High-performance electromagnetic wave absorption in cobalt sulfide flower-like nanospheres

Abstract

A heterophase cobalt sulfide absorbing material with petal-like surface structure was prepared by a simple hydrothermal method.

Resonance loss due to the polarization accumulation effect induced by phosphorus vacancies for enhancing electromagnetic wave absorption

“…4d that the impedance matching of Co 3 O 4 @C deviated from 1, which was attributed to the lower dielectric parameter. In contrast, the impedance matching of CoP@C was close to 1 around ultra-high frequencies (15)(16)(17)(18). With the generation of phosphorus vacancies, it could be clearly observed in Fig.…”

“…15 Yuan et al constructed a heterophase cobalt sulfide with a petal-like surface structure and obtained an RL min value of À48.4 dB at 16.8 GHz when the matching thickness was 1.5 mm. 16 Wen et al synthesized Co 3 O 4 @NiCo 2 O 4 with a core-shell structure and reported an RL min value of À34.42 dB at 17.5 GHz. 17 Therefore, we need a simple and effective method to solve the weakness of insufficient dielectric loss and only absorbing high-frequency electromagnetic waves.…”