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<p>Materials that have the ability to absorb microwaves are essential in applications involving attenuation of electromagnetic radiation. Among the several emerging materials, transition metal dichalcogenides, particularly molybdenum dichalcogenides, are promising materials for microwave absorption because of their large surface area, layered structure, and unique morphologies. Herein, we synthesized nanostructured MoX<sub>2</sub> (X = S, Se, Te) with unique morphologies using a scalable and low-cost hydrothermal method. The MoS<sub>2</sub> nanoflowers showed a reflection loss of −21.77&#xa0;dB at a frequency of 9&#xa0;GHz. The MoSe<sub>2</sub> nanorods showed a reflection loss of −30.12&#xa0;dB, while the MoTe<sub>2</sub> nanosheets showed a reflection loss of −24&#xa0;dB around 9&#xa0;GHz. The results indicate excellent absorption in the entire X-band with filler loading of MoX<sub>2</sub> nanostructures as low as 9 wt.%, dispersed in a paraffin wax matrix having a thickness of 3&#xa0;mm. This study effectively addresses critical challenges in microwave-absorbing materials, including the need for high performance at low filler loading, absorption in the entire X-band, scalability, and a lightweight design. This demonstrates that MoX<sub>2</sub>-based nanostructures are potential candidates for the development of microwave-absorbing materials for electromagnetic interference shielding and stealth applications.</p> Graphic Abstract <p></p>

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Morphology-Tuned Molybdenum Dichalcogenide Nanostructures for Enhanced Microwave Absorption Studies

  • 期刊论文

  • 发表日期：

    2025年7月25日

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  • Ruchika Thayil,
  • Saidi Reddy Parne

摘要

Materials that have the ability to absorb microwaves are essential in applications involving attenuation of electromagnetic radiation. Among the several emerging materials, transition metal dichalcogenides, particularly molybdenum dichalcogenides, are promising materials for microwave absorption because of their large surface area, layered structure, and unique morphologies. Herein, we synthesized nanostructured MoX2 (X = S, Se, Te) with unique morphologies using a scalable and low-cost hydrothermal method. The MoS2 nanoflowers showed a reflection loss of −21.77 dB at a frequency of 9 GHz. The MoSe2 nanorods showed a reflection loss of −30.12 dB, while the MoTe2 nanosheets showed a reflection loss of −24 dB around 9 GHz. The results indicate excellent absorption in the entire X-band with filler loading of MoX2 nanostructures as low as 9 wt.%, dispersed in a paraffin wax matrix having a thickness of 3 mm. This study effectively addresses critical challenges in microwave-absorbing materials, including the need for high performance at low filler loading, absorption in the entire X-band, scalability, and a lightweight design. This demonstrates that MoX2-based nanostructures are potential candidates for the development of microwave-absorbing materials for electromagnetic interference shielding and stealth applications.

Graphic Abstract