Formation of Fe(III)-phosphonate Coatings on Barium Hexaferrite Nanoplatelets for Porous Nanomagnets

@article{Lisjak2020FormationOF,
  title={Formation of Fe(III)-phosphonate Coatings on Barium Hexaferrite Nanoplatelets for Porous Nanomagnets},
  author={Darja Lisjak and Patricija Hribar Bo{\vs}tjan{\vc}i{\vc} and Alenka Mertelj and Andra{\vz} Mavri{\vc} and Matja{\vz} Valant and Janez Kova{\vc} and H. Hudelja and Andra{\vz} Kocjan and Darko Makovec},
  journal={ACS Omega},
  year={2020},
  volume={5},
  pages={14086 - 14095}
}
Amorphous coatings formed with mono-, di-, and tetra-phosphonic acids on barium hexaferrite (BHF) nanoplatelets using various synthesis conditions. The coatings, synthesized in water with di- or tetra-phosphonic acids, were thicker than that could be expected from the ligand size and the surface coverage, as determined by thermogravimetric analysis. Here, we propose a mechanism for coating formation based on direct evidence of the surface dissolution/precipitation of the BHF nanoplatelets. The… Expand
3 Citations
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References

SHOWING 1-10 OF 45 REFERENCES
Modification of Nanocrystalline TiO2 with Phosphonate‐ and Bis(phosphonate)‐Bearing Macrocyclic Complexes: Sorption and Stability Studies
The first systematic study of chemical adsorption/desorption of phosphonic acid and geminal bis(phosphonic acid) on/from the surface of anatase nanoparticles is reported. Stable TiO2 colloidalExpand
Self-Assembled Monolayers of Alkanesulfonic and -phosphonic Acids on Amorphous Iron Oxide Nanoparticles
We have functionalized amorphous Fe2O3 nanoparticles with alkanesulfonic and octadecanephosphonic acids. TEM reveals nanoparticles 5−10 nm in diameter. FTIR spectra suggest that while in all casesExpand
Effect of chain length and electrical charge on properties of ammonium-bearing bisphosphonate-coated superparamagnetic iron oxide nanoparticles: formulation and physicochemical studies
Bisphosphonates BP molecules have shown to be efficient for coating superparamagnetic iron oxide particles. In order to clarify the respective roles of electrical charge and the length of theExpand
A functionalization strategy for the dispersion of permanently magnetic barium-hexaferrite nanoplatelets in complex biological media
Abstract In this paper we present a major advance in the colloidal stabilization of nanoparticles in complex biological media that is one of the ongoing challenges for the usage of nanoparticles inExpand
Incorporation of Sc into the structure of barium-hexaferrite nanoplatelets and its extraordinary finite-size effect on the magnetic properties
Abstract In this investigation we analyze an unprecedented difference in the behavior of nanoparticles when compared to the corresponding bulk. We have found that a chemical substitution can have theExpand
Effect of the Functionalization Process on the Colloidal, Magnetic Resonance Imaging, and Bioelimination Properties of Mono- or Bisphosphonate-Anchored Dendronized Iron Oxide Nanoparticles.
TLDR
All dendronized NPs display good in’vitro MRI properties and those obtained by direct exchange showed no cell internalization, an efficient in vivo MRI contrast enhancement, and elimination by both urinary and hepato-biliary ways. Expand
Enhancing the imaging and biosafety of upconversion nanoparticles through phosphonate coating.
TLDR
Phosphonate coating presents a safer design method that preserves and improves the bioimaging properties of UCNPs, thereby enhancing their biological use and preventing pro-inflammatory effects at the cellular level and in the intact lung. Expand
Multi-functional rare-earth hybrid layered networks: photoluminescence and catalysis studies
Hydrothermal reactions between rare-earth (RE) chloride salts and N-(carboxymethyl)iminodi(methylphosphonic acid) (H5cmp) led to the isolation of a series of layered networks formulated asExpand
Alkyl Phosphonate/Phosphate Coating on Magnetite Nanoparticles: A Comparison with Fatty Acids
Coated magnetite nanoparticles with a 6−8 nm average diameter were prepared. The surfactants used to stabilize the nanoparticles and disperse them in organic solvents were oleic acid (OA), lauricExpand
Self-Assembled Monolayers of Alkylphosphonic Acids on Metal Oxides
Dense, highly ordered monolayers can be prepared by the adsorption of octadecylphosphonic acid (ODPA) onto nonporous ZrO2, TiO2, and zirconated silica powders. ODPA reacts strongly with Al2O3 to formExpand
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