Nano ID

The nanostructured microparticles (supraparticles) can be structured to provide a specific spectral response to external magnetic excitation that contains an identifiable coding similar to a fingerprint. The iron oxide nanoparticles, wet-chemically produced for this purpose, are ecologically and economically viable building blocks for these supraparticles.

They can be added as a fine powder to plastics or adhesives and thus identify batch, material or product. This is not externally visible and cannot be destroyed.

Magnetic particle spectroscopy (MPS) technology can be used to read out the properties of magnetic markings on products. This allows marked raw materials as well as goods to be clearly traced or identified via international supply chains. This helps in quality assurance as well as in sorting or recycling.

The Nano-ID technology is being developed in the Magnetic Resonance and X-Ray Imaging (MRB) department in Würzburg in close cooperation with the working group of Prof. Karl Mandel (Fraunhofer ISC and FAU).

Figure 1: Fraunhofer MPS device with wired dual handheld sensor for surfaces and tubes.