OpenAccess

Nickel hydroxide (Ni(OH)$_2$) is a promising pseudocapacitive material owing to its high theoretical capacitance and reversible Ni$^{2+}$/Ni$^{3+}$ redox activity. Here we demonstrate that carbonate incorporation during hydrothermal synthesis is the key structural factor limiting its electrochemical performance [...]

Two key measurements and two phenomenological studies of top quark pair ($\mathrm{t\bar{t}}$) production with the CMS experiment at the CERN Large Hadron Collider are presented. They include the first measurement of the $\mathrm{t\bar{t}}$ cross section at the new energy frontier, a detailed analysis of the $\mathrm{t\bar{t}}$ threshold culminating in the first observation of $\mathrm{t\bar{t}}$ bound state effects, and searches for new physics in $\mathrm{t\bar{t}}$ final states, such as heavy scalars, pseudoscalars or Axion-Like Particles.The inclusive $\mathrm{t\bar{t}}$ production cross section $\sigma_{\mathrm{t\bar{t}}}$ is measured for the first time at the world-record energy of $\sqrt{s} = 13.6\,\mathrm{TeV}$, using $1.21\,\mathrm{fb}^{-1}$ of early LHC Run 3 data. [...]

We have produced foams from cellulose nanofibrils from upcycled cotton (upCNF) and wood (wCNF) through unidirectional (UIT) and multidirectional ice-templating (MIT) and investigated the structural humidity response through in-situ WAXS, SAXS, and micro tomography (μCT) between 10 and 95 % relative humidity (RH). The upCNF and wCNF WAXS patterns displayed a shape- and position shift as the RH was increased, with a compression in the (200) direction and an elongation in the (004) direction. [...]

Data adjustment is an essential tool for increasing statistical power during analysis, for example in case of complex multi-experiment data from (single-cell) RNA, proteomics and other omics data. Despite its benefits, data integration introduces internal biases—so-called batch effects. [...]

A pressure-transmitting medium (PTM) plays an important role in diamond anvil cell (DAC) experiments as it ensures that the sample is exposed to hydro­static pressure. Although PTMs that are liquids under ambient conditions are the easiest to handle and load, the selection of chemically inert liquid media with established hydro­static properties is limited. [...]

AbstractThis thesis both proposes and experimentally explores the opportunity to operate TransitionEdge Sensors (TES) as detectors for Dark Matter (DM)-scattering by simultaneouslyemploying them as target and sensor. By exploiting their microcalorimetric capabilitiesand sensitivity to low energy depositions, competitive limits can be set on low mass DMinteractions based on electron scattering. [...]

The catalytic potential of flexible metal–organic frameworks (MOFs) remains underexplored, particularly in liquid-phase reactions. This study employs MIL-53(Cr), a prototypical “breathing” MOF capable of structural adaptation via pore size modulation, as a photocatalyst for the dehalogenation of aryl halides. [...]

Crystallization of recombinant proteins in living cells is an emerging approach complementing conventional crystallization techniques. Homogeneous microcrystals well suited for serial diffraction experiments at X-ray free-electron lasers and synchrotron sources can be produced in a quasi-native environment, without the need for target protein purification. [...]

Three-dimensional (3D) imaging is crucial for elucidating the complex structure of organoid models which involve complex spatial cellular and tissue organization in 3D. While a variety of volume imaging methods, including novel light microscopy tools, are now well established to probe the cellular complexity of organoids in 3D, the gold standard for obtaining a precise morphological picture is histology, a traditionally 2D imaging technique that relies on slicing the specimen and therefore has severe limitations in scalability and volumetric imaging [...]

The effect of pressure on the structural evolution, the enhancement of the photoluminescence intensity, and the optical bandgap of a vacancy-ordered double halide perovskite, Cs2TeCl6, is investigated systematically. We use synchrotron x-ray diffraction, Raman spectroscopy, optical bandgap, and photoluminescence measurements to explore the structural and optical properties of Cs2TeCl6 under pressure up to 30.0 GPa. [...]