Materials Literature
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Abstract Diamond synthetic single crystals exhibiting a high and reliable quality would find many applications in different areas such as optics, mechanics, or electronic devices. In this study, thick high quality homoepitaxial diamond films were grown on synthetic substrates using Micro‐Wave Plasma Assisted Chemical…
Abstract The water absorption and hygrothermal aging behavior of organomontmorillonite (OMMT) reinforced polyamide 6/polypropylene (PA6/PP ratio = 70/30), with and without maleated PP (MAH‐ g ‐PP), was studied at three different temperatures (30, 60, and 90°C). The water absorption and hygrothermal aging response of t…
Durch Einschluss eines paramagnetischen Verschiebungsreagens (SR) für Wasserprotonen in Liposomen wird die Empfindlichkeit von CEST-Agentien (CEST: chemical exchange saturation transfer) erheblich verbessert. Die chemische Verschiebung von Wasser in den Liposomen gegenüber der von freiem Wasser hängt von der Natur und…
Fully aromatic polyimide films containing uniformly oriented Ag nanorods (see Figure) have been prepared by a simple method consisting of thermal curing and uniaxial drawing of submicrometer-scale phase-separated polyimide-blend films containing dissolved AgNO3. The films exhibit outstanding optical dichroism, over 20…
In Gegenwart eines zweizähnigen Phosphanliganden reagieren Silbercarboxylate mit einer Mischung von S(tBu)SiMe3 und S(SiMe3)2 zu den sphäroiden Clustern [Ag123S35(StBu)50] (1) und [Ag344S124(StBu)96] (2; siehe Bild: Ag+ blau, S-Atome der StBu-Gruppen rot, S2− gelb, C grau) mit maximalen Durchmessern von 2.5 bzw. 3.7 n…
Boron nitride nanohorns (BNNHs) are synthesized in large scale. Their morphology and structure were investigated by scanning electron microscopy and transmission electron microscopy. The hollow conical structure and particular aggregation behavior are revealed. Cathodoluminescence measurement is performed and ultravio…
Abstract Summary: Hydrophilic polymeric films based on blends of hydroxyethylcellulose and maleic acid‐ co ‐methyl vinyl ether were produced by casting from aqueous solutions. The physicochemical properties of the blends have been assessed using Fourier transform infrared spectroscopy, thermal gravimetric analysis, di…
Surface-enhanced micro-Raman spectroscopy (micro-SERS) was used to detect traces of the hazardous pollutant polycyclic aromatic hydrocarbons (PAHs) pyrene and benzo[c]phenanthrene deposited onto a calix[4]arene-functionalized Ag colloidal surface. High spectral reproducibility and very low molecular detection limits (…
It is well-known that hydrodynamic pressures in a thin draining liquid film can cause inversion of the curvature of a drop or bubble surface as it approaches another surface, creating a so-called "dimple". Here it is shown that a more complicated rippled shape, dubbed a "wimple", can be formed if a fluid drop that is…
Abstract For the synthesis of aromatic polyesters with defined molecular weights and narrow molecular weight distributions (MWDs), we investigated the chain‐growth polycondensation of active amide derivatives of 4‐hydroxybenzoic acid, 1a and 1b , having an octyl or 4,7‐dioxaoctyl side chain, respectively. To suppress…
Abstract A new intumescent flame retardant (PSiNII), which contains silicon, phosphorus, and nitrogen elements, has been synthesized and incorporated into polypropylene (PP). Its effect on the properties of PP is investigated based on flame retardancy, thermal properties, mechanical properties, and morphologies. The f…
We report surface rheological measurements on Langmuir films of submicron-sized polymer coils (pancakes). The dynamics of the sol phase is found to be governed by free volume as in the simplest percolation problem. The observed rheology of the percolated phase (gel-like) is compatible with predictions for compressed a…
A radial pattern of macroscopic channels can be generated in core−shell polysaccharide microspheres during gel drying. The mechanical properties and the permeability of the outer crust can be tailored to control the formation of shafts in the organogel. The stiffness of the shell resists the shrinkage of the gel and c…
Abstract Thermal blowing of poly(vinyl alcohol) (PVA) film was successfully realized based on molecular complexation. Ways to enhance the performance of the PVA blown films (drawing and surface crosslinking) were studied. The experimental results showed that water exists in PVA films in different states through hydrog…
Abstract Summary: A convenient method for the preparation of well‐defined core‐shell alumina/polystyrene composite nanoparticles (50 nm) through emulsion polymerization from needle‐shaped alumina is reported. The pretreatment of alumina with 3‐methacryloxypropyltrimethoxysilane (MPTMS) is essential for successful enca…
The complex conductivity at the (Verwey) metal-insulator transition in ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ has been investigated at terahertz and infrared frequencies. In the insulating state, both the dynamic conductivity and the dielectric constant reveal a power-law frequency dependence, the characteristic feature…
It has been known for over twenty years that rhombohedral c-germanium telluride is predicted to be a narrow gap semiconductor. However, it always displays p-type metallic conduction. This behaviour is also observed in other chalcogenide materials, including Ge 2 Sb 2 Te 5 , commonly used for optically and electrically…
A novel type of photocontrollable Prussian blue (PB) magnetic nanoparticle has been designed and prepared by using the reverse micelle technique. These magnetic nanoparticles possess a well-organized nanoscale structure. Reversible photoisomerization of azobenzene chromophores realized photoswitching of the magnetizat…
Abstract Summary: Fabrication of honeycomb‐patterned films from amphiphilic dendronized block copolymer (PEO 113 ‐ b ‐PDMA 82 ) by ‘on‐solid surface spreading’ and ‘on‐water spreading’ method is reported. Highly ordered honeycomb films with quasi‐horizontally paralleled double‐layered structure can be fabricated by th…
Abstract A gas barrier and biodegradable multilayer material was processed with a paper substrate, chitosan, and carnauba wax. The first step consisted of the study of the chitosan coating to obtain a dense polymer layer at the paper surface. The influence of the molecular weight and the concentration of the chitosan…