Core-level photoelectron spectroscopy probing local strain at silicon surfaces and interfaces

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Metal‐organic frameworks (MOFs) featuring high densities of selective metal binding sites represent promising materials for the extraction of toxic metal ions from liquids. This study presents a Zr‐MOF containing accessible thiol functionalities that demonstrates exceptional adsorption capacity and recyclability for the capture of lead(II) ions (Pb(II)). Structural characterization via Pair Distribution Function (PDF) and Powder X‐ray diffraction (PXRD) analyses revealed well‐defined Zr‐clusters interconnec

• Duplex Fe–Mn–Si SMAs were designed by adjusting Si and Cr contents, yielding controlled austenite–ferrite phase fractions. • Duplex microstructures significantly increased yield strength while maintaining comparable recovery stresses to the single-phase alloy. • Higher Cr contents improved corrosion resistance in chloride-containing environments. • Results establish composition–microstructure guidelines for strengthening Fe–Mn–Si SMAs without degrading functional performance. In this study, novel FeMnSi-b

Angle-resolved photoemission spectroscopy (ARPES) is a widely used characterization technique in condensed matter physics, providing direct access to the single-electron spectral function of crystals, including their electronic band structure and Fermi surface. Measuring the band structure of novel quantum materials has been fundamentally important for determining, for example, nontrivial band topology, as in topological insulators, Weyl semimetals, and Dirac semimetals, or for identifying new classes of ma

The use of kinetic models of metabolism in design-build-learn-test cycles is limited despite their potential to guide and accelerate the optimization of cell factories. This is primarily due to difficulties in constructing kinetic models capable of capturing the complexities of the fermentation conditions. Building on recent advances in kinetic-model-based strain design, we present the rational metabolic engineering of an S. cerevisiae strain designed to overproduce p-coumaric acid (p-CA), an aromatic amino

We investigate the effect of shear dilatancy of a permeable fault on the diffusion of pore pressure and the occurrence of dynamic slip. Starting from the results of Garagash & Germanovich (2012), we include the effect of both inelastic changes of material porosity and hydraulic aperture with slip on the nucleation and arrest of dynamic slip. Locally elevated pore pressure associated with fluid injection leads to a reduction of the fault frictional resistance which may eventually falls below the background s

The supraspinatus tendon is often involved in rotator cu↵ tears. The pathogenesis of such tears is not well known and can be multicausal (mechanical, inflammatory, ...). The idea of this project was to analyse the mechanical contribution to rotator cuff tears with a numerical deformation analysis of the supraspinatus tendon. The tendon was simulated under tension in two conditions: an isotropic case and an anisotropic case. In the isotropic case, the tendon was simulated with the same material properties in

To study the deformation and fracture of sandstone under static-dynamic coupled load, a cylindrical specimen under pre-static axial and confining pressure was dynamically loaded using an improved split Hopkinson pressure bar (SHPB). Through the application of a special shape striker, stress equilibrium and nearly constant strain rate in specimen were achieved. During dynamic tests, the failure process of the specimen was completely monitored (7 frames at a time resolution of 25 s) by a high speed (HS) came

The electronic structure of the optimally hole-doped pnictide compound Ba0:6K0:4Fe2As2 was obtained and studied by angle resolved photoemission spectroscopy (ARPES). The light polarization dependence of the bands is explained by the selection rules contained in the photoemission transition matrix elements, and gives novel information on the possible orbital character of the bands. The Fermi surface geometry also shows important variations with light polarization. An attempt is made to analyze its more compl

We have investigated by angle-resolved photoemission spectroscopy changes induced by Xe adsorption on the spin-orbit-split bands of the epitaxial Ag(111) (root 3x root 3)R30 degrees-Bi surface alloy. We observe an extensive backfolding of the alloy band structure due to the formation of a 9 x 9 commensurate or quasicommensurate Xe overlayer and the opening of a small hybridization gap at the intersection of two sets of bands of (primarily) Bi sp(z) and p(xy) characters. The large spin-orbit splitting of the

The motivation of this work derives from the need of the cutting tool industry to improve its products in order to support harder and harder working conditions, namely increasing cutting speeds and working on stronger modern materials. The lifetime of the tools is limited by plastic deformation that occurs at the cutting edge under working conditions, which involve high temperatures and stresses. The high temperature deformation of the materials that are used for the production of cutting tools is studied.

