Now showing items 21-30 of 809
Rydberg series of dark excitons and the conduction band spin-orbit splitting in monolayer WSe2
(NATURE PORTFOLIO, 2021-08-19)
Strong Coulomb correlations together with multi-valley electronic bands in the presence of spin-orbit interaction are at the heart of studies of the rich physics of excitons in monolayers of transition metal dichalcogenides ...
Entropy-Driven Grain Boundary Segregation: Prediction of the Phenomenon
The question is formulated as to whether entropy-driven grain boundary segregation can exist. Such a phenomenon would be based on the assumption that a solute can segregate at the grain boundary sites that exhibit positive ...
Layered transition metal selenophosphites for visible light photoelectrochemical production of hydrogen
The growing consumption of global energy has posed serious challenges to environmental protection and energy supplies. A promising solution is via introducing clean and sustainable energy sources, including photo-electrochemical ...
Wireless Anodization of Ti in Closed Bipolar Cells
In this work, the anodization of Ti foils in closed bipolar cells is shown for the first time. Depending on the applied potential, i. e. direct or alternating potential, TiO2 nanotube (TNT) layers can either be prepared ...
Synthetic Data in Quantitative Scanning Probe Microscopy
Synthetic data are of increasing importance in nanometrology. They can be used for development of data processing methods, analysis of uncertainties and estimation of various measurement artefacts. In this paper we review ...
Advantageous Description of Short Fatigue Crack Growth Rates in Austenitic Stainless Steels with Distinct Properties
In this work two approaches to the description of short fatigue crack growth rate under large-scale yielding condition were comprehensively tested: (i) plastic component of the J-integral and (ii) Polak model of crack ...
The Impact of Vibrational Entropy on the Segregation of Cu to Antiphase Boundaries in Fe3Al
We performed a quantum mechanical study of segregation of Cu atoms toward antiphase boundaries (APBs) in Fe3Al. The computed concentration of Cu atoms was 3.125 at %.The APBs have been characterized by a shift of the lattice ...
Halogen Bonding in New Dichloride-Cobalt(II) Complex with Iodo Substituted Chalcone Ligands
The synthesis and properties of new chalcone ligand 4I-L ((2E)-1-[4-(1H-imidazol-1-yl)phenyl]-3-(4-iodophenyl)prop-2-en-1-one) and tetracoordinate Co(II) complex [Co(4I-L)(2)Cl-2], (1a), are reported in this article. Upon ...
Efficient control of automotive R744 heat pump using Nelder-Mead simplex method
This paper deals with coefficient of performance maximization for automotive R744 heat pump using Nelder-Mead simplex method.
Cell segmentation methods for label-free contrast microscopy: review and comprehensive comparison
Because of its non-destructive nature, label-free imaging is an important strategy for studying biological processes. However, routine microscopic techniques like phase contrast or DIC suffer from shadow-cast artifacts ...