Materials Literature
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An efficient one-pot synthesis of hairy nanoparticles was developed by applying ATRP to a two-step sequential emulsion copolymerization. The first step was a microemulsion ATRP of methyl methacrylate (MMA) monomer and ethylene glycol dimethacrylate (EGDMA) cross-linker, leading to uniform nanogels with hydrodynamic di…
The new metalloporphyrin Pt(tptnp), where tptnp = tetraphenyltetranaphtho[2,3]porphyrin, has been prepared and subjected to photophysical and electrooptical device studies. In degassed toluene solution at room temperature Pt(tptnp) features efficient phosphorescence emission with lambda(max) 883 nm with a quantum effi…
A variety of shape-controlled TiO 2 nanoparticles, such as spheres, short ellipsoidal rods with a low aspect ratio (low AR), and long ellipsoidal rods with a high aspect ratio (high AR), were synthesized by a gel−sol method. X-ray diffractometer and ultraviolet diffuse reflectance spectroscopy analyses revealed that t…
A new generation of porous polymers was made for various energy-related applications, e.g., as fuel cell membranes, as electrode materials for batteries, for gas storage, partly from renewable resources. This review intends to catch this emerging field by reporting on a variety of different approaches to make high per…
Two-photon polymerization has been employed to fabricate three-dimensional structures using the biodegradable triblock copolymer poly(epsilon-caprolactone-co-trimethylenecarbonate)-b-poly(ethylene glycol)-b-poly(epsilon-caprolactone-co-trimethylenecarbonate) with 4,4'-bis(diethylamino)benzophenone as the photoinitiato…
We have investigated the behavior of free charge carriers in a bent piezoelectric semiconductive nanowire under thermodynamic equilibrium conditions. For a laterally bent n-type ZnO nanowire, with the stretched side exhibiting positive piezoelectric potential and the compressed side negative piezoelectric potential, t…
We describe a complete implementation of all-atom protein molecular dynamics running entirely on a graphics processing unit (GPU), including all standard force field terms, integration, constraints, and implicit solvent. We discuss the design of our algorithms and important optimizations needed to fully take advantage…
The flotation of small polymer disks in lower-density liquids was studied. A disk or rod was placed in a clear container, and liquid was slowly added. The progression of liquid rising and ultimately floating or engulfing the rod was observed. It was found that the maximum rod length that would float on a given liquid…
Abstract Tellurates are rare minerals as the tellurate anion is readily reduced to the tellurite ion. Often minerals with both tellurate and tellurite anions are found. An example of such a mineral containing tellurate and tellurite is yecoraite. Raman spectroscopy has been used to study this mineral, the exact struct…
The X-band electron paramagnetic resonance (EPR) technique and the model analysis of the EPR linewidth versus temperature were employed to characterize the dopant distribution in a number of La-manganite crystals, low doped with Ca, Sr, and Ba. Such distribution appears to be inhomogeneous in accordance with the resul…
Oligothiophene-bridged zinc-tin bisporphyrinates were synthesized. Their absorption spectra have been analyzed in terms of exciton interaction and porphyrin-bridge coupling by through-bond interaction and the steady-state fluorescence spectra in terms of differential Stokes shifts for the electron-donating zinc and th…
We introduce a simple and robust method for varying the phase of the patterns in transfer printing of polyelectrolyte multilayers. Simply transferred positive patterns, edge-defined intermediate patterns, and negatively engraved patterns were obtained by manipulating the capillarity of the plasticized polymeric layer…
We successfully developed a method to control the introduction of Pd nanoparticles selectively into the poly(2-vinylpyridine) (P2VP) microdomains of polyisoprene- block -poly(2-vinylpyridine) (PI- b -P2VP) diblock copolymer. The technique consists of three steps: (i) cross-linking of P2VP microdomains with diiodobutan…
Investigation of one anhydrous and four hydrated forms of a pharmaceutical compound ( 1 ) using both single-crystal and high-resolution powder X-ray diffraction methods revealed a two-dimensional framework which, upon exposure to moisture, absorbed water between the layers, causing the lattice to expand by as much as…
Abstract Composite polyacrylate latex particles were prepared through a simple method by dissolving organosilicon monomer methyltrimethoxysilane in a monomer mixture of acrylic monomers methyl methacrylate (MMA), n‐butyl acrylate (n‐BA), and acrylic acid (AA). With the addition of water needed for hydrolysis, methyltr…
A facile one-pot microemulsion method has been developed for the synthesis of spherical silver core-silica shell (Ag@SiO2) nanoparticles with europium chelates doped in the shell through a silane agent. The method is significantly more straightforward than other extant methods. Measurements of the luminescent emission…
Abstract A novel epoxy resin modifier, phosphorus‐containing epoxide siloxane (DPS) with cyclic phosphorus groups in the SiO network, was prepared from the reaction of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) with polyhedral‐oligomeric siloxanes, which was synthesized by the sol–gel reaction of 3‐gly…
Abstract Let 𝒯 be an aperiodic and repetitive tiling of ℝdwith finite local complexity. We present a spectral sequence that converges to theK-theory of 𝒯 with page-2 given by a new cohomology that will be called PV in reference to the Pimsner–Voiculescu exact sequence. It is a generalization of the Serre spectral sequ…
Abstract Blocked mercaptosilane possessing two functionally active end groups can chemically react with both silica and rubber leading to significant improvement in silica‐filled vulcanizate products. The effect of the novel blocked mercaptosilane (3‐propionylthio‐1‐propyltrimethoxylsilane) (called hereafter PXT) on t…
Abstract The effect of pristine silica nanoparticles on the dynamic and capillary rheology of a model LDPE‐EVA thermoplastic elastomeric system is explored in this paper. The pristine silica nanoparticles were melt‐blended with the LDPE‐EVA system at 1.5, 3, and 5 wt% loadings, respectively, by varying the sequence of…