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Videos de Conceptos Relacionados

LC Circuits01:21

LC Circuits

An LC circuit consists of an inductor and a capacitor, either in series or parallel. Consider a charged capacitor connected with an inductor in series. Before the switch is closed, all the energy of the circuit is stored in the electric field of the capacitor. When the switch is closed, the capacitor begins to discharge, producing a current in the circuit. The current, in turn, creates a magnetic field in the inductor. Because of the induced emf in the inductor, the current cannot change...
Integrator and Differentiator01:13

Integrator and Differentiator

Op-amp circuits have significant applications in various fields, including automotive engineering. One such application is cruise control systems in cars, where op-amp circuits are integral for maintaining a constant speed. In these systems, op-amps function as both integrators and differentiators.
An integrator within an op-amp circuit produces an output directly proportional to the integral of the input signal. This is achieved by replacing the feedback resistor in a typical inverting...
Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
Clamper Circuit01:14

Clamper Circuit

A clamper circuit, also known as a DC restorer, represents a specialized variant of the rectifier circuit, notable for its method of taking the output across the diode rather than the capacitor. This configuration lends to several distinctive applications, particularly in handling square wave inputs.
Within this circuit, the diode's orientation prompts the capacitor to charge up to the level of the most negative peak of the input signal. Upon reaching this state, the diode ceases to conduct,...
iChip01:24

iChip

The cultivation of environmental microorganisms has long been hindered by the inability to replicate complex native conditions in vitro. The isolation chip (iChip) addresses this limitation by facilitating the growth of previously uncultivable microorganisms through in situ incubation. Designed for high-throughput microbial cultivation, the iChip comprises hundreds of microchambers, each capable of housing a single microbial cell. These microchambers are loaded with a mixture of molten agar and...

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Video Experimental Relacionado

Updated: Jun 8, 2026

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires
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Circuitos integrados intrínsecamente extensibles de alta velocidad y gran escala

Donglai Zhong1, Can Wu1, Yuanwen Jiang1

  • 1Department of Chemical Engineering, Stanford University, Stanford, CA, USA.

Nature
|March 14, 2024
PubMed
Resumen

Los investigadores han desarrollado dispositivos electrónicos de alto rendimiento, intrínsecamente elásticos que imitan la piel. Estos materiales avanzados logran un alto rendimiento eléctrico y una integración a gran escala para aplicaciones en el control de la salud y las interfaces hombre-máquina.

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Área de la Ciencia:

  • Ciencias de los materiales
  • Ingeniería eléctrica
  • Nanotecnología

Sus antecedentes:

  • La electrónica intrínsecamente extensible ofrece potencial para aplicaciones avanzadas como el monitoreo continuo de la salud y el tratamiento médico autónomo.
  • La electrónica estirable actual está limitada por el bajo rendimiento eléctrico (nivel de silicio amorfo), pequeñas escalas de integración y funcionalidades restringidas.

Objetivo del estudio:

  • Desarrollar transistores intrínsecamente extensibles y circuitos integrados con mejor rendimiento eléctrico, funcionamiento de alta velocidad y capacidades de integración a gran escala.
  • Superar las limitaciones de las tecnologías electrónicas extensibles existentes.

Principales métodos:

  • Se emplearon innovaciones en materiales, procesos de fabricación, ingeniería de dispositivos y diseño de circuitos.
  • Desarrollo de transistores intrínsecamente extensibles con alta movilidad de efecto de campo y alta corriente de accionamiento.
  • Fabricación de circuitos integrados a gran escala y conjuntos de sensores táctiles de alta densidad.

Principales resultados:

  • Transistores intrínsecamente estirables con una movilidad media de efecto de campo >20 cm2/V·s bajo una tensión del 100% y una densidad del dispositivo de 100.000 transistores/cm2.
  • Circuitos integrados demostrados a gran escala (> 1.000 transistores) con frecuencias de conmutación > 1 MHz, superando la electrónica estirable anterior.
  • Desarrolló un sistema de reconocimiento de braille de alto rendimiento utilizando una matriz de sensores táctiles de alta densidad (2.500 unidades / cm2) y una pantalla LED de actualización rápida.

Conclusiones:

  • La electrónica intrínsecamente extensible desarrollada logra un rendimiento eléctrico comparable al de la electrónica flexible de última generación en sustratos rígidos.
  • Los avances significativos en el rendimiento del dispositivo mejoran sustancialmente las capacidades de la electrónica similar a la piel para diversas aplicaciones.
  • La tecnología permite nuevas posibilidades para sensores portátiles, interfaces hombre-máquina y soluciones avanzadas de atención médica.