Am PSI widmen sich mehrere Projekte wichtigen Forschungsfragen rund um das Coronavirus Sars-CoV-2 und den daraus resultierenden Erkrankungen. Wir informieren über Aktivitäten und Vorhaben, zum Beispiel zu Untersuchungen von Lungengewebe, zur Produktion von Proteinen und Antikörpern oder über Ideen für neue Forschung zu Covid-19.
Nützliche Links
Die Berufsbildung erkundet die Stadt Aarau
Die Berufsbildnerinnen und Berufsbildner mit ihren Partnern und Partnerinnen besuchten am Freitag, 26. Juni Aarau.
Online ultrahigh resolution mass spectrometry for the molecular analysis of the atmosphere
Atmospheric aerosols are considered the single largest uncertainty in assessing the human contribution to global warming and amongst the top five health risks worldwide. Our ability to investigate aerosol sources, their formation processes in the gas-phase, and their societal impacts is largely governed by our capability to measure their molecular constituents in real-time. Researchers at PSI have combined for the first time ultrahigh resolution mass spectrometry with high time resolution and sensitivity for the molecular analysis of aerosols.
The dynamics of overlayer formation on catalyst nanoparticles and strong metal-support interaction
The strong metal support interaction has been investigated in situ by means of electron microscopy, XPS and XRD, to provide a complete overview about the interplay between the metal and the support.
VentureKick: PSI Fellow gewinnt 40'000 CHF
Der PSI Fellow Florian Döring (aus dem PSI Forschungsbereich «Photon Science») hat es mit seinem Spin-off XRnanotech GmbH in die zweite Runde von «Venture Kick» geschafft und erhält somit nicht nur eine finanzielle Unterstützung von 40'000 CHF, sondern auch Unterstützung beim Ausbau seines Netzwerks und Trainingsprogramme für Entrepreneurship.
A new etcher is just unpacked!
TOMCAT has a new etcher tool for the fabrication of very high aspect ratio gratings in silicon. The new SPTS Rapier system for silicon deep reactive ion etching just arrived and unpacked from the crate in front of the Laboratory of Micro and Nanotechnology at PSI! We thank the LMN technical staff for the support and the great job of moving in!
LENS Webinar on New Directions in Instrumentation
On June 25 the League of Advanced European Neutron Source LENS organized a second webinar on "New Directions in Instrumentation". Artur Glavic (LIN) gave a presentation on "Neutrons for Magnetic Nanostructures on Surfaces: Beyond the Specular Intensity Wars", which is still available online.
Microlithography: Science and Technology
The Third Edition of "Microlithography: Science and Technology" from Taylor & Francis covers the science and engineering involved in the latest generations of microlithography.
Thermal Control of Spin Excitations in the Coupled Ising-Chain Material RbCoCl3
We have used neutron spectroscopy to investigate the spin dynamics of the quantum (S=1/2) antiferromagnetic Ising chains in RbCoCl3. The structure and magnetic interactions in this material conspire to produce two magnetic phase transitions at low temperatures, presenting an ideal opportunity for thermal control of the chain environment. The high-resolution spectra we measure ...
Patente als Trumpf
John Millard leitet am PSI den Technologietransfer. In diesen Bereich fällt auch das Patentwesen. Im Gespräch erzählt er, wie das PSI sein Wissen mit Patenten schützt und dank seiner Patente die Zusammenarbeit mit der Industrie und anderen Forschungsinstituten noch stärker fördert.
Grosser Rat bewilligt 2,4 Millionen für Technologiezentrum Anaxam
Der Kanton Aargau unterstützt das Technologietransferzentrum Anaxam in Villigen für die Dauer von vier Jahren mit insgesamt 2,4 Millionen Franken. Der Grosse Rat hat am Dienstag in Spreitenbach den entsprechenden Kredit mit 124 zu 3 Stimmen bewilligt.
Phase boundary dynamics of bubble flow in a thick liquid metal layer under an applied magnetic field
We investigate argon bubble flow in liquid gallium within a container large enough to avoid wall effects. Flow with and without applied horizontal magnetic field is studied. We demonstrate the successful capture and quantification of the effects of applied magnetic field using dynamic neutron radiography and the previously developed and validated robust image processing pipeline, supported by the in silico reproduction of our experiment.
Fellow Award for Dr. Mantzaras
The prestigious Fellow Award “Fellow of The Combustion Institute” was allotted to Dr. Mantzaras for “Pioneering Experimental and Modeling Research in Hetero-/Homogeneous and Catalytic Combustion”. The combustion activities at LSM emphasize on non-intrusive laser-based measurements in a high-pressure optically accessible catalytic reactor, while the modeling activities encompass advanced multidimensional numerical simulations and theoretical work based on activation energy asymptotics.
