TY - JOUR

T1 - Water Transfer of Magnetic Nanoparticles with Different Morphologies by Means of a Ligand Exchange Reaction with a Short-Chained Catechol Derivate

AU - Wesemann, Christoph

AU - Klimke, Stephen

AU - Lübkemann-Warwas, Franziska

AU - Tran, Kevin

AU - Borg, Hadir

AU - Schoske, Larissa

AU - Renz, Franz

AU - Bigall, Nadja C.

N1 - Funding Information: N.C.B. would like to thank the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) for funding under Germany’s excellence strategy within the cluster of excellence PhoenixD (EXC2122, projectID 390833453). N.C.B. is also grateful for financial support of the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG, Projects BI 1708/4-1, INST 187/782-1 and INST 187/789-1). L.S. and H.B. express thanks for the support from the cluster of excellence PhoenixD. K.T. is thankful for the support from the Hannover School for Nanotechnology (HSN). The authors thank the Laboratory of Nano and Quantum Engineering (LNQE) for providing the TEM and Mössbauer facility. The whole team of authors also thanks Prof. Armin Feldhoff for access to the XRD device.

PY - 2022/12/15

Y1 - 2022/12/15

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85143414081&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.2c06162

DO - 10.1021/acs.jpcc.2c06162

M3 - Article

VL - 126

SP - 21050

EP - 21060

JO - The Journal of Physical Chemistry C

JF - The Journal of Physical Chemistry C

SN - 1932-7455

IS - 49

ER -