Magnetically "Programming" Cobalt-Doped Iron Oxide Nanoparticles for Localized Induction Heating Triggering a Collective Effect of Magnetic Moment Alignment on Demand

Magnetically "Programming" Cobalt-Doped Iron Oxide Nanoparticles for Localized Induction Heating : Triggering a Collective Effect of Magnetic Moment Alignment on Demand

© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 40 vom: 01. Okt., Seite e07158
Auteur principal: Raczka, Theodor (Auteur)
Autres auteurs: Luthardt, Leoni, Müssig, Stephan, Kent, Noah, Lan, Qianqian, Denneulin, Thibaud, Dunin-Borkowski, Rafal E, Mandel, Karl
Format: Article en ligne
Langue:English
Publié: 2025
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article debonding on demand induction heating iron oxide nanoparticles magnetic moment alignment magnetic programming
Description
Résumé:© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
Induction heating, a contactless and efficient method for generating heat via alternating magnetic fields (AMFs), has evolved from simple thermal applications to precise process control in fields like catalysis, self-healing, and debonding. Magnetic nanoparticles (NPs) play a key role as heat mediators, with heating properties adjustable via composition, size, and interactions. However, spatially precise heat control remains challenging. Current strategies rely on external AMF adjustments or material modifications, but lack an inherent mechanism to predefine which particles or regions will be activated for induction heating, limiting applicability in structured materials or complex environments. Here, it is shown that pre-magnetizing cobalt-doped iron oxide NPs with a static magnetic field irreversibly enhances their heating rates by up to a factor of 40. This process permanently alters their magnetic properties, enabling selective heating independent of AMF modulation. The extent of activation scales with cobalt content, introducing a material-intrinsic thermal switch. Furthermore, assembling these NPs into supraparticles facilitates integration into functional materials. By enabling spatially resolved and selective heat generation, this strategy advances the control of induction heating at the material level. It opens new possibilities for on-demand, pre-programmable, spatially resolved thermal activation in composite materials, smart adhesives, and targeted energy delivery in complex systems
Description:Date Revised 11.10.2025
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202507158