Effect of albumin coating on the magnetic behavior of Mn ferrite nanoclusters

The effect of clustering induced by albumin coating on the magnetic behaviour of ultra-small MnFe 2 O 4 nanoparticles has been systematically investigated and compared with that in pure Mn ferrite nanoparticle dense assembly, using a mesoscopic scale approach and numerical simulations reproducing th...

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Bibliographic Details
Published in:Nanoscale advances 2022-10, Vol.4 (2), p.4366-4372
Main Authors: Vasilakaki, Marianna, Ntallis, Nikolaos, Fiorani, Dino, Peddis, Davide, Trohidou, Kalliopi N
Format: Article
Language:English
Subjects:
Chemistry
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Summary:The effect of clustering induced by albumin coating on the magnetic behaviour of ultra-small MnFe 2 O 4 nanoparticles has been systematically investigated and compared with that in pure Mn ferrite nanoparticle dense assembly, using a mesoscopic scale approach and numerical simulations reproducing the experimental findings well. Our results provide evidence that in the coated system, the interplay between intra-particle and intra-cluster exchange interactions strongly affects the exchange bias and coercive field values, with the dipolar interactions playing a minor role. Instead, the albumin coating does not affect the thermal stability of the observed superspin glass phase, the freezing temperature being similar in the coated and uncoated systems. Intra-particle & intra-cluster interactions play a major role in the coercive field ( H C ) & exchange bias field ( H ex ). Tailoring magnetic properties by selecting an appropriate coating agent and coating procedure paves the way for novel applications.
ISSN:2516-0230
2516-0230
DOI:10.1039/d2na00458e