by Prof. Dr. Galina Kurlyandskaya, University of the Basque Country UPV-EHU
24.10.2019, 16:00 h, TF, Aquarium
Many traditional nanomaterials and composites are not suitable for the increasingly complex requirements of the fast-growing number of microsystems designed for environmental control,
biosensing, biomedical applications, drug delivery, national security and defense. The need for micro- and nanoscale sensors continues to challenge the materials science community to develop novel magnetic and composite materials. The principal requirements for a new generation of sensors are: high sensitivity, small size, low power consumption, stability, quick response, resistance to aggressive media, low price and operation by non-skilled personnel. Magnetic biosensors can be designed to take advantage of different types of magnetic effects such as magnetoresistance, Hall effect, giant magnetoimpedance (GMI). GMI offers the highest sensitivity with respect to applied magnetic field. The detection principles are measurements of resistance, impedance, etc. both without and in the presence of biocompatible magnetic nanoparticles. Magnetic particles in biosensors play a double role: they work as labels and as the carriers of the attached biological molecule. The improvement of the detection limit supposes not only the achievement of the optimal functional characteristics for each part of the device separately but also the development of pairs of best performance adapted to the conditions of the particular test.
In this talk, I plan to discuss:
- magnetic multilayers for small magnetic field sensing devices;
- electrophysical techniques for fabrication of large batches of nanoparticles for different composites;
- refer to magnetic composites for high frequency applications and to ferrogels as new biomimetic materials for biomedical applications;
- some examples of the available at our Labs measuring techniques for characterization of materials for high frequency applications;
- discuss some GMI sensor prototypes.