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Fingerprint signatures based on nanomagnets as markers in materials for tracing and counterfeit protection

: Szielasko, Klaus; Youssef, Amir; Sporn, Dieter; Mandel, Karl


Journal of nanoparticle research 18 (2016), Nr.5, Art. 131
ISSN: 1388-0764
ISSN: 1572-896X
Fraunhofer ISC ()
Fraunhofer IZFP ()
Fingerprint; counterfeit protection; Superparamagnetism; Nanomagnets; GMR; marker

Identification and tracing of objects is a challenge of great current importance. Ideally, this can be achieved via small markers, which equip an object with a fingerprint identity. Herein, we communicate an approach that is based on structural arrangements of magnetic nano-entities to generate a kind of security key in an object. The nano-markers, which are applied as inks, can remotely be read out in a fast and simple way with a GMR sensor and yield an unmistakable signal pattern.