NiCo2O4 nanoneedles decorated woven carbon fibres for electromagnetic shielding in X-band

In Situ Coating of Needle-like NiCo2O4 Magnetic Nanoparticles on Lightweight Reticulated Vitreous Carbon Foam toward Achieving Improved Electromagnetic Wave Absorption

“…In this context, the in situ growth of NPs not only provides a better NP adhesion with the substrate but also creates fascinating hierarchically nanostructured materials. 20 Moreover, to the best of our knowledge, a needle-like NiCo 2 O 4 NP coating on the RVC foam has not been reported hitherto.…”

“…The dip-coating method though provides a simple pathway for NP coating but may result in weak bonding between NPs and the substrate, unless proper care is taken in washing off the loosely bound NPs. In this context, the in situ growth of NPs not only provides a better NP adhesion with the substrate but also creates fascinating hierarchically nanostructured materials . Moreover, to the best of our knowledge, a needle-like NiCo 2 O 4 NP coating on the RVC foam has not been reported hitherto.…”

“…Further, owing to its high dielectric loss across the interface with other materials and large shape anisotropy, NiCo 2 O 4 nanostructures have been proven to be a promising electromagnetic wave-absorbing material. − Various nanostructured NiCo 2 O 4 − and, sometimes, its combination with other oxides , have shown excellent reflection loss. However, EMI shielding properties of NiCo 2 O 4 -embedded materials are little studied, except the study reported by Yadav et al, who have reported significant enhancement of shielding effectiveness for the NiCo 2 O 4 -coated woven carbon fabric (WCF) (∼72 dB) in comparison with the bare fabric (∼40 dB) …”

“…1 4 − 1 8 Various nanostructured NiCo 2 O 4 15−17 and, sometimes, its combination with other oxides 18,19 studied, except the study reported by Yadav et al, who have reported significant enhancement of shielding effectiveness for the NiCo 2 O 4 -coated woven carbon fabric (WCF) (∼72 dB) in comparison with the bare fabric (∼40 dB). 20 Carbon foam, often termed as reticulated vitreous carbon (RVC), is a low-density, highly porous, glassy, electrically conducting (10−100 S m −1 ) 21 material. It comprises predominantly of carbon as a major constituent (>95%).…”

Multilayer Ultrathin MXene@AgNW@MoS2 Composite Film for High-Efficiency Electromagnetic Shielding

“…With the widespread application and development of electronic products, electronic devices with high power, fast operation, small size, and satisfactory portability emanate diversified electromagnetic waves to the surrounding environment, − which conversely affects the functions of electronic devices and causes adverse health issues to living beings. − Materials with large permittivity and permeability are widely used in the field of electromagnetic interference (EMI) shielding. − Moreover, highly effective EMI shielding materials with ultrathin thickness and high electromagnetic shielding performance seem to be predictably imperative to reduce the health hazards of electromagnetic wave to surrounding organisms and to repel electromagnetic wave pollution in highly sensitive microelectronic devices for ensuring the reliable operation of electronic equipment.…”