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 alertor through electrochemical oxidation of MXene films. In contrast with static electromagnetic interference shielding, their method offers opportunities to achieve active modulation that can adapt to demanding environments… read more. TECHNICAL ARTICLE
Thickness-dependent behaviour and cycling stability. Credit: Nature Nanotechnology (2023)Â