Materials Literature
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Abstract Nanostructured, transparent, and thermosensitive membranes synthesized by bicontinuous microemulsion polymerization of N ‐isopropylacrylamide (NIPAAm), methyl methacrylate (MMA), and 2‐hydroxyethyl methacrylate (HEMA) using a polymerizable nonionic surfactant, ω‐methoxy poly(ethylene oxide) 40 undecyl α‐metha…
Abstract Polyurethane Networks (PUNs) were synthesized using polyols derived from soybean oil, petroleum, or a blend of the two in conjunction with diisocyanate. The soybean‐based polyols (SBPs) were prepared using air oxidation, or by hydroxylating epoxidized soybean oil. Some of the networks were subjected to severa…
Abstract The spectroscopic and near‐field scanning optical microscopy (NSOM) studies of phosphorescent films doped with colloidal gold nanoparticles (NPs) are presented. Films with a high concentration of 2,3,7,8,12,13,17,18‐octaethyl‐21 H ,23 H ‐porphine platinum( II ) dispersed in a neutral polymer poly[(methyl meth…
Our first principles calculations predict a tetragonal ${\mathrm{BC}}_{3}$ $(t\text{\ensuremath{-}}{\mathrm{BC}}_{3})$ phase originating from the cubic diamond structure. The $t\text{\ensuremath{-}}{\mathrm{BC}}_{3}$ structure is formed by alternately stacking sequence of metallic CBC and insulating CCC blocks, exhibi…
Dislocation patterns have been characterized by transmission electron microscopy and Kikuchi line analysis in pure, polycrystalline aluminium deformed in tension at room temperature in the strain range 0.05–0.34. The angle strain relationship of the dislocation boundaries, their scaling behaviour and the occurrence of…
A method based on the conventional lithographic technique combined with the layer-by-layer (LBL) assembly process is applied to the construction of free-standing micro- and nanostructured matrixes. The method enables controlled shaping and considerable chemical and mechanical stability of the self-assembled monolayers…
The crystallization of paracetamol from ethanol and methanol solutions was used to examine the possibility of using rapid cooling in a tubular flow-through apparatus to manipulate crystal size distribution and morphology. Flow through the tubular portion of the apparatus was laminar, and hence, the device, including a…
We report on the magnetic properties of Co$\_x$Pt$\_{1-x}$ clusters embedded in various matrices. Using a careful analysis of magnetization curves and ZFC susceptibility measurements, we determine the clusters magnetic anisotropy energy (MAE) and separate the surface and volume contributions. By comparing different ch…
We show that SIS Josephson junctions have a threshold resistance, above which the Josephson coupling and the supercurrents become extremely small, due to the shrinking of the Cooper pair size during the Josephson tunneling. Accordingly, the threshold resistance is smaller for higher Tc superconductors with small Coope…
Using the functional-integral method we investigate the effective dynamics of a charged particle coupled to a set of two-level systems as a function of temperature and external electric field. The optical conductivity and the direct current (dc) resistivity induced by the reservoir are computed. Three different regime…
It's under control: In the presence of an artificial double-hydrophilic block copolymer, poly(ethylene glycol)-b-poly(L-glutamic acid), highly monodisperse vaterite microspheres crystallize from a mixture of N,N-dimethylformamide and water (see picture). Varying the ratio of the solvents can control the morphology of…
Polyhydroxyalkanoates (PHA) containing block copolymers were synthesized in Cupriavidus necator using periodic substrate addition. Poly(3-hydroxybutyrate) (PHB) segments were formed during fructose utilization. Pulse feeds of pentanoic acid resulted in the synthesis of 3-hydroxyvalerate monomers, forming poly(3-hydrox…
The crystallization kinetics of colloidal hard spheres was studied using a special Bragg spectrometer with high sensitivity. In contrast with the classical scenario we observe a two-step nucleation process: the number of crystallites increases slowly at early times, followed by a dramatic reduction at intermediate tim…
An approach based on a lattice version of the Boltzmann kinetic equation for describing multi-phase flows in nano- and micro-corrugated devices is proposed. We specialize it to describe the wetting/dewetting transition of fluids in presence of nanoscopic grooves etched on the boundaries. This approach permits to retai…
The atomic-level control achievable in artificially structured oxide superlattices provides a unique opportunity to explore interface phases of matter including high-density two-dimensional (2D) electron gases. Electronic-structure calculations show that the charge distribution introduced by ${\mathrm{LaTiO}}_{3}$ mon…
An electrospun cardiovascular graft composed of polydioxanone (PDO) and elastin has been designed and fabricated with mechanical properties to more closely match those of native arterial tissue, while remaining conducive to tissue regeneration. PDO was chosen to provide mechanical integrity to the prosthetic, while el…
The energy of a large number of oxidation reactions of $3d$ transition metal oxides is computed using the generalized gradient approach (GGA) and $\mathrm{GGA}+\mathrm{U}$ methods. Two substantial contributions to the error in GGA oxidation energies are identified. The first contribution originates from the overbindin…
An analysis of the effect of microcracks in porous metals on amplitude-dependent internal friction (ADIF) is carried out. A mathematical model is developed, which takes into account an initial distribution of microcracks lengths defining subsequent crack growth during cycling. Using the Dugdale model, the linear densi…
We study one-dimensional systems constructed from a segment by employing the Cantor-set rule up to an arbitrary stage of self-similar patterns. The rigorous expression of the transfer matrix to describe the electromagnetic waves propagating through them is presented. As displayed by numerical demonstration, the transm…
A highly ordered dot array pattern of surface micelles on water is formed by a spread monolayer of an amphiphilic block copolymer, polystyrene-block-poly(4-vinylpyridine) (PS-4VP), via hybridization with a liquid crystal molecule, 4'-pentyl-4-cyanobiphenyl (5CB), on water. Simple co-spreading of PS-4VP with 5CB provid…