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Dieser Inhalt ist nicht auf Deutsch verfügbar.News & Scientific Highlights
HERCULES at the Swiss Light Source
In the week of March 18-23 PSI welcomes 20 PhD students and postdocs taking part in the HERCULES 2018 school on Neutron and Synchrotron Radiation. They will attend lectures and perform two days of practical courses at several beam lines of the Swiss Light Source.
Making the world go round - a look into the structure of a prominent heterogeneous catalyst
Fluid catalytic cracking catalysts, which are composite particles of hierarchical porosity, were examined using ptychographic X-ray tomography. These particles are essential to the conversion of crude oil into gasoline. Examination of catalysts at decreasing levels of catalytic conversion efficacy allowed the detection of possible deactivation causes.
Swiss Neutron Scattering Prize
Viviane Lutz-Bueno was awarded the Swiss Neutron Scattering Prize of the Swiss Neutron Scattering Society, at the Joint Annual Meeting of the Swiss and Austrian Physical Society, for her PhD thesis Effects of formulation and flow on the structure of micellar aggregates carried out at ETH Zürich. Viviane is currently a postdoctoral fellow at the CXS group at PSI, developing scanning SAXS analysis methods.
Tauchgang in einen Magneten
Zum ersten Mal haben Forschende die Richtungen der Magnetisierung in einem dreidimensionalen magnetischen Objekt sichtbar gemacht. Die kleinsten Details in ihrer Visualisierung waren dabei zehntausend Mal kleiner als ein Millimeter. In der sichtbar gemachten magnetischen Struktur stach eine Art von Muster besonders hervor: magnetische Singularitäten namens Bloch-Punkte, die bisher nur in der Theorie bekannt waren.
Photonic structure of white beetle wing scales: optimized by evolution
A very thin layer on this beetle’s wings exhibits a complicated structure on the nanoscale that gives them a bright white color. X-ray nanotomography acquired at the Swiss Light Source provides a faithful image of this structure in three dimensions with which scientists can confirm its evolutionary optimization: just enough material for an efficient reflection of white light.
European NESY Winterschool Young Scientist Best Poster Prize
Klaus Wakonig was awarded the "Young Scientist Best Poster Prize" along with a cash prize at the 10th European NESY Winterschool & Symposium on Neutron and Synchrotron Radiation. Klaus is a PhD student at the coherent X-ray scattering group (CXS) in PSI. His poster, entitled "X-ray Fourier ptychography," details his latest results in the implementation of Fourier ptychography at X-ray wavelengths for nanoimaging. Image credit ©NESY/Montanuniversitaet Leoben
3-D-Röntgenbild macht feinste Details eines Computerchips sichtbar
Forschende des PSI haben detaillierte 3-D-Röntgenbilder eines handelsüblichen Computerchips erstellt. In ihrem Experiment haben sie ein kleines Stück aus dem Chip untersucht, das sie zuvor herausgeschnitten hatten. Diese Probe blieb dabei während der Messung unbeschädigt. Für Hersteller ist es eine grosse Herausforderung, zu bestimmen, ob der Aufbau ihrer Chips am Ende den Vorgaben entspricht. Somit stellen diese Ergebnisse eine wichtige Anwendung eines Röntgen-Tomografieverfahrens dar, das die PSI-Forschenden seit einigen Jahren entwickeln.
Interlaced zone plates push the resolution limit in x-ray microscopy
A novel type of diffractive lenses based on interlaced structures enable x-ray imaging at resolutions below 10 nm. The fabrication method and the test results of these novel x-ray lenses have been published in the journal Scientific Reports.
How does food look like on the nanoscale?
The answer to this question could save food industry a lot of money and reduce food waste caused by faulty production. Researchers from the University of Copenhagen and the Paul Scherrer Institut have obtained a 3D image of food on the nanoscale using ptychographic X-ray computed tomography. This work paves the way towards a more detailed knowledge of the structure of complex food systems.