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An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
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Area of Science:

  • Materials Science
  • Environmental Science
  • Physics

Background:

  • Rapid technological advancement has escalated electromagnetic and radiation pollution, posing global environmental and health threats.
  • Effective management requires minimizing pollution sources and developing advanced shielding materials.
  • Existing general-purpose shielding materials are insufficient, necessitating specialized membrane solutions.

Purpose of the Study:

  • To comprehensively review electromagnetic/radiation pollution causes and impacts.
  • To discuss membrane shielding materials as strategic solutions.
  • To analyze design concepts, innovations, mechanisms, and challenges in membrane shielding materials.

Main Methods:

  • Analysis of electromagnetic/radiation pollution origins and environmental impacts.
  • Review of existing literature on membrane shielding material design, mechanisms, and performance.
  • Summary of research progress, structural design, and characterization techniques.

Main Results:

  • Identified causes and environmental consequences of electromagnetic/radiation pollution.
  • Discussed the strategic role of membrane shielding materials in mitigating pollution.
  • Detailed the design, mechanisms, and performance of various membrane shielding materials.

Conclusions:

  • Membrane shielding materials offer tailored solutions for electromagnetic/radiation pollution control.
  • Further research and development are crucial for optimizing material performance and expanding applications.
  • These materials hold potential for diverse industrial applications, including electronics and nuclear medicine.