Materials Literature
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A previously considered model interpreted a superconductor as an electron gas immersed in a medium with the dielectric constant $ε$ and a certain elasticity, which could be determined by measured sonic speed in the metal. The obtained expression of effective electron-electron interaction (EEI) potential unambiguously…
We consider theoretically liquid rise against gravity in capillaries with height-dependent cross-section. For a conical capillary made from a hydrophobic surface and dipped in a liquid reservoir, the equilibrium liquid height depends on the cone opening angle $α$, the Young-Dupré contact angle $θ$, the cone radius at…
We have investigated the inverted phase formation and the transition from inverted to normal phase for a cylinder-forming polystyrene- block -poly(methyl methacrylate) (PS- b - PMMA) diblock copolymer in solution-cast films with thickness about 300 nm during the process of the solution concentrating by slow solvent ev…
Abstract A one-dimensional (1D) polynuclear spin-crossover FeIII complex, [FeIII(acacen)(bpyp)]n(BPh4)n, showed a gradual and complete SC over a wide temperature range of ca. 250 K between S = 5/2 and S = 1/2, where acacen = N,N′-bis(acetylacetonato)ethylenediamine, bpyp = 1,3-bis(4-pyridyl)propane, and BPh4− = tetrap…
Particles adsorbed on the surface of a droplet form three-dimensional packings when the droplet evaporates. We study the final packings when the liquid droplet is attached to a solid substrate. In contrast to a droplet evaporating away from a substrate, here the final packings are highly dependent on both the number o…
Herein we report the synthesis of symmetrical bis(thieno[3,4- b ]thiophene)s and their electrochemical polymerization. The 2,2‘-bis(T34bT) has an oxidation peak at 0.73 V for electropolymerization whereas both 4,4‘-bisT34bT and 6,6‘-bisT34bT have peak oxidation potentials for polymerization at 0.49 and 0.53 V (0.44 V…
The polystyrene latex nanoparticles bearing silanol groups on their surfaces were successfully synthesized via miniemulsion polymerization using gamma-methacryloxypropyltrimethoxysilane (MPS) as the functional comonomer and oil-soluble AIBN as the initiator at neutral conditions. FTIR and 29Si NMR spectra showed that…
Molecular orientation distributions in the crystalline and amorphous regions were studied for uniaxially oriented poly( l -lactic acid) (PLLA) films using polarized Raman spectroscopy. By combining wide-angle X-ray diffraction and birefringence measurements, the tilt angle between the principal axis of the Raman tenso…
The preparation and characterization of two new five-coordinate, imidazole-ligated, high-spin iron(II) octaethylporphyrinates is described. [Fe(OEP)(1,2-Me2Im)] and [Fe(OEP)(2-MeHIm)] have been characterized by X-ray structure determinations and temperature-dependent Mössbauer spectroscopy in zero and applied magnetic…
Maleated ethylene/propylene copolymers (MAn- g -EPM) were thermoreversibly cross-linked via a reaction with primary alkylamines of different length, either with an equimolar amount to obtain the amide−acid or with an excess to obtain the amide−salt, which was confirmed using Fourier transform infrared (FTIR) spectrosc…
Abstract The morphology of cells cultured on carbon nanotube (CNTs) scaffolds was investigated using a confocal laser scanning microscope (CLSM) and a scanning electron microscope (SEM) and it was shown that the cells extended strikingly in all directions and numerous filopodia extended far from the cells.
Differential charging is often regarded as a problem in X-ray photoelectron spectroscopic studies, especially for insulating or partially conducting samples. Application of a positive bias can reduce the effect of differential charging by attracting stray electrons from the system, thereby compensating for the electro…
Ordered mesoporous carbon (OMC) selectively covered on the outer surface with polypyrrole (PPy) was prepared by removing the mesoporous silica template after the polymerization of pyrrole adsorbed on the surface of mesoporous silica−carbon composite. The amounts of PPys loaded on OMCs increased with the polymerization…
The sorption and desorption of a guest (1,2-dichloroethane) in syndiotactic polystyrene (s-PS) films, presenting three different kinds of uniplanar orientation ((010), (2̄10), or (002)) of the nanoporous host δ phase, have been investigated, mainly by Fourier transform infrared measurements. For guest uptake from dilu…
We performed molecular dynamics simulations of multilayer assemblies of flexible polyelectrolytes and nanoparticles. The film was constructed by sequential adsorption of oppositely charged polymers and nanoparticles in layer-by-layer fashion from dilute solutions. We have studied multilayer films assembled from opposi…
ZnO nanoneedle arrays have been grown on a large scale with a chemical vapor deposition method at 680 degrees C. Zn powder and O(2) gas are employed as source materials, and catalyst-free Si plates are used as substrates. Energy-dispersive X-ray and X-ray diffraction analyses show that the nanoneedles are almost pure…
Protected polyglycidols with a linear or star-shaped architecture were obtained via anionic ring-opening polymerization of protected glycidol in diglyme with potassium as counterion. Removal of the protecting groups lead to polyglycidols, which were used as multifunctional macroinitiators for the chemically and enzyma…
In order to understand the mechanisms behind the undesired aging of films based on vital wheat gluten plasticized with glycerol, films cast from water/ethanol solutions were investigated. The effect of pH was studied by casting from solutions at pH 4 and pH 11. The films were aged for 120 days at 50% relative humidity…
We derive coarse-grained models of polyethylene in the melt state with the aim to study polymer crystallization. This requires a low level of coarse-graining: We use a mapping of two CH2 groups onto one bead. The coarse-grained beads are connected with harmonic springs, an optimized angular potential, and an optional…
The interactions present in cyclic trinuclear coinage metal pyrazolates were studied computationally. Cuprophilic interaction was found to bind the singlet ground state of the dimer of trimers [[Cu(Pz)](3)](2), overcoming electrostatic repulsion. The large variation in intertrimer separations found in the literature f…