Materials Literature
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The electrochemical behavior of adsorbed NO molecules on a Pt(100) electrode has been studied in perchloric acid solutions by means of cyclic voltammetry. According to the literature data, a saturated NO adlayer with a coverage of ∼0.5 monolayers (MLs) is formed under open circuit conditions in an acidic nitrite solut…
The discrete element method (DEM) was used to model calcium-silicate-hydrate (C-S-H) at the nanoscale. The C-S-H nanoparticles were modeled as spherical particles with diameters of approximately 5?nm. Interparticle forces included traditional mechanical contact forces, van der Waals forces and ionic correlation forces…
Hydrogel trifft Silicon: Die chemische Funktionalisierung einer Polydimethylsiloxan(PDMS)-Oberfläche mit einem „klebenden“ Polysaccharid induziert eine starke dauerhafte Adhäsion zwischen dem Hydrogel und PDMS. Das hydrogelbeschichtete Siliconsubstrat war von Nutzen für die kontrollierte Organisation von Zellen unter…
We demonstrate a new concept of self-adaptive materials, where sulphur is incorporated into TiC/a-C coatings and may be released in, for example, a tribological contact. By reactive sputtering with H2S, sulphur goes into the carbide to form a TiC x S y phase in an amorphous carbon matrix. The addition of sulphur lower…
The effect of soft X-ray irradiation on the crystallization of a Si 1- x Ge x multilayer was investigated for the realization of low-temperature crystallization. This method is influenced by the Ge concentration and photon flux density by adjusting the photon energy to the optimum value related with the Ge 3d electron…
Polymer networks containing trithiocarbonate units as its dynamic covalent system able to radically response to external stimulus are successfully prepared via reversible addition-fragmentation chain transfer polymerization (RAFT). Irradiation with microwave in a few minutes causes the rehealing of the cross-linked po…
Double helical structures of DNA and RNA are mostly determined by base pair stacking interactions, which give them the base sequence-directed features, such as small roll values for the purine-pyrimidine steps. Earlier attempts to characterize stacking interactions were mostly restricted to calculations on fiber diffr…
Aqueous solubility is a critical factor for optimum drug delivery. In the present study, we investigated the potential of drug-cyclodextrin complexation as an approach for improving the solubility and bioavailability of famotidine, an H2-receptor antagonist and acid reducing drug which has poor solubility and bioavail…
We present a two-axis electrostatic MEMS scanner with high-reflectivity monolithic single-crystal-silicon photonic crystal (PC) mirrors suitable for applications in harsh environments. The reflective surfaces of the MEMS scanner are transfer-printed PC mirrors with low polarization dependence, low angular dependence,…
We study the low-energy states of Kondo alloys as a function of the magnetic impurity concentration per site x and the conduction electron average site occupation n(c). Using two complementary approaches, the mean-field coherent potential approximation and the strong-coupling limit, we identify and characterize two di…
Mn(III) complexes with tridentate Schiff bases have been prepared and applied as catalyst precursors in epoxidation of alkenes using iodosobenzene as an oxidant providing high conversions and high selectivities when cyclohexene derivatives were studied.
This paper reports on an extensive analysis of the electroluminescence characteristics of InGaN-based LEDs with color-coded structure, i.e., with a triple quantum well structure in which each quantum well has a different indium content. The analysis is based on combined electroluminescence measurements and two-dimensi…
A novel polymeric complex has been synthesized by refluxing disodium acetylene dicarboxylate with tributyltin chloride in dry methanol. The solid-state structure of the complex has been determined by single-crystal X-ray analysis. The tin(IV) metal exhibits distorted trigonal bipyramidal geometry. Each carboxylate gro…
The magnetoelastic excitations of spin frustrated ZnCr${}_{2}$O${}_{4}$ are studied by the magnetic field dependence of the thermal conductivity $k$ down to 50 mK. Above the first-order magnetostructural transition at ${T}_{N,S}$ \ensuremath{\approx} 12.5 K, spin fluctuations are strongly coupled to acoustic phonons,…
This paper is intended to demonstrate the effect of the high refractive index of an intermediary zinc oxide (ZnO) layer to improving the full width at half maximum (FWHM) of the surface plasmon resonance (SPR) reflectance curve. This case is an asymmetric dielectric structure (ADS) of low-loss surface plasmon resonanc…
A thick InGaN film was grown on a sapphire substrate by metal organic vapor phase epitaxy using a thin buffer layer of sputter-deposited InGaN. A thick film of highly luminescent In0.2Ga0.8N can be successfully grown at a rate as high as 2 µm/h. The crystal quality of InGaN grown on the sputter-deposited InGaN buffer…
A recently developed pseudospectral frequency-domain (PSFD) method employing a penalty scheme is further incorporated with stretched coordinate perfectly matched layers (PMLs) in order to solve waveguide leaky modes. Several standard leaky-mode slab and circular waveguides, including the W-type and M-type ones, are ex…
We report on the substrate laser lift-off (LLO) in lateral conduction flip-chip (FC) deep-UV light-emitting diodes (LEDs) with peak emission wavelength at 285 nm. The AlGaN-based LED epilayer structure was grown on a low-defect 2 µm-thick AlN/sapphire template and processed into 3×3 small periphery pixel-LED arrays. T…
Schottky type metal–semiconductor–metal (MSM) Al0.4Ga0.6N photodetectors (PDs) for the ultraviolet C spectral region on conventional planar AlN templates are compared with epitaxial laterally overgrown (ELO) AlN templates. On planar templates solar blind MSM PDs with state-of-the-art dark current in the pA range and a…
The formation of microvascular networks (MVNs) is influenced by many aspects of the microenvironment, including soluble and insoluble biochemical factors and the biophysical properties of the surrounding matrix. It has also become clear that a dynamic and reciprocal interaction between the matrix and cells influences…