Ionic liquid-dispersed PDMS/SWCNT/Ag@Ni hybrid composite for temperature- and pressure-sensitive smart electromagnetic shielding applications

Abstract

The development of highly sophisticated self-adapting intelligent electronic and communication systems in military, aerospace, robotics, etc., prompted the requirement of externally stimulated green shielding material to protect them from electromagnetic...

An Integrated Approach for Piezo-Electrochemical Nanoenergy Generation, Storage, and Real-Time Electromagnetic Interference Shielding Control

“…plot with a negative slope represents the dominance of conduction loss, whereas a sigmoidal curve represents the dominance of polarization loss. 5 Figure 7c shows the nonlinearity in the log(ε″)− log(freq.) curves, confirming the dominance of ε p ″ over ε c ″.…”

“…), and microelectromechanical systems (MEMS) has created a demand for externally managed, multifunctional, self-adoptable EMI shielding materials. 2,5 Particularly, the susceptibility of satellite and military communication devices (which operate within the 12−18 GHz frequency range) to electromagnetic interference (EMI) has presented a significant technical obstacle in developing externally controlled self-adaptive absorptionbased shielding materials. 5−7 In theory, EMI shielding materials must have a specific combination of electromagnetic properties (such as dielectric permittivity and magnetic permeability) and electrical conductivity.…”

“…Electromagnetic interference (EMI) is characterized by undesired disruption in electromagnetic radiation (EMR) signals or electrical paths caused by coupling with other stray EMR signals. EMI significantly impacts the functionality and reliability of electronic devices, as well as health of living beings. − Effective EMI mitigation strategies require the development of innovative EMI shielding materials against the unwanted EMR through reflection/absorption mechanisms. , However, reflection-based shielding of the EMR is undesirable because it can once again affect the functionality of parent/nearby electronic devices. Consequently, the focus of EMI shielding material research has been on creating materials that have increased absorption while minimizing reflection. − Furthermore, the relentless progress of highly sophisticated technological advancements such as humanoid robots, unmanned aerial vehicles (UAVs), driverless cars, military weaponry (stealth aircraft, radars, etc.…”

“…Consequently, the focus of EMI shielding material research has been on creating materials that have increased absorption while minimizing reflection. − Furthermore, the relentless progress of highly sophisticated technological advancements such as humanoid robots, unmanned aerial vehicles (UAVs), driverless cars, military weaponry (stealth aircraft, radars, etc. ), and microelectro-mechanical systems (MEMS) has created a demand for externally managed, multifunctional, self-adoptable EMI shielding materials. , Particularly, the susceptibility of satellite and military communication devices (which operate within the 12–18 GHz frequency range) to electromagnetic interference (EMI) has presented a significant technical obstacle in developing externally controlled self-adaptive absorption-based shielding materials. − …”

“…In theory, EMI shielding materials must have a specific combination of electromagnetic properties (such as dielectric permittivity and magnetic permeability) and electrical conductivity. − Hence, the shielding adoption capability of materials can be controlled/induced by the adjustment of the aforementioned properties by varying external stimuli like heat, mechanical stress, voltage, and humidity. ,,,,− Since higher electrical conductivity remains a key factor in EMI shielding, metals (Fe, Al, Cu, Ni, etc.) and carbonaceous materials (carbon nanotubes (CNTs), fibers, graphene, etc.)…”