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Updated: Sep 13, 2025
07:01
Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
Published on: June 9, 2016
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Information-Providing Magnetic Supraparticles: Particle Designs to Record Environmental Stimuli with Readout by
Stephan Müssig1,2, Andreas Wolf1,3,2, Tero Kämäräinen1,2
1Department of Chemistry and Pharmacy, Professorship for Inorganic Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany.
Accounts of Materials Research
|July 31, 2025
Summary
Magnetic supraparticles (SPs) offer a novel approach to "materials intelligence" by recording environmental stimuli. These magnetic particles enable nondestructive, on-site analysis for predictive maintenance and recycling.
Area of Science:
- Materials Science
- Nanotechnology
- Spectroscopy
Background:
- Gathering material information (origin, properties, environmental history) is crucial for quality control, predictive maintenance, and recycling.
- Current methods like luminescent markers or DNA sequences have limitations (e.g., surface-level analysis).
- Magnetic fields offer non-destructive analysis, penetrating opaque materials, but traditional methods (MRI) are unsuitable for macroscopic objects.
Purpose of the Study:
- To present supraparticle (SP) design concepts for recording and reporting environmental stimuli using magnetic particle spectroscopy (MPS).
- To explore the potential of SPs for creating "materials intelligence" through stimulus-induced spectral magnetic signal changes.
- To discuss the integration of SPs into macroscopic objects for applications like predictive maintenance and industrial digitization.
Main Methods:
- Utilized magnetic particle spectroscopy (MPS) for characterization of magnetic nanoparticles and supraparticles (SPs).
- Designed SPs with signal-transducing magnetic nanoparticles and non-magnetic sensitizer materials responsive to environmental stimuli (temperature, moisture, UV, gases).
- Investigated large-scale SP structure formation and its implications for integration into macroscopic objects.
Main Results:
- Demonstrated that SPs can provide information on environmental stimuli through irreversible spectral magnetic signal changes detected by MPS.
- Showcased the advantages of combining magnetic nanoparticles with stimulus-responsive non-magnetic materials within SPs.
- Observed pronounced millimeter-scale SP structure formation through interacting SPs, relevant for macroscopic integration.
Conclusions:
- Magnetic supraparticles offer a versatile platform for developing 'materials intelligence' by recording environmental stimuli.
- Understanding the interplay between nanoparticle, SP, and macroscopic object levels is critical for accurate MPS interpretation and application.
- SPs hold significant potential for transforming passive materials into information-providing systems for advanced industrial applications.
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