Scientific Highlights

11 mars 2020
Teaser Nanowelten in 3-D

Des nanomondes en 3D

Matière et matériaux Recherche sur les matériaux Recherche avec la lumière synchrotron

Des images tomographiques de l’intérieur de fossiles, de cellules cérébrales et de puces informatiques fournissent des éléments de connaissance sur leurs structures les plus fines. Ce sont les rayons X de la Source de Lumière Suisse SLS qui permettent de réussir ces images en 3D grâce à des instruments ultra-modernes, des détecteurs développés au PSI et des algorithmes informatiques sophistiqués.

En savoir plus
24 février 2020
Teaser Donnelly Guizarsicairos

Court-métrage d’un nano-tourbillon magnétique

Communiqués de presse Matière et matériaux Recherche sur les matériaux Recherche avec la lumière synchrotron

Des chercheurs ont développé une nouvelle méthode d’analyse qui leur a permis de visualiser la structure magnétique à l’intérieur d’un matériau à l’échelle du nanomètre. Ils ont réussi à réaliser un petit «film» de sept images qui montre pour la première fois en 3D les changements que de minuscules tourbillons magnétiques subissent au cœur du matériau.

En savoir plus
7 octobre 2019
laminography chip

3D imaging for planar samples with zooming

Researchers of the Paul Scherrer Institut have previously generated 3-D images of a commercially available computer chip. This was achieved using a high-resolution tomography method. Now they extended their imaging approach to a so-called laminography geometry to remove the requirement of preparing isolated samples, also enabling imaging at various magnification. For ptychographic X-ray laminography (PyXL) a new instrument was developed and built, and new data reconstruction algorithms were implemented to align the projections and reconstruct a 3D dataset. The new capabilities were demonstrated by imaging a 16 nm FinFET integrated circuit at 18.9 nm 3D resolution at the Swiss Light Source. The results are reported in the latest edition of the journal Nature Electronics. The imaging technique is not limited to integrated circuits, but can be used for high-resolution 3D imaging of flat extended samples. Thus the researchers start now to exploit other areas of science ranging from biology to magnetism.

En savoir plus
24 juillet 2019
WAXS and radiography images of six samples at different glucose concentration

Glycation of collagen in decellularized pericardium tissue: pilot study

Aging populations and diabetics suffer from the effects of the glycation of collagen, the non-enzymatic formation of glucose bridges. While the secondary effects have been studied intensely, comparatively little is known on the direct effect of glycation on the structure of collagen. It has been demonstrated in this study, that the direct impact of glycation can be determined with sub-atomic precision, and that a model system based on abundantly available connective tissue of farm animals can be used for such studies. This opens new avenues for inspecting the effects of diabetes mellitus on connective tissues and the influence of therapies on the resulting secondary disorders.

En savoir plus
1 avril 2019
2019 HERCULES.png

HERCULES school 2019 at SLS

In the week of April 1-5 PSI welcomes 20 PhD students and postdocs taking part in the European HERCULES 2019 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.

En savoir plus
27 mars 2019
inside batteries

Inside Batteries

Lithium ion batteries (LIB) are essential in modern everyday life, with increasing interest in enhancing their performance and lifetime. Secondary particles of Li-rich cathode material were examined with correlated ptychographic X-ray tomography and diffraction microscopy at different stages of cycling to probe the aging mechanism.

En savoir plus
6 mars 2019
Micro- and nano-calcifications as well as collagen, elastin and myofilament have been mapped using scanning SAXS and WAXS

Insights into a well-known disease in ageing populations: Abdominal and popliteal aneurysm

Abdominal aortic aneurysm, an enlargement of the abdominal aorta, may lead to rupture and thus acute health issues and death. Scanning X-ray imaging enabled new insights in the nano-structure of calcifications associated with abdonimal and popliteal aneurysm and allowed mapping the distribution of nano- and micro-calcifications as well as of collagen, elastin and myofilament as building blocks of connective tissue across samples from human donors.

En savoir plus
1 février 2019

Une lentille virtuelle améliore la microscopie à rayons X

Communiqués de presse Matière et matériaux Recherche avec la lumière synchrotron

Une nouvelle méthode développée par des chercheurs du PSI permet d’améliorer encore les radiographies de matériaux. Pour ce faire, les chercheurs ont déplacé une lentille optique et réalisé chaque fois une image individuelle. A partir de là, ils ont calculé une image globale à l’aide d’algorithmes informatiques.

En savoir plus