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PUBLICATIONS

Synthesis and Size Dependence of Strongly Interacting Ferrite Nano-Objects: Implications for Magnetic Particle Imaging and Spatially Resolved Thermometry

Published

Author(s)

Frank Abel, Eduardo De Lima Correa, Thinh Bui, Adam Biacchi, Michael J. Donahue, Mia Merritt, Jonathan Seppala, Solomon I. Woods, Angela Hight Walker, Cindi Dennis

Abstract

High crystal quality nano-ferrites with short surface ligands (oleic acid) were recently shown to exhibit enhanced spatial resolution in magnetic particle imaging (MPI). Here, we develop a simple one-pot thermal decomposition approach to produce ferrite magnetic nano-objects (MNOs) which strongly interact magnetically and have good synthetic reproducibility. The ferrite (iron oxide) MNOs were physically characterized by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), and dynamic light scattering (DLS). The MNOs were magnetically characterized by magnetometry and magnetic particle spectroscopy (MPS) to study their interactions and dynamics and suitability for spatially resolved magnetic thermometry. The experimental results are then correlated with micromagnetic simulations to gain insight into the formation of chains. The ferrite MNOs are then compared to the commercial MPI tracer Vivotrax; an enhanced signal and spatial resolution and temperature dependence are observed under the limited (ferrite-MNO optimal) field and frequency conditions used. These results confirm the importance of tuning the frequency and amplitude of the drive field best imaging/thermal performance.
Citation
Chemistry of Materials
Pub Type
Journals

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Local Download
Nanomaterials, Nanomagnetics, Nanofabrication / manufacturing, Nanochemistry and Magnetics

Citation

Abel, F. , De Lima Correa, E. , Bui, T. , Biacchi, A. , Donahue, M. , Merritt, M. , Seppala, J. , Woods, S. , Hight Walker, A. and Dennis, C. (2024), Synthesis and Size Dependence of Strongly Interacting Ferrite Nano-Objects: Implications for Magnetic Particle Imaging and Spatially Resolved Thermometry, Chemistry of Materials, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956703 (Accessed October 7, 2025)

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Created September 25, 2024, Updated June 4, 2025
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