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<p>In this work, MoS<sub>2</sub> nanoparticles (NPs) are synthesized by laser ablation of molybdenum in thiourea. The effect of adding of sodium dodecyl benzene sulfonate (SDS) surfactant to thiourea on the properties of MoS<sub>2</sub> NPs was studied. X-ray diffraction (XRD) studies reveal that the synthesized MoS<sub>2</sub> NPs were crystalline with hexagonal structures. Field-emission scanning electron microscope (FESEM) investigations confirm the synthesized MoS2 NPs have spherical and hexagonal morphologies. The energy band-gap of MoS<sub>2</sub> prepared in thiourea solution was about 1.2&#xa0;eV and after addition of SDS is about 1.5&#xa0;eV. The chemical bonds between Mo-S at peaks at 766, 894 and 1457&#xa0;cm<sup>− 1</sup> were identified by FTIR analysis. The Raman spectra of MoS<sub>2</sub> shows formation (Mo-S) bond stretching mode. The current-voltage characteristic of n-MoS<sub>2</sub>/p-Si heterojunction prepared in thiourea and thiourea + SDS solutions were inspected during dark and illumination settings. The results reveal the responsivity of the fabricated devices increased from 0.9 to 1.17&#xa0;A/W at 650&#xa0;nm upon the addition of SDS surfactant to thiourea. The detectivity and quantum efficiency of the photodetector increases significantly after adding SDS surfactant. Energy band lineup of n-MoS<sub>2</sub>/p-Si photodetector under illumination was as well performed.</p>

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Novel synthesis of MoS2 nanoparticles via pulsed laser ablation in liquid for high-performance photodetection applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月15日

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  • Suaad S. Shaker,
  • Hanan A. Rawdhan,
  • Raid A. Ismail,
  • Ethar Yahya Salih,
  • Duha S. Ahmed,
  • Asmiet Ramizy,
  • Mustafa Kareem,
  • M. H. Eisa,
  • Lutfi Mohammed Abdalgadir,
  • M. M. Rashed

摘要

In this work, MoS2 nanoparticles (NPs) are synthesized by laser ablation of molybdenum in thiourea. The effect of adding of sodium dodecyl benzene sulfonate (SDS) surfactant to thiourea on the properties of MoS2 NPs was studied. X-ray diffraction (XRD) studies reveal that the synthesized MoS2 NPs were crystalline with hexagonal structures. Field-emission scanning electron microscope (FESEM) investigations confirm the synthesized MoS2 NPs have spherical and hexagonal morphologies. The energy band-gap of MoS2 prepared in thiourea solution was about 1.2 eV and after addition of SDS is about 1.5 eV. The chemical bonds between Mo-S at peaks at 766, 894 and 1457 cm− 1 were identified by FTIR analysis. The Raman spectra of MoS2 shows formation (Mo-S) bond stretching mode. The current-voltage characteristic of n-MoS2/p-Si heterojunction prepared in thiourea and thiourea + SDS solutions were inspected during dark and illumination settings. The results reveal the responsivity of the fabricated devices increased from 0.9 to 1.17 A/W at 650 nm upon the addition of SDS surfactant to thiourea. The detectivity and quantum efficiency of the photodetector increases significantly after adding SDS surfactant. Energy band lineup of n-MoS2/p-Si photodetector under illumination was as well performed.