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Updated: Apr 23, 2026
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Synthesis of 68Ga Core-doped Iron Oxide Nanoparticles for Dual Positron Emission Tomography /T1Magnetic Resonance Imaging
Published on: November 20, 2018
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Characterization of Fe3O4/SiO2/Gd2O(CO3)2 core/shell/shell nanoparticles as T1 and T2 dual mode MRI contrast agent
Meicheng Yang1, Lipeng Gao2, Kai Liu2
1Chemistry Department, East China Normal University, Shanghai 200241, PR China; Antibiotics Department, Shanghai Institute for Food and Drug Control, Shanghai 201203, PR China.
Talanta
|October 5, 2014
Summary
New core/shell/shell nanoparticles (Fe3O4/SiO2/Gd2O(CO3)2) act as dual T1-T2 contrast agents for MRI. Their properties can be tuned by silica layer thickness, showing potential for biomedical applications.
Area of Science:
- Materials Science
- Nanotechnology
- Biomedical Engineering
Background:
- Magnetic nanoparticles are crucial for medical imaging.
- Developing dual-mode contrast agents offers improved diagnostic capabilities.
- Iron oxide and Gadolinium compounds are widely studied for MRI applications.
Purpose of the Study:
- To synthesize and characterize novel Fe3O4/SiO2/Gd2O(CO3)2 core/shell/shell nanoparticles.
- To investigate their potential as T1-T2 dual-mode contrast agents for magnetic resonance imaging (MRI).
- To explore the influence of the silica layer on magnetic properties and relaxivity.
Main Methods:
- Core/shell/shell nanoparticle synthesis.
- Structural and magnetic characterization (e.g., TEM, VSM).
- Relaxivity measurements for T1 and T2 signal evaluation.
Main Results:
- Successful synthesis of Fe3O4/SiO2/Gd2O(CO3)2 nanoparticles.
- Tunable T1 and T2 signals achieved by controlling SiO2 layer thickness.
- Enhanced transverse relaxivity observed due to magnetic coupling between Gd(3+) and Fe3O4.
- Demonstrated good biocompatibility of the synthesized nanoparticles.
Conclusions:
- Fe3O4/SiO2/Gd2O(CO3)2 nanoparticles represent a promising new class of MRI contrast agents.
- The core/shell/shell structure allows for modulation of MRI signal properties.
- These nanoparticles exhibit significant potential for diverse biomedical applications.
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