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Related Concept Videos

Half wave rectifier01:20

Half wave rectifier

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A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
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Full wave rectifier01:22

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A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
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Bridge rectifier01:24

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The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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Related Experiment Video

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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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A 17 GHz molecular rectifier.

J Trasobares1, D Vuillaume1, D Théron1

  • 1Institute of Electronics, Microelectronics and Nanotechnology, CNRS and University Lille 1, Physics Department, Avenue Poincaré, CS60069, 59652 Villeneuve d'Ascq, France.

Nature Communications
|October 4, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed novel molecular diodes capable of high-frequency operation up to 17.8 GHz. These nanoscale devices show significant current density increases, paving the way for advanced radio frequency (RF) applications.

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Area of Science:

  • Nanotechnology
  • Molecular electronics
  • Radio frequency (RF) engineering

Background:

  • Molecular electronics aims for ultimate scaling using molecules for electronic functions.
  • Previous molecular devices were limited to low-frequency operations.

Purpose of the Study:

  • To demonstrate molecular diodes operating at significantly higher frequencies.
  • To investigate the radio frequency (RF) properties of nanoscale molecular junctions.

Main Methods:

  • Simultaneous measurement of direct current and radio frequency (RF) properties.
  • Utilized molecular junctions with gold nanocrystal electrodes and ferrocenyl undecanethiol molecules.
  • Employed an interferometric scanning microwave microscope for measurements.

Main Results:

  • Demonstrated molecular diodes operating up to 17.8 GHz.
  • Achieved a current density increase of several orders of magnitude compared to microscale diodes.
  • Measured a diode rectification ratio of 12 dB and extrapolated a cut-off frequency of 520 GHz.

Conclusions:

  • Nanoscale molecular diodes enable high-frequency operation.
  • These RF-molecular diodes present a promising alternative to silicon diodes for scaling and high-frequency applications.