Tailoring the Electromagnetic Response of MoS₂ through Ni Doping for Promising Microwave Absorber

Editorial Board PCSS Journal; Regina Nadia Akhadi; Budhy Kurniawan; Sitti Ahmiatri Saptari

doi:10.15330/pcss.27.3.510-518

Authors

Regina Nadia Akhadi Department of Physics, University of Indonesia, Depok, Jawa Barat, Indonesia
Budhy Kurniawan Department of Physics, University of Indonesia, Depok, Jawa Barat, Indonesia
Sitti Ahmiatri Saptari Physics Department, Faculty of Science and Technology, Syarif Hidayatullah State Islamic University Jakarta, Tangerang Selatan, Banten, Indonesia https://orcid.org/0000-0001-7742-1012

DOI:

https://doi.org/10.15330/pcss.27.3.510-518

Keywords:

Microwave absorption, Ni-doped MoS₂, hydrothermal synthesis, magnetic properties, reflection loss

Abstract

. Transition-metal doping offers a promising route to enhance the microwave absorption performance of layered materials. In this work, Ni-doped MoS₂ nanostructures with varying concentrations (0–4 at%) were synthesized via a hydrothermal method to systematically investigate the effect of Ni incorporation on structural, magnetic, and electromagnetic properties. XRD analysis confirmed that Ni doping preserved the hexagonal MoS₂ phase while inducing lattice contraction and reduced crystallite size. SEM observations revealed increasingly compact agglomerated nanosheet-flower morphologies with higher Ni content, indicative of enhanced nucleation and crystal growth. VSM measurements demonstrated that Ni doping significantly improved magnetic properties, with the 4 at% sample exhibiting the highest saturation magnetization (1.101 emu/g) and lowest coercivity (830 Oe), characteristic of soft ferromagnetism. Microwave absorption tests in the X-band (8–12 GHz) showed that Ni doping markedly increased reflection loss and broadened the effective bandwidth. Optimal performance was achieved at 4% Ni, with a maximum reflection loss of –27.91 dB (approximately 99.84% absorbance) at 10.60 GHz and an effective bandwidth of 0.64 GHz. These findings highlight Ni doping as an effective strategy to tailor the electromagnetic response of MoS₂, offering strong potential for stealth technology and electromagnetic interference (EMI) shielding applications.

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