Electromagnetic wave absorption performance of NiCo2X4 (X = O, S, Se, Te) spinel structures

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

“…Many suitable absorbers have been developed, such as carbon materials [11], alloys [12], transition metal oxides/ sulfides/selenides [13][14][15], and MXene [16]. With the development of technology, the requirements for the EMW absorption properties and the condition of using EMWabsorbing materials are become more and more stringent.…”

Highly Performant Electromagnetic Absorption at the X Band Based on Co@NCS/Ti3C2Tx Composites

“…Moreover, Co@NCS/Ti 3 C 2 T x –1/1 obtained by combination of Co@NCS and Ti 3 C 2 T x also had the above characteristic peaks, and the numerous polar functional groups brought the possibility of strong polarization loss (Figure S5). After the addition of Co@NCS to Ti 3 C 2 T x nanosheet, two broad bands at 1335 and 1585 cm –1 appeared from the original peaking linear curve, which were located in D band and G band, respectively . Therefore, it was proved that Co@NCS/Ti 3 C 2 T x –1/1 nanocomposites not only possessed carbon hybrid products after pyrolysis, but also had rich elements and functional groups .…”

“…Among them, the ε′ and μ′ were related to the storage of electric and magnetic energy, while ε″ and μ′′ were associated with the dissipation of electric and magnetic energy. , In addition, dielectric loss tangent (tan δ ε = ε″/ε′) and magnetic loss tangent (tan δ μ = μ″/μ′) were calculated to evaluate dielectric loss and magnetic loss, respectively, as shown in Figure e, f. In particular, ε″ was determined by the relaxation and conductance. The corresponding formula was as follows: , ε ′ = ε ∞ + ε s − ε ∞ 1 + ω 2 τ false( T false) 2 ε ″ = ε p ′′ + ε c ′′ = ε s − ε ∞ 1 + ω 2 τ false( T false) 2 ω τ false( T false) + σ false( T false) ω ε 0 where ε s is the static dielectric constant, ε ∞ is the relative dielectric constant at high frequency limit, ω is the angular frequency, ε″ consist of ε p ″ contributes by relaxation and ε c ″ contributed by conductance, σ is the temperature-dependent electrical conductivity,...…”

Multifunctional Integrated Transparent Film for Efficient Electromagnetic Protection

“…Entering into the age of fifth generation communication, the mushroom development of wireless communication equipment and flexible electronics has accelerated the human society process. However, the accompanying electromagnetic radiation becomes a "health killer" to human [1][2][3][4]. Exploring materials with high-efficient and stable electromagnetic wave attenuation capability is a feasible strategy to reduce electromagnetic pollution [5,6].…”