From Structure to Function: Understanding Synthetic Conditions in Relation to Magnetic Properties of Hybrid Pd/Fe-Oxide Nanoparticles

From Structure to Function: Understanding Synthetic Conditions in Relation to Magnetic Properties of Hybrid Pd/Fe-Oxide Nanoparticles

Maier, A. (TU Delft BT/Biocatalysis)
van Oossanen, R. (TU Delft RST/Medical Physics & Technology; Erasmus MC)
van Rhoon, G.C. (TU Delft RST/Applied Radiation & Isotopes; Erasmus MC)
Pignol, J.P.M. (Dalhousie University)
Dugulan, A.I. (TU Delft RST/Fundamental Aspects of Materials and Energy; TU Delft RID/TS/Instrumenten groep)
Denkova, A.G. (TU Delft RST/Applied Radiation & Isotopes)
Djanashvili, K. (TU Delft BT/Biocatalysis)

2022

Heterostructured magnetic nanoparticles show great potential for numerous applications in biomedicine due to their ability to express multiple functionalities in a single structure. Magnetic properties are generally determined by the morphological characteristics of nanoparticles, such as the size/shape, and composition of the nanocrystals. These in turn are highly dependent on the
synthetic conditions applied. Additionally, incorporation of a non-magnetic heterometal influences the final magnetic behavior. Therefore, construction of multifunctional hybrid nanoparticles with preserved magnetic properties represents a certain nanotechnological challenge. Here, we focus on palladium/iron oxide nanoparticles designed for combined brachytherapy, the internal form of radiotherapy, and MRI-guided hyperthermia of tumors. The choice of palladium forming the nanoparticle core is envisioned for the eventual radiolabeling with 103Pd to enable the combination of hyperthermia with brachytherapy, the latter being beyond the scope of the present study. At this
stage, we investigated the synthetic mechanisms and their effects on the final magnetic properties of the hybrid nanoparticles. Thermal decomposition was applied for the synthesis of Pd/Fe-oxide nanoparticles via both, one-pot and seed-mediated processes. The latter method was found to provide better control over morphology of the nanoparticles and was therefore examined closely by varying reaction conditions. This resulted in several batches of Pd/Fe-oxide nanoparticles, whose magnetic properties were evaluated, revealing the most relevant synthetic parameters leading to promising performance in hyperthermia and MRI.

hybrid nanoparticles
iron oxide
palladium
hermal decomposition
magnetization
superparamagnetism
hyperthermia
heating power

http://resolver.tudelft.nl/uuid:caa5a587-b2bb-40ba-a774-2da2f53b6fc7

https://doi.org/10.3390/nano12203649

2079-4991

Nanomaterials, 12 (20)

Institutional Repository

journal article

© 2022 A. Maier, R. van Oossanen, G.C. van Rhoon, J.P.M. Pignol, A.I. Dugulan, A.G. Denkova, K. Djanashvili