Novel directions in nanosensing: scanning probe microscopy without a tip, magnetic resonance tomography at the nanoscale, and label-free imaging of action potentials

报告摘要：Magnetic field sensors made from diamond have revolutionized many areas of research, enabling for example nanoscale imaging of magnetic phases and nuclear magnetic resonance spectroscopy on single biomolecules. Yet, many outstanding problems remain unsolved. Notably, many techniques in the field are technically complex, confining work to only a few laboraties in the world. I will report on three recent results of our laboratory to address this and other problems.
One stream of work concerns a radically simplified scanning probe microscope, which obviates the need for nanofabricated tips and instead enables scanning probe imaging with planar extended samples like a bulk diamond.
Another stream of work concerns magnetic resonance tomography at the nanoscale, where we have recently demonstrated a three-dimensional imaging device with sub-10 nm spatial resolution.
Finally, I will present results on label-free imaging of action potentials in electrically active cells, where interferometric microscopy is employed to detect membrane motion events associated with action potentials without the use of voltage or calcium labeling.
报告人简介：Prof. Friedemann Reinhard is heading the quantum technology research group at the Institute of Physics and the Interdisciplinary Faculty of the University of Rostock, Germany [1]. His laboratory is working on nanoscale magnetic resonance spectroscopy using NV centers in diamond, biosensing, and scanning-probe imaging.
Prior to this position, he has been running an independent Emmy Noether research group at the Technical University of Munich, following an extended postdoctoral stay at the University of Stuttgart. He obtained a PhD from Université Pierre et Marie Curie Paris in 2009, and a diploma in physics from the Georg-August-Universität Göttingen in 2005.
[1] https://www.qt.physik.uni-rostock.de/en/