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Related Concept Videos

Network Covalent Solids02:18

Network Covalent Solids

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Diamagnetism01:26

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Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
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Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Related Experiment Video

Updated: Aug 14, 2025

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons
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Magnetic-responsive Covalent Adaptable Networks.

Huan Liang1, Yen Wei1,2, Yan Ji1

  • 1The Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.

Chemistry, an Asian Journal
|January 16, 2023
PubMed
Summary
This summary is machine-generated.

Magnetic covalent adaptable networks (CANs) offer reprocessable polymers with dynamic bonds. These magnetic CANs enable precise control for applications like self-healing and shape-morphing, promising advancements in materials science.

Keywords:
covalent adaptable networkdopingmaterials sciencenanoparticlesoft actuator

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Area of Science:

  • Polymer Science
  • Materials Science
  • Nanotechnology

Background:

  • Covalent adaptable networks (CANs) are reprocessable polymers utilizing dynamic covalent bonds.
  • Incorporating magnetic particles into CANs creates composites with unique responsive properties.
  • Magnetic stimuli offer remote control, fast response, and deep penetration, ideal for advanced materials.

Purpose of the Study:

  • To review recent advancements in magnetic-responsive covalent adaptable networks (CANs).
  • To summarize the design, synthesis, and applications of these magnetic CANs.
  • To highlight the potential of magnetic CANs in academic and engineering fields.

Main Methods:

  • Literature review of magnetic-responsive CANs.
  • Analysis of design strategies for magnetic CAN composites.
  • Compilation of synthesis methods and functional applications.

Main Results:

  • Magnetic CANs exhibit magnetothermal effects and direct magnetic-field guidance.
  • These materials support functions like magnetic-assisted self-healing, welding, and shape-morphing.
  • Multi-responsive CANs can also react to light, electricity, or pH variations.

Conclusions:

  • Magnetic CANs are a rapidly developing area with significant potential.
  • Their unique properties facilitate diverse applications in soft actuators and beyond.
  • Continued research promises to expand their use in cutting-edge academic and engineering domains.