Abstract:
Microwave absorptive materials (MAMs) are gaining significant attention due to their demand in
various fields such as aerospace, electronics, medical, and defense. These materials shield
microwaves by absorbing or reflecting the radiation. In this study, we determine the electromagnetic
parameters of materials which is based on the principle of the interaction between the
electromagnetic field and the electromagnetic medium. For their microwave absorption behavior,
two composite materials were designed and tested i.e., MoSe2/Alumina and MoSe2/MoS2. To
analyze the effective permittivity of nanomaterial samples Maxwell Garnett effective medium
theory was used. For extraction of S-Parameters in the X and Ku band range (8-18 GHz), models of
these composite materials were generated. The Reflection Loss, total Shielding, and percentage
absorption were calculated for these samples. In X-band range, 4mm thick sample of 0.4%
MoSe2/Alumina composite showed the maximum reflection loss value of -57.12dB. The
MoSe2/Alumina composite exhibited higher values of real part of effective permittivity. This can
be the reason for enhanced microwave absorptive property of this composite. On the other hand, for
MoSe2/MoS2 composite in X-band only a maximum RL value of -0.5dB was observed. Small
thickness of the composite can be responsible for the low reflection loss. However, in Ku band, the
MoSe2/MoS2 composite with a 3mm thickness demonstrated the highest value of reflection Loss,
of -51.90dB. It was found that both MoSe2 and MoS2 use the reflection phenomenon for microwave
shielding. The achieved microwave absorbing properties of the MoSe2/MoS2 nanocomposites
suggest promising applications in high-performance microwave absorbers. By incorporating 2D
transition metal dichalcogenides (TMDs) composites into our work, we can explore new
applications which was not feasible or optimized with polymer-based nanocomposites such as
electronics and defense industry. By utilizing TMDs composites, we can potentially enhance
performance, increase efficiency, or enable entirely new functionalities in these application areas.
