Nanostructured Films of Ordered Fe Nanowires for High-Performance Transparent Electromagnetic Interference Shielding

Abstract

Although metal nanowires (NWs), such as silver NWs, are ideal materials for flexible transparent electromagnetic shielding films, the challenge of obtaining absorptive shielding films with high transmittance and shielding efficiency (SE) still exists. To address this issue, this study used iron nanowires (Fe NWs) with excellent microwave absorbing properties to construct structures with ordered NW distributions. A series of polyethylene terephthalate (PET)/Fe NWs/poly (3,4-ethylenedioxythiophene) (PEDOT) electromagnetic interference (EMI) shielding films were prepared using the magneticfield-induced orientation. The results demonstrate that the ordered Fe NW network structure can effectively overcome the problem of the trade-off between light transmittance and EMI SE. Specifically, at a Fe NW surface density of 201.78 mg/m 2 , the ordered PET/Fe NWs/ PEDOT films demonstrated a 49.06% increase in light transmittance and a 32.94% increase in EMI SE (19.37 dB), compared to the films with randomly distributed Fe NWs. Furthermore, constructing a double-layer Fe NW network with a stagger angle of 45°at the same surface density increased the EMI SE by 73.2% relative to the monolayer-ordered Fe NW structure, reaching an SE value of 33.54 dB, while maintaining almost unchanged light transmittance. Additionally, the PET/Fe NWs/PEDOT films maintain 97.4% of EMI performance after 3000 bending cycles. Overall, this study provides a new approach for creating high-performance flexible transparent EMI shielding films.

Adsorption and Sensing Performances of a TiO2 Cluster-Doped Graphene Monolayer toward SOF2 and SO2F2

“…The PDOS of the 2 p orbital of the O1 atom and the 3 d orbital of the Ti atom in the 3TiO 2 -graphene system are shown in Figure (f), and they overlap from −4 to −2 eV, which is consistent with the bonding of the 3TiO 2 -graphene system in Table . The doped graphene system has stronger electrical conductivity and stability and facilitates the gases’ adsorption compared to pristine graphene adsorption. − …”

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In Situ Synthesis of Heterostructured Fe–Ni Nanowires with Tunable Electromagnetic Wave Absorption Capabilities

“…6,7 Unlike the former, absorbing materials show greater advantages in resisting EMW effects because they have the property of dissipating electromagnetic radiation energy into heat without reflecting it back into the environment again. 8,9 As known, the microstructure of nanomaterials has a significant impact on the study of wave absorption properties. One-dimensional heterogeneous nanostructures can provide multichannel multiple scattering and excellent specific surface to provide additional interfacial polarization to promote EMW depletion due to their inherent good electron transfer properties, powerful shape isotropy, and generous specific surface area.…”

“…With extremely high data transmission rates and low latency brought about by electromagnetic waves (EMWs) as a medium, the widespread use of various electronic devices has greatly improved information interaction. − However, high-frequency EMW has high energy density that causes significant risk to human well-being and the reliable functioning of sensitive equipment. , Therefore, researchers have prepared electromagnetic shielding or electromagnetic absorbing materials to resolve the above concern. , Unlike the former, absorbing materials show greater advantages in resisting EMW effects because they have the property of dissipating electromagnetic radiation energy into heat without reflecting it back into the environment again. , …”