Materials Literature
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A new cyanate ester functionalized polyhedral oligomeric silsesquioxane (POSS-Cy) monomer was prepared by reacting hydroxyl functionalized POSS-OH with cyanogen bromide (CNBr) in the presence of triethylamine (Et 3 N). The precursor POSS-OH and the corresponding cyanate ester POSS-Cy were characterized by Fourier tran…
The present work deals with improvement in the cooling crystallization of sodium acetate using ultrasonic irradiations. Initially the effect of different operating parameters in the conventional approach such as seeding temperature, seed amount, and initial amount of dissolved sodium acetate has been investigated. It…
Using transmission electron microscopy, we study the size-dependent room-temperature oxidation of indium nanoparticles. From the investigation of arrays of In nanoparticles with broad size distribution, we evaluate, under identical conditions, the In 2 O 3 thickness as a function of size at a given time. The results o…
The modeling of corrosion poses particular difficulties. The understanding of corrosion as an electrochemical process has led to simple capacitive-resistive models that take into account the resistance of the electrolytic cell and the capacitive effect of the surface potential at the interface between conductors and t…
Abstract Achieving a high degree of exfoliation in epoxy‐based polymer layered silicate (PLS) nanocomposites is crucial to their successful industrial application, but has hitherto proved elusive. In this work, a system is presented which shows significant promise in this respect. The isothermal cure of PLS nanocompos…
By using water as an exclusive solvent, a facile one-pot strategy was developed for the preparation of hydrophilic magnetite nanofluids coated with oxidized dextran. These as-synthesized magnetic nanofluids are highly water-soluble, biocompatible, and bioconjugatible for targeted detection because of the enriched carb…
We report Monte Carlo simulations that show a closed-loop liquid-vapor equilibrium in a pure substance. This finding has been achieved on a two-dimensional lattice model for patchy particles that can form network fluids. We have considered related models with a slightly different patch distribution in order to underst…
Incorporation of hysteresis models in electromagnetic analysis approaches is indispensable to accurate field computation in complex magnetic media. Throughout those computations, vector nature and computational efficiency of such models become especially crucial when sophisticated geometries requiring massive sub-regi…
It is essential to immobilize gold nanoparticles (AuNPs) firmly onto a certain substrate in a closely packed manner to apply plasmonic functions of AuNP in photonic/electronic devices. AuNP-Si systems are of particular interest for the integration of plasmonics to semiconductor electronics. Here we report on the arran…
We report three major approaches for improving the contrast ratio and viewing angle of a vertical field switching (VFS) blue-phase liquid crystal display (BPLCD). The first approach involves compensation films, the second one uses wire-grid polarizer, and the third one employs an E-type analyzer. Our simulation result…
Organic semiconductors are of great interest for application in cheap and flexible solar cells. They have a typical absorption onset in the visible. Infrared light can be harvested by use of lead-chalcogenide quantum dot sensitizers. However, bulk-heterojunction solar cells with quantum-dot sensitizers are inefficient…
Mn-doped ZnO has attracted considerable attention as an important kind of diluted magnetic semiconductors (DMSs). Here we report a new finding of lateral photovoltaic effect (LPE) in Mn-doped ZnO thin film based on DMS/SiO2/Si structure. Remarkably the induced LPE laser can be extended to infrared region in Mn-doped Z…
Ausgetauscht: Das 2-Azaadamantan-N-oxyl-Radikal (siehe Bild) erweist sich als stabiler und hochreaktiver Redoxmediator in Farbstoffsolarzellen-Elektrolyten. Das Radikal hat ein geeignetes Redoxpotential und zeigt signifikant hohe Diffusionsgeschwindigkeitskonstanten sowie heterogene Elektronentransfer- und Elektronena…
A mechanism for white luminescence of Ag nanoclusters dispersed in oxyfluoride glass host has been revealed by studying a temperature dependence of its polarization memory. The spectral dependence of the polarization memory indicates the presence of a variety of Ag nanoclusters, particularly emitting in the blue, gree…
We present a surface-enhanced Raman scattering (SERS) substrate featured by large-scale homogeneously distributed Ag nanoparticles (Ag-NPs) with sub-10 nm gaps assembled on a two-layered honeycomb-like TiO(2) film. The two-layered honeycomb-like TiO(2) film was achieved by a two-step anodization of pure Ti foil, with…
Mn(III) tetra(meta-fluorophenyl)porphyrin-tetracyanoethenide coordination polymer (abbreviated meta-F) was synthesized and crystallographically and magnetically characterized. The compound crystallizes in the space group C2/c with four equivalent molecules in the unit cell arranged along two symmetry related nonparall…
We investigated the dependency of plasmonic enhancement of Forster energy transfer between CdSe/ZnS quantum dots on the sizes of metallic nanoparticles as well as the distances between these particles and the quantum dots. The results demonstrate how the interdot Forster energy transfer depends upon the relative magni…
Controlled molecule release from scaffolds can dramatically increase the scaffold ability of directing tissue regeneration in vitro and in vivo. Crucial to the regeneration is precise regulation over release direction and kinetics of multiple molecules (small genes, peptides, or larger proteins). To this end, we devel…
We study cavitation dynamics when focusing ring-shaped femtosecond laser beams in water. This focusing geometry reduces detrimental nonlinear beam distortions and enhances energy deposition within the medium, localized at the focal spot. We observe remarkable postcollapse dynamics of elongated cavitation bubbles with…
Infrared optical and inelastic x-ray scattering spectra have been systematically investigated in combination with first-principles calculations for paraelectric and antiferromagnetic perovskite Sr${}_{1\ensuremath{-}x}$Ba${}_{x}$MnO${}_{3}$ ($x=0$--0.3) single crystals, which are close to a ferroelectric transition ar…