Video Experimental Relacionado
Updated: Feb 10, 2026
08:07
A Micropatterning Assay for Measuring Cell Chirality
Published on: March 11, 2022
2.7K
Una nanocinta de heliceno con una quiralidad muy amplificada
Nathaniel J Schuster1, Raúl Hernández Sánchez1, Daria Bukharina2
1Department of Chemistry and Columbia Nano Initiative , Columbia University , New York , New York 10027 , United States.
Journal of the American Chemical Society
|May 15, 2018
Resumen
Los investigadores han sintetizado una nueva nanocinta quiral de perileno-dimida. Esta estructura helicoidal única exhibe un dicroísmo electrónico circular excepcionalmente fuerte, allanando el camino para los materiales electrónicos quirales avanzados.
Área de la Ciencia:
- Ciencias de los materiales
- Química orgánica
- Nanotecnología
Sus antecedentes:
- Los nanomateriales quirales son cruciales para las aplicaciones electrónicas avanzadas.
- Los derivados de perileno-dimida (PDI) ofrecen propiedades electrónicas y ópticas ajustables.
Objetivo del estudio:
- Para sintetizar y caracterizar una nueva quiral, la forma persistente de perileno-diimida basado en la nanocinta.
- Para investigar las propiedades quirópticas de la nueva arquitectura de la nanocinta.
Principales métodos:
- Fusión de tres monómeros de perileno-dimida con subunidades de naftaleno.
- Caracterización de la superestructura helicoidal resultante mediante técnicas espectroscópicas.
Principales resultados:
- Síntesis exitosa de una nanocinta helicoidal con dos [6] subcomponentes de heliceno.
- Observación del dicroísmo electrónico circular intenso (ECD) con grandes efectos de algodón en el rango visible.
- Demostración de un aumento de orden de magnitud en el ECD en comparación con los análogos más pequeños.
Conclusiones:
- La nanocinta sintética posee propiedades quirópticas únicas.
- Esta arquitectura tiene un potencial significativo para el desarrollo de materiales electrónicos quirales avanzados.
- El estudio destaca la importancia del diseño molecular para lograr fuertes respuestas quirópticas.
Videos de Conceptos Relacionados
02:25Chirality
29.7K
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...
29.7K
02:30Chirality in Nature
17.3K
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.
17.3K
01:17Operational Amplifiers
2.0K
The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
2.0K
01:17MOSFET Amplifiers
531
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
531
01:14BJT Amplifiers
1.0K
Bipolar Junction Transistors (BJTs) are pivotal components in amplifier circuits, functioning as voltage-controlled current sources in their active region. This characteristic allows them to efficiently control the collector current through variations in the base-emitter voltage. Essentially, BJTs amplify power due to their ability to take a weak input signal and output a much stronger signal.
In BJT amplifier configurations, particularly in common-emitter setups, the transistor's role...
In BJT amplifier configurations, particularly in common-emitter setups, the transistor's role...
1.0K
01:25Instrumentation Amplifier
1.1K
An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
1.1K