The reaction of half-sandwich complexes of ruthenium, rhodium, and iridium with amino-substituted 3-hydroxy-2-pyridone ligands in aqueous solution gives monomeric O,O'-chelate complexes. Upon addition of base, the complexes assemble to form trimeric metallamacrocycles, as evidenced by NMR spectroscopy and single-crystal X-ray analyses. The macrocycles are able to act as highly selective receptors for lithium ions. The binding constants depend on the nature of the half-sandwich complex. the ligand, and the p

A d.c. oxygen glow discharge was used to modify medical-grade poly(vinyl chloride) (PVC) to study how surface chemistry and hydrophilicity influence Pseudomonas aeruginosa adhesion. The effects of plasma exposure time on the resulting surface, including chemical composition, wettability and roughness, were assessed using x-ray photoelectron spectroscopy, contact angle measurements and atomic force microscopy analysis. A significant alteration in the hydrophilicity of the native PVC surface was observed afte

Novel x-ray spectroscopies such as high-resolution x-ray absorption (XAS) performed in the partial fluorescence yield mode (PFY), and resonant emission (RXES) offer new opportunities to probe the bulk electronic configuration in strongly correlated systems. We performed an Yb L-3 PFY-XAS and RXES investigation of the intermediate valence compound YbAl2 under external pressure. We found that the Yb valence increases from 2.25 at ambient pressure to 2.9 at 385 kbar. This experiment has extended the range of p

After assessing the current status concerning the interpretation of Si 2p core-level shifts in Si-O systems, we model the atomic structure of the Si(001)-SiO2 interface using recent photoemission data obtained with synchrotron radiation. Our model structure reproduces the amount, the distribution, and the location of silicon atoms in intermediate states of oxidation. Our model also shows a SiO2 density in the neighborhood of the interface consistent with X-ray reflectivity measurements. (C) 2002 Elsevier Sc

A novel MEMS technological platform for RF passive components, namely RF MEMS switches, tuneable capacitors and high-Q suspended inductors, is reported. The proposed process employs a metal (Al, AlSi or Cu) as active movable layer and amorphous silicon or polycrystalline silicon as sacrificial layers, providing multi-air-gaps. Various types of substrates like bulk silicon and SOI can be used. Full-dry releasing of suspended beams and membranes is performed with SF_6 or XeF_2, with unrivalled yield/reproduci

Crack patterns of 53 nm and 103 nm thick silicon oxide coatings on poly(ethylene terephthalate) films are analyzed under equibiaxial stress loading, by means of a bulging cell mounted under an optical microscope with stepwise pressurization of film specimens. The biaxial stress and strain are modeled from classical elastic membrane equations, and an excellent agreement is obtained with a finite element method. In the large pressure range, the derivation of the biaxial strain from force equilibrium considera

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Ballistic emission electron and X-ray photoelectron emission microscopy studies are presented for the sulfur-passivated Pt-GaP(001) buried metal-semiconductor interface. The topographic/ballistic images showed that the roughness of the metal-semiconductor samples after sulfur passivation and Pt deposition is higher than in the as-received substrate. The photoelectron emission microscope microimages showed a significant inhomogeneity as far as the interface chemical environment is concerned. The strongest in

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Core-level photoelectron spectroscopy probing local strain at silicon surfaces and interfaces

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Efficient, Reversible Lead Adsorption in a Thiol‐Decorated Zirconium‐Metal–Organic Framework

Development and characterization of FeMnSi-based shape-memory alloys with austenitic–ferritic duplex microstructure

Impact of static disorder on quasiparticle spectra: Debye-Waller, mean free path, and potential fluctuation effects

Kinetic-model-guided engineering of multiple S. cerevisiae strains improves p-coumaric acid production

Modelling of fluid injection into a frictional weakening dilatant fault

Fiber distribution in a 3D FEM Model of the Supraspinatus Tendon

HS DIC-system application for strain and displacement measurements under static-dynamic coupling loading

Orbital characterization of iron-pnictide high-temperature superconductors by angle resolved photoemission spectroscopy

Effect of rare-gas adsorption on the spin-orbit split bands of a surface alloy: Xe on Ag(111)-(root 3 x root 3) R30 degrees-Bi

High temperature deformation mechanisms of cemented carbides and cermets

PH-Triggered assembly of organometallic receptors for lithium ions

Surface modification of PVC endotracheal tubes by oxygen glow discharge to reduce bacterial adhesion

Determination of pressure-induced valence changes in YbAl2 by resonant inelastic x-ray emission

Atomic structure at the Si(001)-SiO2 interface: from the interpretation of Si 2p core-level shifts to a model structure

A novel RF MEMS technological platform

Biaxial fragmentation of thin silicon oxide coatings on poly(ethylene terephthalate)

Constitutive behavior and fracture toughness properties of the F82H ferritic/martensitic steel

Stoichiometry and interdiffusion in PZT thin films studied by transmission electron microscopy

Ballistic-electron emission and secondary photoelectron microscopy of the sulfur-passivated Pt-GaP(001) interface

Texture control of PbTiO3 and Pb(Zr,Ti)O-3 thin films with TiO2 seeding