Phys.org January 25,2023 An international team of researchers (Sweden, China) experimentally demonstrated, for the first time, a mechanically flexible silver mesh that is visibly transparent, allows high-quality infrared wireless optical communication and efficiently shields electromagnetic interference in the X band portion of the microwave radio region. The Ag mesh/polyethylene (PE) achieved high average EMI shielding effectiveness (SE) of 28.8 dB in the X band with an overall transmittance of 80.9% at 550 nm. With a polydimethylsiloxane (PDMS) coating, the average EMI SE was still up to 26.2 dB and the overall transmittance was increased to 84.5% at 550 nm due […]
Tag Archives: Em shielding
Blocking radio waves and electromagnetic interference with the flip of a switch
Phys.org January 16, 2023 Foam materials can adjust the reflection and absorption of microwaves, enabling a tunable electromagnetic interference shielding capability. But their thickness of several millimetres hinders their application in integrated electronics. Researchers at Drexel University have developed a method for modulating the reflection and absorption of incident electromagnetic waves using various submicrometre-thick MXene thin films. The reversible tunability of electromagnetic interference shielding effectiveness was realized by electrochemically driven ion intercalation and de-intercalation; this resulted in charge transfer efficiency with different electrolytes, accompanied by expansion and shrinkage of the MXene layer spacing. They demonstrated an irreversible electromagnetic interference shielding […]