Results 11 to 20 of about 1,229 (131)

N-Heterocyclic Carbenes on a III-V Semiconductor: From Chain Formation to Ordered Monolayers. [PDF]

Angew Chem Int Ed Engl
The functionalization of GaAs, a model III‐V semiconductor, with N‐heterocyclic carbenes is demonstrated in a multidisciplinary experimental and theoretical approach. In this way, ordered monolayers consisting of chains of molecules binding covalently to the surface are obtained, which are found to strongly modify the surface properties as evident from
Franz M, Das A, Chandola S, Kubicki M, Das M, Sette A, Corona D, Palummo M, Chiodo L, Schöder R, Chahar P, Fuhrmann B, Engelhardt J, Düren O, Rosenzweig DS, Bakos P, Jakob KL, Dähne M, Hogan C, Esser N, Glorius F.   +20 more
europepmc   +2 more sources

Flip Angle Errors in Actual Flip Angle Imaging Using Polyvinylpyrrolidone/Water-Based Phantoms. [PDF]

Magn Reson Med
ABSTRACT Purpose The aim of this work is to report and investigate unexpected errors in actual flip angle imaging (AFI) applied to phantom fillings based on polyvinylpyrrolidone (PVP). Methods Flip angle maps of PVP/water mixtures with different PVP ratios were acquired at 3 T and 7 T using a 3D cartesian AFI. The influence of spoiling was investigated
Himburg N, Lutz M, Mitschang L, Frintz JG, Schmitter S.   +4 more
europepmc   +2 more sources

A multiscale <i>in situ</i> time-resolved study of the nano- to millisecond structural dynamics during protein crystallization. [PDF]

J Appl Crystallogr
Protein crystallization is a crucial method for structure determination and biological studies, but its pathways remain poorly understood, often relying on trial and error to initiate crystallization. Using a multitechnique approach, this study investigates structural and diffusion properties across various time and length scales to compare different ...
Beck C, Mosca I, Miñarro LM, Sohmen B, Buchholz C, Maier R, Reichart LF, Grundel AC, Bäuerle F, Nasro R, Banks H, Christmann S, Pastryk KF, Farago B, Czakkel O, Prévost S, Gerlach A, Grimaldo M, Roosen-Runge F, Matsarskaia O, Schreiber F, Seydel T.   +21 more
europepmc   +2 more sources

Is Phenylnitrene a Missing Link in the Formation of Polycyclic Aromatic Nitrogen Heterocycles? [PDF]

Angew Chem Int Ed Engl
A new formation pathway for polycyclic aromatic nitrogen heterocycles (PANHs) has been found. The reaction of phenylnitrene and the propargyl radical leads to quinoline, proving that nitrenes are suitable precursors for nitrogen incorporation mechanisms.
Arns R, McClish R, Hemberger P, Bodi A, Bouwman J, Kasper T, Schleier D.   +6 more
europepmc   +2 more sources

Mitigating Mobile-Ion-Induced Instabilities and Performance Losses in 2D Passivated Perovskite Solar Cells. [PDF]

Adv Mater
This study addresses the challenges of mobile‐ion‐induced instability in perovskite solar cells. Introducing bilayer passivation with ammonium salts (EDAI₂/PEAI and ABS/PEAI) significantly reduces ion density and improves device stability. The approach mitigates the detrimental effects of PEAI‐induced ionic losses, enhancing both performance and ...
Seid BA, Ozen S, Castro-Méndez AF, Neher D, Stolterfoht M, Lang F.   +5 more
europepmc   +2 more sources

Nucleon quasi-parton distributions in the large Nc limit

Physics Letters B, 2020
In this letter, we investigate the nucleon quasi-parton distribution functions in the chiral quark soliton model. We derive a set of sum-rules depending on the velocity of the nucleon and on the Dirac matrix defining the distribution functions.
Hyeon-Dong Son, Asli Tandogan, Maxim V. Polyakov   +2 more
doaj   +1 more source

Nucleon-nucleon scattering in the 1S0 partial wave in the modified Weinberg approach

EPJ Web of Conferences, 2016
Nucleon-nucleon scattering in the 1S0 partial wave is considered in chiral effective field theory within the recently suggested renormalizable formulation based on the Kadyshevsky equation.
Gasparyan A. M., Epelbaum E., Gegelia J., Krebs H.   +3 more
doaj   +1 more source

Analysis of the temperature- and fluence-dependent magnetic stress in laser-excited SrRuO3

Structural Dynamics, 2021
We use ultrafast x-ray diffraction to investigate the effect of expansive phononic and contractive magnetic stress driving the picosecond strain response of a metallic perovskite SrRuO3 thin film upon femtosecond laser excitation.
M. Mattern, J.-E. Pudell, G. Laskin, A. von Reppert, M. Bargheer   +4 more
doaj   +1 more source

The population of Galactic supernova remnants in the TeV range [PDF]

EPJ Web of Conferences
Galactic Supernova remnants (SNRs) are likely to be significant sources of cosmic rays (CRs) up to the knee of the CR spectrum. They produce gamma rays in the very-high-energy (VHE) range.
Batzofin Rowan, Cristofari Pierre, Egberts Kathrin, Steppa Constantin, Meyer Dominique   +4 more
doaj   +1 more source

No-Slip Boundary Conditions for Electron Hydrodynamics and the Thermal Casimir Pressure

Universe, 2021
We derive modified reflection coefficients for electromagnetic waves in the THz and far infrared range. The idea is based on hydrodynamic boundary conditions for metallic conduction electrons.
Mandy Hannemann, Gino Wegner, Carsten Henkel   +2 more
doaj   +1 more source