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Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy
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Engineered Zn0.2Fe2.8O4@Cu(II)-Based Core@Shell Nanoparticles for Magnetic Hyperthermia-Enhanced Catalysis.

Nahuel Nuñez1,2,3,4, Carlos Díaz-Ufano5, Alvaro Gallo-Cordova5

  • 1Instituto de Nanociencia y Nanotecnología (CNEA-CONICET), Av. Bustillo 9500, (8400) S. C. de Bariloche (RN), Argentina.

ACS Applied Nano Materials
|May 14, 2026
PubMed
Summary
This summary is machine-generated.

Core@shell nanocatalysts combine magnetic hyperthermia and Fenton-like activity. This system uses alternating magnetic fields to remotely enhance catalytic degradation of dyes, showing promise for controlled chemical reactions.

Keywords:
Cu-based catalystcore@shell nanocatalystsheterogeneous Fentonmagnetic hyperthermiazinc ferrite

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Catalysis

Background:

  • Core@shell nanocatalysts integrate magnetic and catalytic properties for remote reaction control.
  • Magnetic nanoparticles can generate heat via magnetic hyperthermia under alternating magnetic fields.
  • Heterogeneous Fenton-like reactions utilize catalysts to generate hydroxyl radicals for degradation processes.

Purpose of the Study:

  • To develop and characterize Zn0.2Fe2.8O4@Cu-(II) core@shell nanocatalysts.
  • To investigate the magnetic hyperthermia properties of the zinc ferrite core.
  • To evaluate the catalytic activity of the copper shell, particularly under magnetic hyperthermia conditions.

Main Methods:

  • Synthesis and characterization of Zn0.2Fe2.8O4 nanoparticles with a Cu-(II) shell using techniques like XPS, EDS mapping, and ICP analysis.
  • Measurement of magnetic properties, including saturation magnetization and superparamagnetic behavior.
  • Evaluation of catalytic activity through electron paramagnetic resonance (EPR) experiments for ·OH radical generation and methylene blue degradation assays.

Main Results:

  • The synthesized core@shell nanoparticles exhibited superparamagnetic behavior and high saturation magnetization.
  • The copper shell demonstrated Fenton-like activity, catalyzing ·OH radical generation, which was significantly enhanced under alternating magnetic fields.
  • The core@shell system achieved 99% methylene blue degradation in 1 hour under alternating magnetic fields, outperforming conventional heating.

Conclusions:

  • Zn0.2Fe2.8O4@Cu-(II) core@shell nanocatalysts offer a dual magnetic-catalytic platform.
  • Remote activation via alternating magnetic fields enables enhanced catalytic performance through localized heating.
  • This approach presents a novel strategy for controlled catalytic reactions in various applications.