Materials Literature
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A new series of photocleavable protein cross-linking reagents based on bis(maleimide) derivatives of diaryl disulfides have been synthesised. They have been functionalised with cysteine and transient absorption spectra for the photolysis reaction have been recorded by using the pump-probe technique with a time resolut…
Static light scattering measurements from high molar mass poly( N -vinylimidazole) (PVI) in ethanol displayed strikingly different angular dependencies from the PVI samples below M w = 8 × 10 5 g/mol. The high molar mass particles were considered as aggregates. A classification of the aggregate structure became possib…
We report herein on the oriented growth of ZnO crystals on magnetite nanoparticles. The ZnO crystals were grown by hydrolyzing a supersaturated aqueous solution of zinc nitrate. The seeds for the growth were magnetite nanoparticles with a diameter of 5.7 nm and a narrow size distribution. Hollowed ZnO hexagons of 0.15…
With the view of understanding the low frequency (40-50 cm(-1)) motional processes in L-alanine around 4 K, we have carried out heat capacity (CP) and electron spin echo (ESE) measurements on L-alanine and L-alanine-d7. The obtained CP data show the so-called boson peak (seen as a maximum in CP/T3 versus T plots) in t…
First-principles calculations of nondefective VO in the $\mathrm{Fm}3\ifmmode\bar\else\textasciimacron\fi{}m$ structure based on a range of single-particle Hamiltonians containing varying amounts of exact exchange indicate that the ground electronic state is that of a ${d}^{3}$ high spin, antiferromagnetic (AF), Mott-…
In our prior study, we employed several in-situ techniques to investigate the thermal evolution of the structure of a Mg−Al−CO 3 layered double hydroxide (LDH) under an inert atmosphere and proposed a model to describe the structural evolution of the Mg−Al−CO 3 LDH structure. In this paper we present results of our on…
The photon transmission method was applied to study the scaling of thermal hysteresis at the nematic-smectic-A transition in a binary mixture of 4-ethoxy-4(')-(6-vinyloxyhexyloxyl) azobenzene monomer, smectogen, and 4-hexoxy-3(')-methly-4(')-(6-acryloyloxyhexyloxy) azobenzene. The thermal hysteresis loops were obtaine…
We compute the equilibrium concentration of stacking faults and point defects in polydisperse hard-sphere crystals. We find that, while the concentration of stacking faults remains similar to that of monodisperse hard-sphere crystals, the concentration of vacancies decreases by about a factor of 2. Most strikingly, th…
Zwei pyramidale Sulfitionen wirken als Template bei der Bildung neuer 18‐Molybdosulfit‐Dawson‐Cluster. Die Wechselwirkung zwischen den beiden SO 3 2− ‐Ionen wurde mit DFT‐Rechnungen untersucht. Das [Mo 18 O 54 (SO 3 ) 2 ] 4− ‐Ion ist das erste diskrete thermochrome Polyoxometallat: Es ändert seine Farbe von Hellgelb b…
In the present paper we succeeded in studying structural phase transitions from an atomistic point of view by positron annihilation Doppler broadening. This differs and is complementary to conventionally used diffraction experiments with large coherence lengths. In the exemplary case of the 1140 K order-disorder trans…
A novel chemistry has been developed for the production of capsules composed of a hydrophobic liquid core surrounded by a cross-linked polyacrylamide/alginate membrane. These liquid-core capsules may be used in capsular perstraction for the removal of inhibitory products from bioprocesses and bioconversions. They have…
Unusual properties (i.e., strong band dispersion, high carrier mobility, wide absorption-energy window, and sharp band-edge transition) that are desirable for hybrid-material electronics and for solar electric energy conversion are predicted to exist in the organic-inorganic chalcogenide single crystal ZnSe(C2H8N2)(1/…
Abstract Hyperbranched poly(amidoamine) (h-PAMAM)-grafted multi-walled carbon nanotubes (MWNTs) were successfully synthesized by grafting-from method. The modified MWNTs, which gave stable dispersion in organic solvents, were reacted with the fluorescein isothiocyanate (FITC) and then showed strong photoluminescent pr…
The effects of vacuum ultraviolet (VUV) treatment on surface chemical composition morphology and albumin adsorption for low-density polyethylene (LDPE) and high-density polyethylene (HDPE) were investigated. The attenuated total reflection-Fourier transform infrared (ATR-FTIR) spectra and contact angle measurements in…
Abstract Polypropylene (PP) was modified with elastomer or CaCO 3 particles of two different sizes (1 μm and 50 nm) in various volume fractions. The dispersion morphology and mechanical properties of the two systems were investigated as functions of the particle size and volume fraction of the modifier. The brittle‐to…
The charge density wave (CDW) transition temperature in the quasi-one-dimensional (Q1D) organic material $(\mathrm{Per}{)}_{2}\mathrm{Au}(\mathrm{mnt}{)}_{2}$ is relatively low ${(T}_{\mathrm{CDW}}\ensuremath{\sim}12\mathrm{K}).$ Hence in a mean field BCS model, the CDW state should be completely suppressed in magneti…
Reaction of CuX(2) (X(-)=Cl(-), Br(-), NO(3) (-)), NaOH, and 3[5]-tert-butylpyrazole (Hpz(tBu)) in a 1:1:2 molar ratio in MeOH at 293 K for three days affords [[Cu(3)(Hpz(tBu))(6)(mu(3)-X)(mu(3)-OH)(3)](2)Cu]X(6) (X(-)=Cl(-), 1; X(-)=Br(-), 2; X(-)=NO(3)(-), 3) in moderate yields. These compounds contain a centrosymme…
The effect of 2.5 MeV electron irradiation in situ at 4.2 K on the properties of single crystalline ZnO is studied by photoluminescence (PL) and optically detected electron paramagnetic resonance (ODEPR). A new PL band is produced by the irradiation, and several annealing stages are observed upon annealing to room tem…
The adhesion area and topology of spherical hollow polyelectrolyte shells adhering to flat glass or polyelectrolyte-covered glass surfaces are studied. Strong adhesion is found for anionic poly(sodium 4-styrenesulfonate)-terminated shells on cationic poly(ethylene imine)-covered glass, while no adhesion of those shell…
The thermal expansion behavior of thin polycarbonate (PC) films supported on hydrophilic and hydrophobic silicon substrates is studied with specular X-ray reflectivity. These measurements suggest a suppression of the apparent glass transition temperature ( T g ) with decreasing film thickness h on hydrophilic silicon…