Water Transfer of Magnetic Nanoparticles with Different Morphologies by Means of a Ligand Exchange Reaction with a Short-Chained Catechol Derivate

verfasst von

Christoph Wesemann, Stephen Klimke, Franziska Lübkemann-Warwas, Kevin Tran, Hadir Borg, Larissa Schoske, Franz Renz, Nadja C. Bigall

Abstract

For many applications of magnetic nanoparticles, the material must be dispersed in water. Therefore, this study used a two-phase system to transfer iron oxide ((γ-Fe2O3 and Fe3O4) and iron platinum (FePt) nanoparticles to aqueous solution, using a low molecular weight catechol derivate (nitroDOPA). The monodisperse nanoparticles were synthesized in spherical and cubic shapes through high boiling point heat-up synthesis approaches followed by the phase transfer step. The colloidal nanoparticle solutions were investigated through infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and magnetometry measurements, giving a broad overview over the influence of the new catechol-ligand shell. It is shown that the nitroDOPA molecules bind through their catechol group on the surface of the magnetic nanoparticles, resulting in stable hydrophilic solutions under basic conditions. The physical properties of the magnetic nanoparticles were not altered by the ligand exchange reaction.

Organisationseinheit(en)

AG Funktionale Nanostrukturen aus assemblierten kolloidalen Nanopartikeln
AG Anorganische Koordinationschemie
Institut für Physikalische Chemie und Elektrochemie
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Institut für Anorganische Chemie
Hannover School for Nanotechnology

Typ

Artikel

Journal

The Journal of Physical Chemistry C

Band

126

Seiten

21050–21060

Anzahl der Seiten

11

Publikationsdatum

15.12.2022

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

Elektronische Version(en)

https://doi.org/10.1021/acs.jpcc.2c06162 (Zugang: Geschlossen)