Magnetic nanoparticle-based hydrogels as reliable platforms to investigate magnetic interactions

authored by: I. Morales, A. Koch, C. Wesemann, R. T. Graf, N. C. Bigall
Abstract: In this work we design and synthesize magnetic nanoparticle-based hydrogels in which the inter-particle dipolar interactions can be tailored within the networks. These emerging materials combine the porosity and high surface area characteristic of gels with the nanoscopic magnetic properties of the building blocks, all in one macroscopic material. The synthesis of self-supported magnetic nanocrystal-based hydrogels is done through an amphiphilic overcoating and gelation procedure. The control over the dipolar interactions within the nanoparticles and aggregates forming the hydrogel network is achieved by changing the length of the hydrophobic side chain of the amphiphilic polymer used to coat and water transfer the nanoparticles. A scale-up approach of the overcoating procedure is presented. As well, we demonstrate that these systems are very useful to study, understand and easily tailor the magnetic interactions between particles or aggregates, in a more controlled and reliable way than in the nanoparticle colloids.
Organisation(s): Institute of Inorganic Chemistry
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Institute of Physical Chemistry and Electrochemistry
Laboratory of Nano and Quantum Engineering
External Organisation(s): Universität Hamburg
Type: Article
Journal: NANOSCALE
No. of pages: 11
ISSN: 2040-3364
Publication date: 28.01.2025
Publication status: E-pub ahead of print
Peer reviewed: Yes
ASJC Scopus subject areas: General Materials Science
Electronic version(s): https://doi.org/10.1039/d4nr04286g (Access: Open)

BibTeX

@article{bf8d3650106349628127c228f6453897,
title = "Magnetic nanoparticle-based hydrogels as reliable platforms to investigate magnetic interactions",
abstract = "In this work we design and synthesize magnetic nanoparticle-based hydrogels in which the inter-particle dipolar interactions can be tailored within the networks. These emerging materials combine the porosity and high surface area characteristic of gels with the nanoscopic magnetic properties of the building blocks, all in one macroscopic material. The synthesis of self-supported magnetic nanocrystal-based hydrogels is done through an amphiphilic overcoating and gelation procedure. The control over the dipolar interactions within the nanoparticles and aggregates forming the hydrogel network is achieved by changing the length of the hydrophobic side chain of the amphiphilic polymer used to coat and water transfer the nanoparticles. A scale-up approach of the overcoating procedure is presented. As well, we demonstrate that these systems are very useful to study, understand and easily tailor the magnetic interactions between particles or aggregates, in a more controlled and reliable way than in the nanoparticle colloids.",
author = "I. Morales and A. Koch and C. Wesemann and Graf, {R. T.} and Bigall, {N. C.}",
note = "Publisher Copyright: {\textcopyright} 2025 The Royal Society of Chemistry.",
year = "2025",
month = jan,
day = "28",
doi = "10.1039/d4nr04286g",
language = "English",
journal = "NANOSCALE",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
}