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Related Concept Videos

The Electromagnetic Spectrum02:37

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The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
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Range00:59

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The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda:
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Electromagnetic Waves01:30

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James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
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Electromagnetic Fields01:30

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Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
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¹H NMR: Long-Range Coupling01:27

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The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Electromagnetic Shielding Materials in GHz Range.

Marta González1, Javier Pozuelo1, Juan Baselga1

  • 1Departmento de Ciencia e Ingeniería de Materiales e Ingeniería Química (IAAB), Universidad Carlos III de Madrid, Avda. de la Universidad, 30, 28911) Leganés, Madrid, Spain.

Chemical Record (New York, N.Y.)
|January 31, 2018
PubMed
Summary
This summary is machine-generated.

This review covers electromagnetic shielding materials, focusing on carbon-based composites like graphene and carbon nanotubes. Tailoring material properties enhances their effectiveness against electromagnetic pollution from developing telecommunication technologies.

Keywords:
Absorbed materialsCarbon nanotubesConductivityElectromagnetic shieldingGraphenePores

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Electromagnetic pollution is a growing concern due to advancements in telecommunication technology.
  • Development of effective electromagnetic shielding materials is crucial for mitigating interference and ensuring device reliability.
  • Current research focuses on novel composite materials for superior shielding performance.

Purpose of the Study:

  • To review the state-of-the-art in electromagnetic shielding materials design and manufacturing.
  • To provide an overview of how absorption properties of composites can be tailored.
  • To highlight the role of carbon-based materials in electromagnetic shielding applications.

Main Methods:

  • Review of existing literature on electromagnetic shielding materials.
  • Analysis of composite properties influenced by geometry, composition, and morphology.
  • Discussion on the dispersion of conductive fillers (e.g., graphene, carbon nanotubes) in polymer matrices.
  • Exploration of complex architectures like foam-based materials and hybrid composites.

Main Results:

  • Electromagnetic shielding effectiveness can be optimized by controlling composite characteristics.
  • Carbon materials, including graphene and carbon nanotubes, show significant promise for absorption and reflection of electromagnetic radiation.
  • Advanced architectures and combinations with other materials (e.g., metallic nanoparticles) offer enhanced shielding capabilities.

Conclusions:

  • Composite materials, particularly those incorporating carbon fillers, are effective for electromagnetic shielding.
  • Tailoring material design is key to developing advanced solutions for electromagnetic pollution.
  • Further research into complex architectures and hybrid materials will drive innovation in electromagnetic shielding technology.