A5041686736- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Advanced Materials Characterization Techniques
- Graphene research and applications
- Surface and Thin Film Phenomena
- Physics of Superconductivity and Magnetism
- Glass properties and applications
- Force Microscopy Techniques and Applications
- Diamond and Carbon-based Materials Research
- Atomic and Molecular Physics
- Electronic and Structural Properties of Oxides
- Random lasers and scattering media
- Archaeology and ancient environmental studies
- Topological Materials and Phenomena
- 2D Materials and Applications
- Electron and X-Ray Spectroscopy Techniques
- High-pressure geophysics and materials
- Metal and Thin Film Mechanics
- Material Dynamics and Properties
- Plasmonic and Surface Plasmon Research
- Spectroscopy and Laser Applications
- Advanced Frequency and Time Standards
- Quantum and electron transport phenomena
- Advanced Electron Microscopy Techniques and Applications
University of Bergen
2016-2025
University of Copenhagen
2006-2018
Graz University of Technology
2007-2010
Royal Gwent Hospital
2008
University Hospital of Wales
2008
Institute of Experimental Physics of the Slovak Academy of Sciences
2003-2008
Max Planck Society
2002-2003
Cavendish Hospital
1998-2003
University of Cambridge
1994-2001
Abstract We propose in this White Paper a concept for space experiment using cold atoms to search ultra-light dark matter, and detect gravitational waves the frequency range between most sensitive ranges of LISA terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment Dark Matter Gravity Exploration (AEDGE), will also complement other planned searches exploit synergies with wave detectors. give examples extended sensitivity matter offered...
Measurement and monitoring of pH are essential in both the industry academia. It is therefore important to continue developing novel, low-cost sensors that provide increased accuracy over long periods time. Particularly promising based on materials show pH-dependent fluorescence intensity (FI) lifetime (FL). Carbon dots (CDs) emerging as candidates because their low cost, ease manufacturing, toxicity, negligible photobleaching. However, little has been done quantify FI FL values CDs. Here we...
Neutral helium atom microscopy is a novel technique which offers strictly surface-sensitive, non-destructive imaging. Several experiments have been published in recent years where images are obtained by scanning beam spot across surface and recording the variation scattered intensity at fixed total scattering angle θ
Abstract Identification of archaeological and historical textile fibres is important because it gives insight into resource management in former times. The arrival new tools such as table-top scanning electron microscopes, have led to an increased interest the topic. Unfortunately, there been cases where a lack documentation regarding instrument settings selection criteria has questionable conclusions being drawn. Optical microscopy are powerful techniques, but they must be used correctly...
Summary Matter‐wave microscopy can be dated back to 1932 when Max Knoll and Ernst Ruska published the first image obtained with a beam of focussed electrons. In this paper new step in development matter‐wave is presented. We have created an instrument where neutral, ground‐state atoms (helium) used sample. present 2D images using technique. The imaged sample free‐standing hexagonal copper grating (with period about 36 μm rod thickness 8 μm). were transmission mode by scanning beam, which had...
It is generally assumed that the production of plant fibre textiles in ancient Europe, especially woven for clothing, was closely linked to development agriculture through use cultivated textile plants (flax, hemp). Here we present a new investigation 2800 year old Lusehøj Bronze Age Textile from Voldtofte, Denmark, which challenges this assumption. We show made imported nettle, most probably Kärnten-Steiermark region, an area at time had otherwise established flax production. Our results...
Summary The identification of bast fibre samples, in particular, fibres used textiles, is an important issue archaeology, criminology and other scientific fields. One the characteristic features their fibrillar orientation, referred to as Z‐ or S twist (or alternatively right‐ left‐handed fibres). An empirical test for determining orientation using polarized light microscopy has been known community many years. It modified Herzog red plate test. reputation never producing false results, but...
This paper presents material properties particularly suited to be measured with helium scattering techniques. Below a specific science case example illustrating the measurement of electron–phonon coupling constant <italic>λ</italic> on topological insulator surface.
The polar bear ( Ursus maritimus ) is the only Arctic land mammal that dives into water to hunt. Despite thermal insulation provided by blubber and fur layers low temperatures, their typically observed be free of ice. This study investigates anti-icing properties fur. Here, we show exhibits ice adhesion strengths comparable fluorocarbon-coated fibers, with a consequence sebum (hair grease). Lipid analyses reveal presence cholesterol, diacylglycerols, anteisomethyl-branched fatty acids,...
Students and educators often face time constraints, making it essential to develop interventions that are both easy implement have a substantial impact on learning performance. One promising strategy is retrieval practice, particularly in the context of physics education, where many students struggle with basic knowledge. Prior research has shown practice improves self-explanation problem-solving performance, yet avoid it, even when resources provided. To address this, we introduced...
Nowadays most plant textiles used for clothing and household are made of cotton viscose. Before the 19th century however, were mainly from locally available raw materials, in Scandinavia these were: nettle, hemp flax. It is generally believed that Viking early Middle Ages was only coarse (i.e. rope sailcloth). Here we present an investigation 10 Scandinavian fibre Early Ages, to be produced. Up till now they all We show 4 textiles, including two pieces famous Överhogdal wall-hanging fact...
Plant fibres have been used since ancient times in numerous applications ranging from nets and basketry to textiles for clothing. A proper identification of plant fibre remains archaeological excavations provides important information about resource exploitation agriculture. In order identify fibres, a series features—cross‐section diameter, lumen dislocations (nodes), cross markings, cross‐section shape shape—have defined characteristic traits these features different types established. How...
Solar cells play an increasing role in global electricity production, and it is critical to maximize their conversion efficiency ensure the highest possible production. The number of photons entering absorbing layer solar cell plays important achieving a high efficiency. Metal nanoparticles supporting localized surface plasmon resonances (LSPRs) have for years been suggested light in-coupling applications. However, most studies focused on materials exhibiting strong LSPRs, which often come...
In 2008 we presented the first images obtained with a new type of matter wave microscope: NEutral Helium Atom MIcroscopy (NEMI). The main features in NEMI are low energy atoms (<0.1 eV) and fact that they neutral. This means fragile and/or insulating samples can be imaged without surface damage charging effects. ultimate resolution limit is given by de Broglie wavelength (about 0.06 nm for room-temperature beam), but reaching small focus spot still major challenge. best result previously was...
Abstract The development of reliable and cost-efficient methods to assess the toxicity nanomaterials (NMs) is critical for proper identification their impact on human health ensuring a safe progress nanotechnology. In this study, we investigated reliability applicability label-free impedance flow cytometry (IFC) in vitro nanotoxicity screening, which avoids time-consuming labelling steps minimizes possible NM-induced interferences. U937 lymphoma cells were exposed 24 h eight different at...