Materials Literature
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Semiconductor quantum dots (QDs) are tiny light-emitting particles that have emerged as a new class of fluorescent labels for biology and medicine. Compared with traditional fluorescent probes, QDs have unique optical and electronic properties such as size-tuneable light emission, narrow and symmetric emission spectra…
In order to study the influence of temperature on the developing processes of surface discharges in oil-paper insulation, a discharge test assembly is established to simulate the surface discharges in transformers. It consists of a surface discharge model, a test rig and a PD detection system. Long-term laboratory tes…
For PD measurements in unscreened laboratories, factory environments, or even during on-site conditions, the measuring result is overlaid and sometimes dominated by numerous disturbances. As common-wave interferences such as radio signals, e.g., can easily be suppressed by frequency-domain filters, pulse-like disturba…
An experimental setup for dielectric testing of insulating liquids in the temperature range from -60 °C to +250 °C has been built. The system uses point-plane geometry, a sensitive differential charge measurement technique, a computer controlled temperature regulator, a photomultiplier and a pulse generator with a fas…
Gold nanorods have strong surface plasmon band at near-infrared light region, and are used as a photothermal converter. Since the near-infrared light penetrates into tissues deeply, it has been expected as a contrast agent for near infrared light bioimaging, a photosensitizer for photothermal therapy, and functional d…
Hydrocarbons, carbon monoxide, and other polluting emissions produced by diesel engines are usually much lower than those from gasoline engines. However, higher combustion temperature in diesel engines cause substantially larger percentage of nitrogen oxides (NOx) emissions. Selective catalyst reduction (SCR) is a wel…
Abstract In recent years, significant progress in high pressure macromolecular crystallography has been observed. It can be attributed both to the developments in experimental techniques, as well as to recognition of importance of high pressure protein studies in biochemistry and biophysics. The number of protein stru…
Processing of mesoporous films is a critical step that needs a careful control and comprehension of the chemical−physical phenomena that governs evaporation induced self-assembly. We have used time-resolved infrared spectroscopy to study two of the main stages of self-assembly in titania films: evaporation and postdep…
Vertically oriented, densely packed Ni nanorod arrays have been fabricated on metal-coated Si substrate via cost-effective electrochemical technique. Directional growth of the nanorods is performed through the nanopores of anodic alumina membrane via electrodeposition process. Al2O3 membrane is removed at the final fa…
The paper describes the electrical and optical properties of underwater discharges in highly inhomogeneous electric fields caused by 1.2/50 <TEX>${\mu}s$</TEX> impulse voltages as functions of the polarity and amplitude of the applied voltage, and various water conductivities. The electric fields are formed by a point…
Abstract The synthesis and characterization of dimeric lanthanide amides stabilized by a dianionic N ‐aryloxo functionalized β ‐ketoiminate ligand are described in this paper. Reactions of 4‐(2‐hydroxy‐5‐ tert ‐butyl‐phenyl)imino‐2‐pentanone (LH 2 ) with Ln[N(SiMe 3 ) 2 ] 3 (µ‐Cl)Li(THF) 3 in a 1:1 molar ratio in THF…
Abstract The crystal structure of H 3 O + -exchanged pharmacosiderite (pharmacosiderite is KFe 4 (AsO 4 ) 3 (OH) 4 · n H 2 O, sensu stricto ) has been determined by single-crystal X-ray diffraction and refined to R 1 = 0.0418. H 3 O + -exchanged pharmacosiderite, (H 3 O + )Fe 4 (AsO 4 ) 3 (OH) 4 ·4.5H 2 O, is cubic, s…
Any problem in cable insulation system is generated by the mechanism of either conduction or polarization. By measuring depolarization current, equivalently the absorption current, in conjunction with polarization current, conduction and polarization in cable insulation system can be identified. This article provides…
Single-crystal-like films are promising candidates for magnetic shape memory (MSM) applications on the microscale. For defect reduction and stress relaxation, we apply a heat treatment to pulsed laser deposited, partial epitaxial Fe–Pd films with different compositions. By recrystallization starting from the epitaxial…
In this paper, the double layer concept of knitted fabrics suitable for performance sportswear, where each layer is separate from the other, was studied. Aerodynamic properties of this assembly, where the base layer is made of 100% wool and an external layer made of 100% filament polyester were determined. Fabric samp…
Arsenic K -edge X-ray absorption near-edge structure (XANES) spectroscopy has been used to investigate the local geometry around the pnictogen site in the REFeAsO (RE=La, Pr, Nd and Sm) oxypnictides, combined with full multiple-scattering calculations to understand different XANES features. The As K -edge XANES spectr…
In this study, changes in the chemical, structural, and electrical properties of undoped and 8.4 at. % nitrogen-doped GeTe films were investigated. The transition temperature of sheet resistance increased as a result of nitrogen doping, which corresponded well with phase transformations. The shift of chemical potentia…
The influence of different processing stages on the low stress mechanical and surface properties of cotton knitted fabrics has been studied. The KES-FB system has been used for the measurements of low stress tensile, shear, bending, compression and surface properties. The results show remarkable changes in mechanical…
Heterogeneous nucleation of water plays an important role in wide range of natural and industrial processes. Though heterogeneous nucleation of water is ubiquitous and everyday experience, spatial control of this important phenomenon is extremely difficult. Here we show, for the first time, that spatial control in the…
Modern insulation systems have to become more compact, less massive and environmentally acceptable. Elastic syntactic foams represent a multifunctional, elastic and compressible hybrid insulation material with a low density and a strong adhesion to polymers and metals. This kind of 'elastic foam' consists of a silicon…