Materials Literature
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In this study, silver nanoparticles were formed on a natural macroporous matrix, the stem of rice-paper plant, by reducing Ag+ in aqueous solution through in situ processing without using any other stabilizers. The pores of the matrix, with their size of about 100 µm, were thought to act as reaction compartments for t…
We consider a supramolecular diblock copolymer melt in which two homopolymers of different species can reversibly bond at terminal binding sites to form a diblock copolymer. The grand canonical ensemble is particularly convenient for formulating field-theoretic models of supramolecular assembly because the chemical eq…
A thermally activated photoluminescence memory effect, induced by a reversible order–disorder phase transition of the alkyl chains, is reported for highly organized bilayer alkyl/siloxane hybrids (see figure; left at room temperature, right at 120 °C). The emission energy is sensitive to the annihilation/formation of…
Abstract A comparative study for the fitting of X‐ray photoelectron spectra (XPS) using different model functions is presented. Synthetically generated test spectra using Gaussian/Lorentzian convolution and a real measured spectrum are fitted with the three commonly used models: product, sum and Gaussian/Lorentzian co…
Paramagnetic particles in a liquid above a solid dynamically self-assemble into two-dimensional (2D) viscoelastic clusters in a processing magnetic field if the precession angle exceeds the magic angle. Hexagonal clusters rotate with a frequency proportional to the precession frequency of the magnetic field. The rotat…
Vertically aligned ZnO nanorod arrays with a diameter of 40–150 nm were fabricated on Al 2 O 3 substrates with and without GaN interlayers, and consequently covered with a ZnO film in situ by a catalyst-free metal–organic vapour phase epitaxy method. X-ray diffraction and transmission electron microscopy measurements…
We report on the linear viscoelastic properties of a family of entangled linear thermoplastic nonpolar hybrid inorganic−organic polymers: random copolymers of polystyrene (PS) and styryl-based polyhedral oligosilsesquioxane (POSS), R 7 (Si 8 O 12 )(C 6 H 4 CH CH 2 ), with R = isobutyl ( i Bu). A series of styrene−styr…
Nanofibres and nanocomposites are highly promising recent additions to materials in relation to tissue engineering. Mimicking the architecture of an extracellular matrix is one of the major challenges for tissue engineering. An operationally simple electrospinning technique was used to fabricate polycaprolactone/nanoh…
Electronic structure calculations using various methods, up to the coupled-cluster CCSD(T) level, in conjunction with the aug-cc-pVnZ basis sets with n = D, T, and Q, extrapolated to the complete basis set limit, show that the borane molecule (BH3) can act as an efficient bifunctional acid-base catalyst in the H2 elim…
Many types of fluorescent nanoparticles have been investigated as alternatives to conventional organic dyes in biochemistry; magnetic beads also have a long history of biological applications. In this work we apply flame spray pyrolysis in order to engineer a novel type of nanoparticle that has both luminescent and ma…
Semiconducting nanoparticles are the building blocks of optical nanodevices as their electronic states, and therefore light absorption and emission, can be controlled by modifying their size and shape. CdSe is perhaps the most studied of these nanoparticles, due to the efficiency of its synthesis, the high quality of…
The paper reports on the preparation of superhydrophobic amorphous silicon oxide nanowires (a-SiONWs) on silicon substrates with a contact angle greater than 150 degrees by means of surface roughness and self-assembly. Nanowires with an average mean diameter in the range 20-150 nm and 15-20 microm in length were obtai…
The paper provides the literature data on heterogeneous catalysts for catalytic wet air oxidation (CWAO). A survey of investigations on process mechanism and kinetics of the CWAO is presented. The performance of various reactors types is analyzed using experimental data and results of simulations. Monolithic catalysts…
Abstract A commercially available aliphatic thermoplastic polyurethane formulated with a methylene bis(cyclohexyl) diisocyanate hard segment and a poly(tetramethylene oxide) soft segment and chain‐extended with 1,4‐butanediol was dissolved in dimethylformamide and mixed with dispersed single‐walled carbon nanotubes. T…
A formulation is developed for the calculation of the electromagnetic--fluctuation forces for dielectric objects of arbitrary geometry at small separations, as a perturbative expansion in the dielectric contrast. The resulting Lifshitz energy automatically takes on the form of a series expansion of the different many-…
Electrons with spin-orbit coupling moving in mesoscopic structures can often exhibit local spin polarization. In this paper, we study the influence of the Rashba coupling on the scattering of two-dimensional electrons from a circular disk. It is observed that spin-polarized regions exist, even if the incident electron…
We develop an analytic and environment-dependent interatomic potential for the overlap repulsion in solid argon, based on an approximate treatment of the non-orthogonal Tight-Binding theory for the closed-shell systems. The present model can well reproduce the observed elastic properties of solid argon including Cauch…
The vibrational properties of a high-quality realistic model of amorphous silicon are examined. The longitudinal and transverse dynamical structure factors are calculated, and fitted to a damped harmonic oscillator (DHO) function. The width $Γ$ of the best-fit DHO to the longitudinal dynamical structure factor scales…
Atomic-resolution electron microscope images show that a quasicrystal is a quasiperiodic packing of clusters. The outer atomic shells of multi-shell clusters occuring in quasicrystals are highly symmetric and rather robust, but some structural disorder may be present around the core. The models describing quasicrystal…
We use our recently proposed microscopic modeling in the framework of linear response theory to investigate the complete phonon dispersion, the phonon density of states, certain phonon-induced electronic charge distributions and charge fluctuations (CF's) for anomalous soft modes of metallic BaBiO$_{3}$ in its simple…