| 13 Jun 2019 |
Concert of magnetic moments
Jülich, 13 June 2019 – An international collaboration between researchers from Germany, the Netherlands, and South Korea has uncovered a new way how the electron spins in layered materials can interact. In their publication in the journal Nature Materials, the scientists report a hitherto unknown chiral coupling that is active over relatively long distances.
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D.-S. Han et al.
Long-range chiral exchange interaction in synthetic antiferromagnets
Nature Materials (2019), https://doi.org/10.1038/s41563-019-0370-z
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| 12 Jun 2019 |
New Quantum Dot Microscope Shows Electric Potentials of Individual Atoms
Jülich, 11. June 2019 – A team of researchers from Jülich in cooperation with the University of Magdeburg has developed a new method to measure the electric potentials of a sample at atomic accuracy. Using conventional methods, it was virtually impossible until now to quantitatively record the electric potentials that occur in the immediate vicinity of individual molecules or atoms.
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Quantitative imaging of electric surface potentials with single-atom sensitivity
Christian Wagner, Matthew. F. B. Green, Michael Maiworm, Philipp Leinen, Taner Esat, Nicola Ferri, Niklas Friedrich, Rolf Findeisen, Alexandre Tkatchenko, Ruslan Temirov, F. Stefan Tautz
Nature Materials (published online 10 June 2019), DOI: 10.1038/s41563-019-0382-8
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| 18 Apr 2019 |
Microscopic Protective Covering for Better Batteries
Jülich/Seoul, 18 April 2019 – Lithium-ion batteries are far superior to other rechargeable battery systems due to their long lifetime and high energy density. However, for many applications, such as electric cars, they still fall short of the mark. One of the reasons for this is the cathode material of these batteries. Scientists from Jülich and South Korea are conducting research on a material that could make the batteries more powerful in future.
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Originalpublikation: Microstructure‐Controlled Ni‐Rich Cathode Material by Microscale Compositional Partition for Next‐Generation Electric Vehicles, by Un‐Hyuck Kim, Hoon‐Hee Ryu, Jae‐Hyung Kim, Robert Mücke, Payam Kaghazchi, Chong S. Yoon, Yang‐Kook Sun, Advanced Energy Materials, Februar 2019, DOI: 10.1002/aenm.201803902
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| 20 Mar 2019 |
New Method for Separating Rigid and Flexible Blood Cells
Jülich, 12 March 2019 – Scientists from Forschungszentrum Jülich have developed a new method for measuring the elasticity of red blood cells. This elasticity – along with many other cell properties – is considered an important biomarker. Various diseases such as sickle-cell anaemia, malaria, or diabetes are associated with an increasing rigidity of red blood cells. This rigidity is an indicator of the presence and progression of the disease. The disc-shaped red blood cells are usually very flexible and change their shape frequently. This permits them to penetrate even the smallest blood vessels in order to provide oxygen.
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Sharp-edged geometric obstacles in microfluidics promote deformability-based sorting of cells
Zunmin Zhang, Wei Chien, Ewan Henry, Dmitry A. Fedosov, and Gerhard Gompper
Phys. Rev. Fluids 4, 024201 (published 13 February 2019), DOI: 10.1103/PhysRevFluids.4.024201
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| 14 Mar 2019 |
Diattenuation Imaging – A promising imaging technique for brain research
Jülich, 19 March 2019 – A new imaging method provides structural information about brain tissue that was previously difficult to access. Diattenuation Imaging (DI), developed by scientists at Forschungszentrum Jülich and the University of Groningen, allows to differentiate, e.g., regions with many thin nerve fibres from regions with few thick nerve fibres. With current imaging methods, these tissue types cannot easily be distinguished.
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Menzel M, Axer M, Amunts K, De Raedt H, Michielsen K.
Diattenuation Imaging reveals different brain tissue properties.
Sci Rep. 2019;9:1939 (published 2019 Feb 13), DOI: 10.1038/s41598-019-38506-w
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| 07 Mar 2019 |
Thermoelectric efficiency of quantum dots now characterizable
Thermoelectric materials can convert temperature differences into electrical energy and vice versa. In nanodimensions, they are potentially useful for applications such as cooling microchips, or improving their energy efficiency in the form of nanoscale thermoelectric generators.
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B. Dutta, D. Majidi, A. Garcia Corral, P. Erdman, S. Florens, T. A. Costi, H. Courtois, C. B. Winkelmann;
Direct Probe of the Seebeck Coefficient in a Kondo-Correlated Single-Quantum-Dot Transistor;
Nano Lett., 2019, 19 (1), pp 506–511, DOI: 10.1021/acs.nanolett.8b04398
T. A. Costi and V. Zlatic;
Thermoelectric transport through strongly correlated quantum dots;
Phys. Rev. B81, 235127 (2010), DOI: 10.1103/PhysRevB.81.235127
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| 27 Feb 2019 |
Sperm at a Slant
Jülich, 27 February 2019 – Scientists from Forschungszentrum Jülich have used a supercomputer to simulate how sperm swim through tiny channels. Their model explains why most sperm cells move along walls at a tilted angle, head first. This movement enables the sperm to travel past slight bends. The researchers’ calculations have now shown that the precise point at which the sperm break contact with the wall is determined by their flagellar beat.
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Sperm motility in modulated microchannels
Sebastian Rode, Jens Elgeti and Gerhard Gompper
New J. Phys.21(2019)013016, DOI: 10.1088/1367-2630/aaf544
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