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Peter Grünberg Institute / Institute of Complex Systems
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Magnetic Field Sensors

We develop superconducting quantum interference devices (SQUID) as ultra-sensitive magnetic sensors for biomedical sensing. Our focus is put on applications of high-Tc SQUIDs for low field nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI), on magnetic nanoparticle detection and on biomagnetism.

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SQUIDs and Readout Electronics

Ultra-sensitive superconducting quantum interference devices (SQUID) and suitable readout electronics are developed. We are mainly working on high temperature superconductor SQUIDs which simply require liquid nitrogen cooling.

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Low-field NMR and MRI

Low-Field NMR and MRI

Nuclear magnetic resonance at low magnetic field is a very promising technique for analyzing the structure of molecules. At low field, the coupling of nuclei can be favorably studied. We are working towards low field MRI for diagnostic purposes. The use of magnetic nanoparticles as contrast agents is examined.

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Magnetic nanoparticle sensing

Magnetic Nanoparticle Sensing

Magnetic nanoparticles are synthesized using the thermal decomposition technique. Our research is aimed at developing magnetic assays for sensitive detection of proteins and viruses using our SQUID sensors. Magnetic markers can be applied for actuation as well as for detection.

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Magnetocardiography

Magnetocardiography

Magnetocardiography is a powerful technique to measure the electrophysiological processes of the human heart beat. Even the extremely weak magnetic signals of unborn babies can be detected in a real-time measurement above the mother's womb.

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