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<p>Hybrid heterostructure (HHS) with alternating monolayer sheets of molybdenum disulfide (MoS<sub>2</sub>) and amino acid L-arginine (Arg) hydrate with Mo: Arg molar ration 1:0.1 was synthesized by exfoliation-restacking of LiMoS<sub>2</sub> precursor. The phase composition, atomic structure and bonding interactions within HHS were investigated by powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), differential scanning calorimetry (DSC) and density functional theory (DFT) calculations. The obtained results showed that a wide network of hydrogen bonds, with particularly strong NH∙∙∙S and HO∙∙∙S ones, combines the sulfide and organic sheets into a layered hybrid system with intersheet periodicity of 10.04 Å. The sulfide sheets of HHS were shown to be highly enriched (up to 70%) with the 1T-MoS<sub>2</sub> polymorph, which shows high photothermal activity in the near-infrared (NIR) region and exhibits much higher temperature stability in the hybrid structure than in the 1T phase taken alone. The aqueous HHS suspensions (3–28 ppm) demonstrated excellent photothermal performance in both NIR-I and NIR-II biological transparency windows, providing sustained conversion efficiency of laser radiation to heat of 50.4% at 808&#xa0;nm and 38.8% at 1064&#xa0;nm and good cyclability over multiple laser on/off switching. The described material is hoped to be promising for constructing biocompatible photothermal materials.</p> Graphical Abstract <p></p>

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Nanoarchitectonics of MoS2-Organic Heterostructure for Effective Biocompatible Photothermal Materials Functioning in NIR-I and NIR-II Bio-windows

  • 期刊论文

  • 发表日期：

    2026年1月2日

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  • Alexander S. Goloveshkin,
  • Alexander V. Naumkin,
  • Mikhail I. Buzin,
  • Alexandre S. Golub

摘要

Hybrid heterostructure (HHS) with alternating monolayer sheets of molybdenum disulfide (MoS2) and amino acid L-arginine (Arg) hydrate with Mo: Arg molar ration 1:0.1 was synthesized by exfoliation-restacking of LiMoS2 precursor. The phase composition, atomic structure and bonding interactions within HHS were investigated by powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), differential scanning calorimetry (DSC) and density functional theory (DFT) calculations. The obtained results showed that a wide network of hydrogen bonds, with particularly strong NH∙∙∙S and HO∙∙∙S ones, combines the sulfide and organic sheets into a layered hybrid system with intersheet periodicity of 10.04 Å. The sulfide sheets of HHS were shown to be highly enriched (up to 70%) with the 1T-MoS2 polymorph, which shows high photothermal activity in the near-infrared (NIR) region and exhibits much higher temperature stability in the hybrid structure than in the 1T phase taken alone. The aqueous HHS suspensions (3–28 ppm) demonstrated excellent photothermal performance in both NIR-I and NIR-II biological transparency windows, providing sustained conversion efficiency of laser radiation to heat of 50.4% at 808 nm and 38.8% at 1064 nm and good cyclability over multiple laser on/off switching. The described material is hoped to be promising for constructing biocompatible photothermal materials.

Graphical Abstract