Platinum dendritic nanoparticles with magnetic behavior

Li, Wenxian, Sun, Ziqi, Tian, Dongliang, Nevirkovets, Ivan P., & Dou, Shi-Xue (2014) Platinum dendritic nanoparticles with magnetic behavior. Journal of Applied Physics, 116(3), Article Number-033911.

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Magnetic nanoparticles have attracted increasing attention for biomedical applications in magnetic resonance imaging, high frequency magnetic field hyperthermia therapies, and magnetic-field-gradient-targeted drug delivery. In this study, three-dimensional (3D) platinum nanostructures with large surface area that features magnetic behavior have been demonstrated. The well-developed 3D nanodendrites consist of plentiful interconnected nano-arms ∼4 nm in size. The magnetic behavior of the 3D dendritic Pt nanoparticles is contributed by the localization of surface electrons due to strongly bonded oxygen/Pluronic F127 and the local magnetic moment induced by oxygen vacancies on the neighboring Pt and O atoms. The magnetization of the nanoparticles exhibits a mixed paramagnetic and ferromagnetic state, originating from the core and surface, respectively. The 3D nanodendrite structure is suitable for surface modification and high amounts of drug loading if the transition temperature was enhanced to room temperature properly.

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ID Code: 94608
Item Type: Journal Article
Refereed: Yes
DOI: 10.1063/1.4890506
ISSN: 1089-7550
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 AIP Publishing LLC
Deposited On: 08 Apr 2016 05:53
Last Modified: 14 Apr 2016 04:09

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