Z3-vestigial nematic order due to superconducting fluctuations in the doped topological insulators NbxBi2Se3 and CuxBi2Se3
A state of matter with a multi-component order parameter can give rise to vestigial order. In the vestigial phase, the primary order is only partially melted, leaving a remaining symmetry breaking behind, an effect driven by strong classical or quantum fluctuations. Vestigial states due to primary spin and charge-density-wave order have been discussed in iron-based and cuprate materials. Here we present the observation of a partially melted superconductivity in which pairing fluctuations condense at a separate phase transition and form a nematic state with broken Z3, i.e., three-state Potts-model symmetry.
How to correct beam hardening effects in dual phase grating interferometry?
Researchers at the X-ray tomography group have expanded the theoretical understanding of dual phase grating interferometry with polychromatic sources. As a result, beam hardening effects can be corrected and a real space correlation function of a sample can be retrieved in dark-field imaging. These are significant steps towards application of the method for the quantitative investigation of microstructures of materials and devices using dual phase grating interferometry. The results of the work were published in Optics Express on June 12, 2020.
Mehr Rechenleistung für die Computer der Zukunft
Wissenschaftler des Paul Scherrer Instituts (PSI) und der ETH Zürich sind der Herstellung von Spintronic-Elementen auf der Basis von Prozessen, die in der CMOS-Mikrochip-Produktion eingesetzt werden, einen grossen Schritt näher gekommen. Sogenannte «Domain Wall Logic»-Schaltkreise können magnetische Informationen(Bits) direkt in der Schaltung speichern.
Eine solche Logik-in-Speichereinheit verliert keine Informationen und kann nach einem Stromausfall unmittelbar mit dem Prozess weiterfahren kann welcher zum Zeitpunkt des Stromausfalls lief. Dies ist äußerst vorteilhaft, wenn die Stromversorgung unzuverlässig ist oder ausgeschaltet wird, um Energie zu sparen - wie es bei vielen IoT-Anwendungen der Fall ist.
Das von den Professoren Gambardella und Heyderman geführte Team präsentierte einen funktionierenden Proof-of-Concept eines sog. "Adder" Schaltkreises auf Basis einer «Domain Wall Logic», der Speicher- und Logik-Vorgänge in einem einzigen Schaltkreis zusammenführt. Dies öffnet die Tür zu einer weiteren Steigerung der Rechenkapazität unserer Computer in der Zukunft.
Diffractometer stand built in collaboration with local SME
A light-weight, low-vibration diffractometer stand has been designed and produced in close collaboration with the local supplier Heinz Baumgartner AG. This component will be used in conjunction with a cryomagnet system to study quantum matter at the SwissFEL Bernina and Cristallina-Q endstations.
Unterstützung für Wissenschaftler weltweit im Kampf gegen COVID-19
Aus Anlass der aktuellen Coronavirus-Pandemie arbeiten Wissenschaftler weltweit in bisher ungekannten Ausmass zusammen, um mehr über das Virus zu lernen und mit diesem Wissen Impfstoffe sowie Therapeutika zu entwickeln. Zusammen mit wissenschaftlichen und industriellen Partnern wie dem Paul Scherrer Institut, hat unser Spin-off leadXpro eine Methode entwickelt, um Forschungs- und Entwicklungsinitiativen mit dem SARS-CoV-2 M-Protein zu versorgen. Dieses M-Protein, das ein wichtiger Bestandteil der Viruskapsel ist, stellt ein potenzielles Ziel für Medikamente gegen das Virus dar. Wir freuen uns, Interessierte, die das Protein erhalten möchten, einzuladen, sich mit leadXpro in Verbindung zu setzen.
Important information for SLS and SwissFEL users
Please find some relevant information on the following topics:
- COVID-19 call open until end of year 2020
- SLS back to 24/7 with external users on site
- Restart of user operation at SwissFEL
- Travel and safety considerations for your beamtime
- Remote access
Congratulations to Ling Fang
On 2 June 2020 Ling successfully defended her PhD entitled “Radiocarbon analysis of dissolved organic carbon from ice cores" at the University of Bern. This was the first time that a student from our lab defended online and Ling delivered a great performance. Congratulations! The project was conducted in collaboration with the Laboratory for the Analysis of Radiocarbon with AMS (LARA) of the University of Bern, Nanjing University, and the University of Maine, amongst others, and funded jointly by the University of Bern and the Paul Scherrer Institute.
Forschung mit Patent
Am PSI entwickeln Forschende innovative Technologien, neue biologische Wirkstoffe und präzisere Messinstrumente. Das bringt die Wissenschaft und die Schweizer Wirtschaft voran. Die besten Ideen werden mit Patenten geschützt und machen das PSI zum begehrten Partner für die Industrie.
