Materials Literature
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Abstract The temperature‐dependent solubility of hexanitrostilbene (HNS) [CAS# 20062‐22‐0] was determined in ten solvents and solvent blends using the Tyndall effect. Thermodynamic modeling of the data yielded Flory interaction parameters, the molar enthalpy of mixing, the molar entropy of mixing, and the molar Gibbs…
In this paper we present a new approach to the problem of textile surface quality evaluation. The approach is based on the capture and analysis of the profile of protrusions. The specific methods of image processing for protrusion detection and parameterization have been elaborated. New algorithms for the grading of f…
Crystal-growth features of the foliated aragonite from two species of the rare monoplacophoran molluscs have been analyzed. The crystals have unique morphologies. They are very thin along the c axis and elongated along the a axis, and their arrangement varies depending on the species. Surface energy minimization in th…
Reduction of the N-methylated bis-1,2,3-thiaselenazolylium salts [2a,b,c][OTf] (with R(1) = Me and R(2) = H (2a), F (2b), Me (2c)) affords the corresponding bis-1,2,3-thiaselenazolyl radicals 2a,b,c. The radicals crystallize as centrosymmetric Se-Se sigma-bonded dimers [2a,b,c](2), in which an intramolecular Se-S bond…
Photocatalysis and Fenton reaction treatments were first employed to eliminate the residual surfactants in the single-walled carbon nanotubes (SWNTs) films without destroying the intrinsic structure of SWNTs. The removal of the surfactants was verified by Raman and XPS spectra. After the treatments, the conductance of…
Increasing the luminescence of silica particles encapsulating fluorescein by increasing fluorescein concentration is a promising strategy which is unfortunately limited by the phenomenon of self-quenching. In this paper, we demonstrate that this quenching can be almost entirely suppressed by the presence of gold inclu…
In this study we focus on some key problems encountered in the processing of bast fibers from hemp for the production of textiles. These problems include the high content of pectin, the excessive rigidity and the poor “spinnability” of hemp fibers. The results of a thorough analysis of the physical and chemical proper…
The self-assembly of peptide YYKLVFFC based on a fragment of the amyloid beta (A beta) peptide, A beta 16-20, KLVFF has been studied in aqueous solution. The peptide is designed with multiple functional residues to examine the interplay between aromatic interactions and charge on the self-assembly, as well as specific…
This paper presents a facile method for decreasing the size of water dispersible Ni nanoparticles from 30 to 3 nm by the incorporation of a passivating surfactant combination of pluronic triblock copolymer and oleic acid into a wet chemical reduction synthesis. A detailed study revealed that the size of the Ni nanopar…
We report the influence of ZnO nanorod arrays (NRAs) on the light extraction efficiency of GaN light emitting diodes (LEDs). Our investigation indicates that the output light intensity of the device exhibits a periodic oscillation as a function of the rod length. The variation of light extraction efficiency is caused…
The primary environmental variables which influence the water vapor transmission rate of fabrics include air temperature, relative humidity, and wind speed. The combined quantitative effects of air temperature, relative humidity, and wind speed have been explored. The air temperature varied from 10 °C to 30 °C in 5 °C…
Abstract A unique, geometry‐optimized, surface‐enhanced Raman scattering (SERS) fiber‐optic sensor has been recently developed and built. Though this class of sensors can be very useful in many applications, their use is greatly hindered by the fact that their reusability can hardly be achieved because of the irrevers…
Stark gekoppelte, regio- und diastereomerenreine Subphthalocyanin-C60-Dyaden (siehe Kalottenmodell; B orange, C hellblau, H grau, N blau, O rot), die durch dreifache Addition erhalten wurden, können, abhängig vom Abstand zwischen den beiden komplementären π-Oberflächen, auf Photoanregung unterschiedlich reagieren (mit…
Lineare Beziehungen werden beobachtet, wenn man für die Hydrierung ungesättigter Aldehyde an Platinoberflächen die Energien der Übergangszustände () gegen die Energien der Vorstufenzustände () aufträgt (siehe Bild; FS=Endzustand). Mithilfe dieser Beziehung können die Energiebarrieren substituierter Derivate schnell un…
Layer-by-layer assembly has shown a great deal of promise in biomedical coatings, as well as local drug delivery systems. The poor loading capacity of hydrophobic drugs within the multilayers is a drawback in their potential applications. Herein, sulfonated hyperbranched polyether (HBPO-SO(3)) with a hydrophobic core…
Cubic Lu 2 O 3:Eu 3+ nanorods, nanosheets, and nanoparticles are synthesized by a hydrothermal approach by adjusting the pH values of the precursor solutions. The unique luminescence properties of the nanocrystals are presented by the appearances of a long tail at the long-wavelength side of the charge transfer band (…
In this paper, the relaxation modulus of a single spun yarn is modeled in terms of the relaxation modulus of the constituent fibers of the yarn. A generalized Maxwell model is employed to describe the viscoelastic characteristic function of individual fibers subject to a given step function of tensile strain. The ther…
Neu unter die Lupe genommen: Die Strukturen Vanadyl-terminierter Monomere, Trimere (siehe Bild) und Oligomere auf einer CeO2(111)-Oberfläche wurden mit einer Kombination hochentwickelter experimenteller und theoretischer Methoden in atomarer Auflösung untersucht. Die CeO2-Oberfläche stabilisiert Vanadiumoxidspezies im…
The authors have studied low threshold lasing in dye-doped cholesteric liquid crystals (CLCs). We designed and synthesized a dye, 1,3,6,8-tetrakis(6'-hexyloxy-2-naphthyl)pyrene, which has high quantum yield Φ= 0.85. Since the transition dipole moment is perpendicular to the local director of a host CLC, laser oscillat…
Hydrophilic poly(ethylene glycol) (PEG) was grafted onto poly(4-cinnamic acid)-co-poly(3,4-cinnamic acid) (PCA) by Michael addition. The chemical structures of the PCA-graft-PEG (PCA-PEG) copolymers were confirmed by FT-IR and (1)H NMR measurements. The PCA-PEG nanoparticles were self-assembled by the solvent mixing m…