlable de "efecto balancín" impulsado por reacciones químicas y luz, lo que permite una dirección precisa para aplicaciones complejas.
Área de la Ciencia:
- Química supramolecular
- Nanotecnología
- Ciencia de los Polímeros
Sus antecedentes:
- Las vesículas poliméricas (estomatocitos) ensambladas a partir de copolímeros de bloque anfifílico ofrecen una plataforma versátil para la construcción de nanomotores.
- El desarrollo de nanomotores con múltiples mecanismos de propulsión controlables es crucial para aplicaciones avanzadas.
Objetivo del estudio:
- Para diseñar nanomotores supramoleculares con fuerzas de propulsión de contrapeso duales.
- Demostrar el control conmutable sobre el movimiento nanomotor mediante la modulación de fuerzas competidoras.
- Explorar el potencial de estos nanomotores en tareas complejas como el transporte y la remediación.
Principales métodos:
- Ensamblaje de vesículas poliméricas en forma de cuenco (estomatocitos) de polietileno glicol-bloqueo-poliestireno.
- Incorporación de la enzima catalasa para el movimiento inducido químicamente a través de la descomposición del peróxido de hidrógeno.
- Aplicación de un recubrimiento de oro hemisférico para la propulsión inducida por luz infrarroja cercana.
- Aplicación sincrónica de ambos métodos de propulsión para inducir un movimiento de "efecto columpio".
Principales resultados:
- Creación exitosa de nanomotores bimotores tipo Janus con mecanismos de propulsión ortogonales.
- Demostración de un movimiento de "efecto balancín" contrabalanceado resultante de fuerzas químicas y ligeras en competencia.
- Control preciso del movimiento del nanomotor, incluida la detención y la dirección, mediante la manipulación de la concentración de H2O2 y la potencia del láser.
- Verificamos la dirección del movimiento activado por la enzima usando las fuerzas opuestas.
Conclusiones:
- Los nanomotores supramoleculares desarrollados ofrecen control conmutable sobre su comportamiento móvil a través de sistemas de propulsión duales.
- La capacidad de modular el "efecto balancín" permite un ajuste fino de la actividad nanomotriz.
- Estos nanomotores bimotores son muy prometedores para aplicaciones en el transporte activo y la remediación del medio ambiente.
Videos de Conceptos Relacionados
01:05Mechanism of Ciliary Motion
3.9K
The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
3.9K
01:15Torque Free Motion
563
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
563
01:24Relative Motion Analysis - Velocity
429
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
429
00:46Motor Units
59.0K
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
59.0K
01:22Mechanical Systems
285
Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
285
01:43The Movement of Organelles and Vesicles
4.7K
In eukaryotic cells, cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
4.7K