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Electromagnetic shielding

About: Electromagnetic shielding is a research topic. Over the lifetime, 53292 publications have been published within this topic receiving 388874 citations.


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Journal ArticleDOI
09 Sep 2016-Science
TL;DR: The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.
Abstract: Materials with good flexibility and high conductivity that can provide electromagnetic interference (EMI) shielding with minimal thickness are highly desirable, especially if they can be easily processed into films. Two-dimensional metal carbides and nitrides, known as MXenes, combine metallic conductivity and hydrophilic surfaces. Here, we demonstrate the potential of several MXenes and their polymer composites for EMI shielding. A 45-micrometer-thick Ti3C2Tx film exhibited EMI shielding effectiveness of 92 decibels (>50 decibels for a 2.5-micrometer film), which is the highest among synthetic materials of comparable thickness produced to date. This performance originates from the excellent electrical conductivity of Ti3C2Tx films (4600 Siemens per centimeter) and multiple internal reflections from Ti3C2Tx flakes in free-standing films. The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.

3,251 citations

Book
05 Apr 2022
TL;DR: In this paper, the authors present the Phasor Solution Method for calculating per-unit-length parameters and Crosstalk of multiconductor transmission lines for EMC systems.
Abstract: Preface. 1. Introduction to Electromagnetic Compatibility (EMC). 2. EMC Requirements for Electronic Systems. 3. Signal Spectra-The Relationship Between theTime Domain and the Frequency Domain. 4. Transmission Lines and Signal Integrity. 5. Nonideal Behavior of Components. 6. Conducted Emissions and Susceptibility. 7. Antennas. 8. Radiated Emissions and Susceptibility. 9. Crosstalk. 10. Shielding. 11. System Design for EMC. Appendix A: The Phasor Solution Method. Appendix B: The Electromagnetic Field Equations and Waves. Appendix C: Computer Codes for Calculating the Per-Unit-Length Parameters and Crosstalk of Multiconductor Transmission Lines. Appendix D: Spice (PSPICE) Tutorial. Index.

2,064 citations

Journal ArticleDOI
TL;DR: In this article, the direct implementation of the GIAO and CSGT methods for calculating nuclear magnetic shielding tensors at both the Hartree-Fock and density functional levels of theory is presented.
Abstract: The direct (recomputation of two‐electron integrals) implementation of the gauge‐including atomic orbital (GIAO) and the CSGT (continuous set of gauge transformations) methods for calculating nuclear magnetic shielding tensors at both the Hartree‐Fock and density functional levels of theory are presented. Isotropic 13C, 15N, and 17O magnetic shielding constants for several molecules, including taxol (C47H51NO14 using 1032 basis functions) are reported. Shielding tensor components determined using the GIAO and CSGT methods are found to converge to the same value at sufficiently large basis sets; however, GIAO shielding tensor components for atoms other than carbon are found to converge faster with respect to basis set size than those determined using the CSGT method for both Hartree‐Fock and DFT. For molecules where electron correlation effects are significant, shielding constants determined using (gradient‐corrected) pure DFT or hybrid methods (including a mixture of Hartree‐Fock exchange and DFT exchange...

1,998 citations

Journal ArticleDOI
01 Feb 2001-Carbon
TL;DR: Carbon materials for electromagnetic interference (EMI) shielding are reviewed in this article, including composite materials, colloidal graphite and flexible graphite, and they include carbon filaments of submicron diameter.

1,676 citations

Journal ArticleDOI
TL;DR: Chemical graphitized r-GOs, as the thinnest and lightest material in the carbon family, exhibit high-efficiency electromagnetic interference shielding at elevated temperature, attributed to the cooperation of dipole polarization and hopping conductivity.
Abstract: Chemical graphitized r-GOs, as the thinnest and lightest material in the carbon family, exhibit high-efficiency electromagnetic interference (EMI) shielding at elevated temperature, attributed to the cooperation of dipole polarization and hopping conductivity. The r-GO composites show different temperature-dependent imaginary permittivities and EMI shielding performances with changing mass ratio.

1,358 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20231,619
20223,090
20211,395
20202,379
20192,922
20182,821