Materials Literature
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Superhydrophobic and self-cleaning surfaces may arise due to interplay between nano/microstructures at the solid surface and the chemical properties of the topmost monolayer. In the present work, those relationships were investigated by Al substrate modifications via chemical functionalization with trimethoxypropylsil…
Degradation of a water-soluble polyphosphazene, poly[di(carboxylatophenoxy)phosphazene], disodium salt (PCPP) has been studied in aqueous solutions at elevated temperature. This synthetic polyelectrolyte is of interest as vaccine adjuvant and its degradability constitutes an important component of its safety and formu…
The oleaginous yeast Yarrowia lipolytica possesses six acyl-CoA oxidase (Aox) isoenzymes encoded by genes POX1-POX6. The respective roles of these multiple Aox isoenzymes were studied in recombinant Y. lipolytica strains that express heterologous polyhydroxyalkanoate (PHA) synthase (phaC) of Pseudomonas aeruginosa in…
Abstract The morphology and thermal stability of bead‐free and uniform electrospun pure polystyrene (PS) and PS/Ni nanocomposite fibers are investigated by SEM and TGA/DSC. A higher thermal stability is observed after introducing the nanoparticles in the polymer fibers. FT‐IR analysis indicates a physical entanglement…
The novel phenomena induced by symmetry breaking at homointerfaces between ferroic variants in ferroelectric and ferroelastic materials have attracted recently much attention. Using variable temperature scanning microwave microscopy, we demonstrate the mesoscopic strain-induced metal-insulator phase transitions in the…
A metamaterial-liquid crystal cell structure is fabricated with the metamaterial as one of the liquid crystal alignment layers. Nano-sized double-split ring resonator in the metamaterial accommodates two distinct resonances in the near infrared regime. By adopting an azo-nematic liquid crystal in a twisted nematic liq…
Ein organischer Käfig für Kohlenstoff: Ein formpersistenter, organischer prismatischer molekularer Käfig (siehe Struktur) wurde in einem Schritt und in hoher Ausbeute aus einfach zugänglichen Ausgangsmaterialien mithilfe dynamischer kovalenter Verknüpfungsreaktionen hergestellt. Dieses Käfigmolekül adsorbiert hoch sel…
The suitability of high temperature techniques was investigated by finite element analysis modelling to give a qualitative view of how the thermal picture develops under a diamond indenter without controlled heating of the diamond. In the case of a low-conductivity sample such as fused silica, the thermal gradient bel…
Separation of single-walled carbon nanotubes (SWNTs) according to their handedness has been attracting growing interest. Our methodology to separate the enantiomers of SWNTs is based on molecular recognition with chiral diporphyrin nanotweezers. Herein, we report novel nanotweezers 1 consisting of two chiral porphyrin…
Highly stable and crystalline mesoporous TiO2 materials have been successfully synthesized by a simple surfactant sulfuric acid carbonization method by using Pluronic triblock copolymers as a template (see figure). The surfactant template is first carbonized by H2SO4 to obtain rigid carbon on the surface of mesochanne…
Abstract BACKGROUND: The influence of different hydrating agents on the pH of the hydrating solutions, rate of hydration of MgO to Mg(OH) 2 and product surface area was studied as a function of temperature of hydration. Hydrating agents used were aqueous solutions of ammonium chloride, magnesium acetate, magnesium nit…
We studied carrier dynamics in semiconductor nanocrystals consisting of a small CdSe dot embedded in an elongated, rod-shaped CdS shell, using the ultrafast pump-probe technique. We found clear evidence of a substantial suppression of the Auger nonradiative recombination in the biexciton regime. Moreover, a simple mod…
We report on photoluminescence of Sr(2)P(2)O(7):Bi(2+) as a potential red-emitting phosphor for multichromatic light sources. If excited with blue light, photoluminescence of this compound spans the spectral range of about 600 to 760nm. Static and dynamic spectral data reveal the presence of two distinct emission cent…
Fabrication and characterization of the first large area metamaterial structures patterned on free-standing biocompatible silk substrates is reported. Strong resonance responses at terahertz frequencies are shown, providing a promising path towards the development a new class of metamaterial-inspired bioelectric and b…
New liquid-crystalline materials were prepared by self-assembly driven by halogen bonding between a range of 4-alkoxystilbazoles, 4-alkyl-, and 4-alkoxy-substituted pyridines as halogen-bonding acceptors, and substituted derivatives of 4-iodotetrafluorophenyl as halogen-bonding donors. Despite the fact that the starti…
Endohedral fullerenes encapsulating a spin-active atom or ion within a carbon cage offer a route to self-assembled arrays such as spin chains. In the case of metallofullerenes the charge transfer between the atom and the fullerene cage has been thought to limit the electron spin phase coherence time $({T}_{2})$ to the…
We demonstrate an efficient photon number detector for visible wavelengths using a silicon avalanche photodiode. Under subnanosecond gating, the device is able to resolve up to four photons in an incident optical pulse. The detection efficiency at 600 nm is measured to be 73.8%, corresponding to an avalanche probabili…
A novel intumescent flame retardant (IFR) poly(butylene succinate) (PBS) with an antidripping property using fumed silica as a synergistic agent was prepared. Ammonium polyphosphate, melamine, and fumed silica were added in PBS via melt blending. It was revealed that the flame retardant PBS exhibited both excellent fl…
Standing spin waves in a thin film are used as sensitive probes of interface pinning induced by an antiferromagnet through exchange anisotropy. Using coplanar waveguide ferromagnetic resonance, pinning of the lowest energy spin wave thickness mode in Ni(80)Fe(20)/Ir(25)Mn(75) exchange biased bilayers was studied for a…
Solid oxygen is a unique molecular crystal whose phase diagram is mostly imposed by magnetic ordering, i.e., each crystal phase has a specific magnetic structure. However, recent experiments showed that high-pressure $δ$-phase is implemented in different magnetic structures. In the present paper we study the role of i…