Welcome Kevin Kilchhofer
We warmly welcome Kevin Kilchhofer as a PhD student in the Laboratory of Environmental Chemistry. He joined the Surface Chemistry group on 1 June 2020.
Kevin Kilchhofer studied Atmospheric and Climate Sciences at the ETH Zurich, with a focus on atmospheric chemistry and physics. For his master thesis, he investigated the impact of cloud processing on the ice nucleation ability of aerosol particles.
At PSI, Kevin Kilchhofer will investigate the feedbacks between photochemically induced peroxy radical chemistry and the evolution of composition in viscous secondary organic aerosol proxies using a suite of flow tube and aerosol mass spectrometry techniques, accompanied by radially resolved modelling of physical and chemical processes.
Membrane Lifetime Estimation in a Vanadium Redox Flow Battery using an Accelerated Stress Test
A vanadium redox flow battery (VRFB) is a grid-scale energy storage device. Its energy conversion unit consists of a cell stack that comprises ion-exchange membranes to separate positive and negative electrode. The projected lifetime of a VRFB is 20 years and 7’000 charge-discharge cycles. Lifetime tests of membranes under application relevant conditions are therefore impractical, and the development of an accelerated stress test (AST) to assess the chemical stability of membranes is crucial.
Zooming in on water splitting
Perovskite oxynitride materials can act as effective photocatalysts for water splitting driven by visible light. A combined neutron and x-ray study now provides unique insight into the underlying processes at the solid–liquid interface and highlights how solar-to-hydrogen conversion can be improved.
Zooming in on water splitting
Perovskite oxynitride materials can act as effective photocatalysts for water splitting driven by visible light. A combined neutron and x-ray study now provides unique insight into the underlying processes at the solid–liquid interface and highlights how solar-to-hydrogen conversion can be improved.
A miniaturized selective laser melting device for operando X-ray diffraction studies
We report on the development of a miniaturized device for operando X-ray diffraction during laser 3D printing. Its capabilities are demonstrated by ex situ printing of complex shapes and operando X-ray diffraction experiments using Ti-6Al-4V powder.
The Mu3e collaboration grieves for Sig Martin
We lost a very good friend and an important consultant for the design and construction of the magnet for our experiment.
Influence of thermo-mechanical history on the ordering kinetics in 18 carat Au alloys
In situ high-energy synchrotron X-ray diffraction experiments in combination with electron microscopy observations reveal the influence of the thermo-mechanical history and chemical composition on the ordering kinetics during isochronal heating of 18 karat Au alloys.
Mechanismus einer lichtgetriebenen Natriumpumpe aufgeklärt
Forschenden des Paul Scherrer Instituts PSI ist es erstmals gelungen, eine lichtgetriebene Natriumpumpe von Bakterienzellen in Aktion aufzunehmen. Die Erkenntnisse versprechen Fortschritte bei der Entwicklung von neuen Methoden in der Neurobiologie. Für ihre Untersuchungen nutzten die Forschenden den neuen Freie-Elektronen-Röntgenlaser SwissFEL.
«Switzerland Innovation Tech4Impact»: Ausschreibung für wegweisende Innovationen
Die gegenwärtige Pandemie setzt auch dem Schweizer Wirtschaftsstandort schwer zu. Deshalb gilt es, gerade jetzt in die Innovation zu investieren. In diesem Sinn startet die Stiftung «Switzerland Innovation» zusammen mit namhaften Partnern der Schweizer Wirtschaft ihre erste grosse Ausschreibung. Finanziert werden Innovationsprojekte, welche sich den drängendsten Problemen unserer Zeit annehmen.
Young Scientist Award 2020
The Young Scientist Award 2020 of the European Magnetism Association (EMA) goes to Claire Donnelly for advances in the experimental characterization of spin textures and their dynamics in three dimensions with X-ray techniques.
Claire Donnelly, a former Ph.D. and postdoc at PSI in the Mesoscopic Systems Group, is currently a Leverhulme Early Career Research Fellow in the Cavendish Laboratory, University of Cambridge. She received her PhD in 2017 from the ETH Zurich for her work on hard X-ray tomography of three-dimensional magnetic structures based at the Paul Scherrer Institute. Following a postdoc at the ETH Zurich, she moved to the University of Cambridge and the Cavendish in January 2019, where she is focusing on the dynamics of three-dimensional magnetic nanostructures.
Her research focuses on three dimensional magnetic systems, which she studies using sophisticated synchorotron X-rays to determine the three-dimensional magnetic configurations, and their dynamic behaviour, at the nanoscale.