Materials Literature
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The morphology evolution of poly(styrene−ethylene/butylene−styrene) monolayer thin films upon “annealing” in the vapor of cyclohexane, a selective solvent for majority poly(ethylene/butylene) block, was investigated by atomic force microscopy (AFM). The pathway information on the two-dimensional ordering from poorly o…
The crystallization kinetics of mullite formation in a diphasic precursor consisting of a silicone resin filled with commercial γ‐alumina nanoparticles (15 nm mean particle size, specific surface area of 100 m 2 /g), heated in air from 1250° to 1350°C, was studied by X‐ray diffraction. Transitional γ‐alumina and amorp…
We present a numerical method that consistently implements thermal fluctuations and hydrodynamic interactions to the motion of Brownian particles dispersed in incompressible host fluids. In this method, the thermal fluctuations are introduced as random forces acting on the Brownian particles. The hydrodynamic interact…
Abstract Cell‐adhesive and cell‐repulsive coatings have been plasma‐deposited on poly(ethylene terephthalate) surfaces previously structured with nano‐metric conical features by means of colloidal lithography. Surface analysis revealed that both coatings are conformal on nano‐structured substrates, with their wettabil…
We performed density-functional calculations aimed to investigate the adsorption mechanism of a single pyridine $({\text{C}}_{5}{\text{H}}_{5}\text{N})$ molecule on Cu(110) and Ag(110) surfaces. Our ab initio simulations show that, in the ground state, the pyridine molecule adsorbs with its molecular plane perpendicul…
Abstract Biodegradable polyurethane (PU) elastomers with potential for biomedical and industrial applications with tunable thermal properties were synthesized by the reaction of poly(ϵ‐caprolactone) and 4,4′‐diphenylmethane diisocyanate and extended with different mass ratios of chitin and 1,4‐butane diol (BDO). Their…
A Shockwave Power Reactor consisting of an annulus with a rotating pock-marked inner cylinder was used to induce hydrodynamic cavitation in calcium-fortified apple juice flowing in the annular space. Lethality on Saccharomyces cerevisiae was assessed at processing temperatures of 65 and 76.7 degrees C. Details of the…
Abstract The degradation behavior of an elastomeric polyurethane (PU) was investigated with accelerated ultraviolet (UV) and hygrothermal (HT) techniques. Samples were subjected to UV exposure and HT conditions for 3 or 5 months and were removed in 1‐month intervals from the test chambers. Their chemical structure was…
In designing new biomaterials, it is of outstanding importance to consider how cells respond to specific chemical and topographical features on the material surface. The behavior of most cell types in vivo is strictly related to specific chemical and topographical cues that characterize the extra cellular environment.…
Sticking together: Diblock molecules containing a Y-shaped aromatic segment with a linear poly(ethylene oxide) head and branched alkyl chains at the tail have been synthesized. Cylindrical fibers are formed by the aggregation of these molecules in aqueous solution (see picture). Intercalation of an aromatic guest indu…
Photodeposition of Ag, Cu, Cu 2 O, and MnO 2 at a TiO x nanosheet with a lepidocrocite-type structure prepared from K 0.8 Ti 1.73 Li 0.27 O 4 was carried out to observe the active sites for the photocatalytic reaction during UV illumination. Photodepositions of Ag, Cu, and Cu 2 O, that is, photoreduction, occurred mai…
The use of chitosan microparticles as injectable carriers for cell transplantation represents a promising alternative to avoid the drawbacks of the implantation of other forms of three-dimensional (3D) scaffolds seeded with cells. In this study, a 3D construct is obtained in vitro by combining chitosan microparticles…
Superconductivity in carbon nanotubes (CNTs) is attracting considerable attention. However, its correlation with carrier doping has not been reported. We report on the Meissner effect found in thin films consisting of assembled boron (B)-doped single-walled CNTs (B-SWNTs). We find that only B-SWNT films consisting of…
For a sample of an arbitrary shape, the dependence of its conductance on the longitudinal and Hall conductivity is identical to that of a rectangle. We use analytic results for a conducting rectangle, combined with the semicircle model for transport coefficients, to analyze the properties of the graphene monolayer and…
This paper presents a simple and low-cost method to prepare hollow silica spheres. This method is just based on a PVP-involved emulsion polymerization and subsequent sol−gel process. PVP first participated in the polymerization reaction as a stabilizer or surfactant and then played a coupling agent role in the latter…
The adsorption and reaction of methanol and formaldehyde on two-dimensional PdZn alloys on a Pd(111) surface were studied as a function of the Zn content in the alloy in order to understand the role of Zn in Pd/ZnO catalysts for the steam reforming of methanol (SRM). Temperature programmed desorption (TPD) and high re…
Abstract Many new materials have been identified as being of potential interest to solid oxide fuel cell developers. Recent work has suggested that materials of the La 2 NiO 4 composition possess sufficient activity to act as an effective cathode. Whilst there have been many studies of the transport properties of mate…
No template and no organic medium are needed for the low-temperature, one-pot aqueous route to layered manganese oxides with a hierarchical core–corona architecture (see picture). Particle formation occurs by a two-step precipitation process with two different kinetics.
Abstract Polyurethane foams were prepared from the liquefied cornstalk polyol, which was obtained by the liquefaction of cornstalk in the presence of polyhydric alcohols using sulfuric acid as catalyst. The advisable liquefaction reaction conditions were selected by investigating their influences on the properties of…
Abstract In this article, shear rheology of solutions of different concentrations obtained by dissolution of cellulose in the ionic liquid (IL) solvent 1‐butyl‐3‐methylimidazolium chloride ([Bmim]Cl) was studied by measuring the complex viscosity and dynamic moduli at different temperatures. The obtained viscosity cur…