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<p>This work reports the preparation of two novel magnetic nanoparticles (Fe<sub>3</sub>O<sub>4</sub>) coated with L-cysteine and UiO-66 Metal-Organic Framework (MOF) by a seeding solvothermal approach. Physical characterization of the products was performed by scanning electron microscopy, powder diffraction X-ray analysis, FTIR and Raman spectroscopy, dynamic light scattering with zeta potential determination, and thermogravimetric analysis. The heating efficiency of these magnetic nanocomposites was evaluated under an alternating current (AC) magnetic field. The specific absorption rate (SAR) values were 3.541 W/g for UiO66/Fe<sub>3</sub>O<sub>4</sub>@Cys-1 and 15.074 W/g for UiO66/Fe<sub>3</sub>O<sub>4</sub>@Cys-2. One system demonstrated a significant temperature increase compared to bare Fe<sub>3</sub>O<sub>4</sub> nanoparticles or L-cysteine-coated Fe<sub>3</sub>O<sub>4</sub> nanoparticles. These UiO-66-coated magnetic nanoplatforms show promise for potential magnetic hyperthermia applications.</p> Graphical Abstract <p></p>

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L-cysteine functionalized magnetite (Fe3O4) nanoparticles coated with UiO-66 metal-organic framework with enhanced magnetic hyperthermia response

  • 期刊论文

  • 发表日期：

    2025年6月12日

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  • M. Reyes-Miranda,
  • U. Salazar-Kuri,
  • M. G. Lopez-Merino,
  • R. Navarro-Amador,
  • M. A. Mendez-Rojas

摘要

This work reports the preparation of two novel magnetic nanoparticles (Fe3O4) coated with L-cysteine and UiO-66 Metal-Organic Framework (MOF) by a seeding solvothermal approach. Physical characterization of the products was performed by scanning electron microscopy, powder diffraction X-ray analysis, FTIR and Raman spectroscopy, dynamic light scattering with zeta potential determination, and thermogravimetric analysis. The heating efficiency of these magnetic nanocomposites was evaluated under an alternating current (AC) magnetic field. The specific absorption rate (SAR) values were 3.541 W/g for UiO66/Fe3O4@Cys-1 and 15.074 W/g for UiO66/Fe3O4@Cys-2. One system demonstrated a significant temperature increase compared to bare Fe3O4 nanoparticles or L-cysteine-coated Fe3O4 nanoparticles. These UiO-66-coated magnetic nanoplatforms show promise for potential magnetic hyperthermia applications.

Graphical Abstract