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Dipolar Magnetic Interactions in Mn-Doped Magnetite Nanoparticles Loaded into PLGA Nanocapsules for Nanomedicine Applications

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Nanocapsules made of PLGA copolymer and with a different load of oleate-coated Mn-doped magnetite nanoparticles are studied for potential nanomedicine applications as nanocarriers with magnetic functionalities, in particular magnetic heating.… Click to show full abstract

Nanocapsules made of PLGA copolymer and with a different load of oleate-coated Mn-doped magnetite nanoparticles are studied for potential nanomedicine applications as nanocarriers with magnetic functionalities, in particular magnetic heating. The mean size of the PLGA nanocapsules and of the magnetic nanoparticles is around 200 nm and 8 nm, respectively. The aim is to study to what extent the different concentration of magnetic nanoparticles and their confinement into the PLGA nanocapsules affect their spatial arrangement and their magnetic interaction. This is crucial for making progress in the field of magnetic nanocarriers, tailoring their magnetic properties and thus optimizing their performance. The results obtained by combining structural and magnetic analyses indicate that the nanoparticles form aggregates into the PLGA nanocapsules - reaching larger dimension in the sample with the higher magnetic load - and that the dipolar interactions rule the magnetization process and the magnetic relaxing beh...

Keywords: doped magnetite; nanomedicine applications; plga nanocapsules; magnetite nanoparticles; magnetic interactions; dipolar magnetic

Journal Title: Journal of Physical Chemistry C
Year Published: 2019

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