Notifications on selected papers
Here we provide an overview of selected papers by Jülich scientists that have been published in journals. These notifications comprise a brief summary as well as data regarding the publication. An RSS Newsfeed has also been created for the notifications.
Search results 1 to 7 from a total of 20
Date |
Content |
Originalpublikation |
|---|---|---|
| 17 Jul 2017 | RASER: Ultraprecise Nuclear Magnetic Resonance Spectroscopy Making Use of Parahydrogen
Jülich, 17 July 2017 – Scientists from Forschungszentrum Jülich and RWTH Aachen University have discovered a phenomenon similar to the laser effect with which the structure of organic molecules can be examined at previously unmatched levels of precision. In contrast to a laser, this "raser" (radiowave amplification by stimulated emission of radiation) is pumped with parahydrogen and does not operate at light frequencies, instead oscillating continuously at various radio frequencies of around 100 kHz. A precise fingerprint of the molecular structure can thus be obtained.
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Para-hydrogen raser delivers sub-millihertz resolution in nuclear magnetic resonance |
| 14 Jul 2017 | "Science": Using Neutrons for Switchable Antiferromagnets
Jülich, 14 July 2017 – In the journal Science, a Chinese–German team of researchers has presented a novel synthetic antiferromagnetic material which may prove pioneering for progress in nanomedicine and information technology. Up until now, synthetic antiferromagnets have been manufactured primarily from transition metals and alloys. The scientists from the University of Science and Technology of China in Hefei manufactured a different kind of antiferromagnet consisting of several oxide layers only a few nanometres thick, whose properties can be adapted to various applications in a targeted manner. In collaboration with Forschungszentrum Jülich, the researchers used neutron measurements at Heinz Maier-Leibnitz Zentrum (MLZ) to show that the individual layers of the new material can be magnetized and their polarity reversed – meaning that the magnetic states can be switched in a controlled fashion.
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All-oxide-based synthetic antiferromagnets exhibiting layer-resolved magnetization reversal |
| 13 Jul 2017 | Smart Materials for Extreme Conditions
Jülich, 13 July 2017 – The inside walls of future fusion reactors will be exposed to extreme heat flux densities. Tungsten is currently regarded as the preferred wall material, in part due to its high melting point. However, problems with the material include its brittleness and its high rate of oxidation. A solution to these problems could be the new, smart material concepts based on tungsten that scientists at Forschungszentrum Jülich have developed together with national and international partners.
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A. Litnovsky , T. Wegener, F. Klein, Ch. Linsmeier, M. Rasinski, A. Kreter, B. Unterberg, M. Vogel, S. Kraus, U. Breuer, C. Garcia-Rosales , A. Calvo und N. Orda |
| 08 Jun 2017 | From Droplet to Crystal – X-Ray Scattering Shows Crystal Formation in 3D
Jülich, 8 June 2017 – A suprisingly simple drop casting method makes it possible to produce thin layers with novel properties that are required, for example, in solar cells, computer chips, or in constructing sensors and detectors. An international research team has observed how the iron oxide nanoparticles join together to form an ordered crystal. These types of magnetic nanoparticles are particularly interesting for applications in high-density storage media and new approaches to cancer therapy that are still under development.
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Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly |
| 22 May 2017 | Quasicrystals Made of Fullerenes
Jülich, 22 May 2017 – For about 35 years now, researchers have been fascinated by a new class of materials – quasicrystals, the discovery of which was marked by a Nobel Prize in 2011. For a long time, they were only found in ternary alloys. They were subsequently found in other systems. Scientists at Forschungszentrum Jülich have now discovered another class of quasicrystals and by using computer simulations they have explained the reasons for the special arrangement of the molecules.
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M. Paßens, V. Caciuc, N. Atodiresei, M. Feuerbacher, M. Moors, R.E. Dunin-Borkowski, S. Blügel, R. Waser, S. Karthäuser |
| 09 May 2017 | Shape determines properties
Jülich, 10 May 2017 – A team of researchers from Jülich and Potsdam has for the first time produced monodisperse mesocrystals, which behave magnetically like single crystals, from a magnetic material known as magnetite. "Monodisperse" means that the particles created are all of the same size; in this example, 40 nanometres. Mesocrystals are crystals made up of nanocrystals, in this case of superparamagnetic magnetite. The particles can now be used as a model system to improve the fields of application of magnetite particles.
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Single crystalline superstructured stable single domain magnetite nanoparticles |
| 27 Apr 2017 | Smaller Particles Not Always Faster
Jülich, 27 April 2017 – The smaller the object, the faster it disperses in its environment: take for example fine grains of sand and rough gravel in the river, or small crumbs and a loaf of bread on the kitchen table. The same behaviour can be seen with microscopically small particles which – excited by surrounding molecules – are distributed through space in the course of time. In 1905, Albert Einstein was able to provide evidence demonstrating that the speed of this Brownian motion is inversely proportional to the radius of a particle, that is to say its size. Scientists from Forschungszentrum Jülich, KU Leuven, and the CRPP research centre in Bordeaux have now discovered an exception to this rule. For their experiments, they used a lamellar system in which the large particles are more mobile than the small ones.
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Fast Diffusion of Long Guest Rods in a Lamellar Phase of Short Host Particles |
