Materials Literature
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Abstract Deposition of SiO x layers by low‐pressure microwave plasmas is an excellent means to add missing barrier functionalities to cheap and material‐saving homo‐polymeric materials that will increasingly replace expensive multi‐layer polymer food packaging. SiO x coatings were deposited in an ECR plasma process on…
We report a high-pressure tetragonal PbO-type structure $(B10)$ of ZnO predicted through ab initio lattice-dynamics calculation. This structure can be directly transformed from NaCl structure $(B1)$ along an orthorhombic $Pmmn$ transition path and can be viewed as alternatively stacked layers of cations and anions wit…
A theory of nuclear spin relaxation in isotropic liquids for nuclear spins interacting with electron spins, residing in other molecules (the outer-sphere relaxation), is presented. The approach, valid outside of the Redfield limit for electron spin relaxation, is an extension of the Swedish slow motion theory [Benetis…
Abstract Donor1+donor2→acceptor : The second‐order NLO molecular properties of a class of dipolar chromophores that incorporate the following design elements are investigated: 1) a substituted hydrazono moiety as a strong donor; 2) a pyrrole ring as an auxiliary donor; 3) strong acceptor groups (see figure). Their fir…
Hybrid nanofibers from chitosan or N-carboxyethylchitosan (CECh) and silver nanoparticles (AgNPs) were prepared by electrospinning using HCOOH as a solvent. AgNPs were synthesized in situ in the spinning solution. HCOOH slowed down the cross-linking of the polysaccharides with GA enabling the reactive electrospinning…
Using Newtonian and Brownian dynamics simulations, the structural and transport properties of hard and soft spheres have been studied. The soft spheres were modeled using inverse power potentials (V approximately r(-n), with 1n the potential softness). Although, at constant density, the pressure, diffusion coefficient…
Presented herein is an investigation into the buckling behavior of single-walled carbon nanotubes (SWCNT) subjected to axial compression and torsion at high temperatures. This study is carried out by performing molecular dynamics (MD) simulations at both room temperature and extremely high temperatures. It is observed…
Ceramic samples of monoclinic and cubic modifications of ternary perovskite BaFe 1/2 Nb 1/2 O 3 have been obtained by solid-state reaction route. Mossbauer 57 Fe spectra and Neel temperature values appeared to be very similar for both modifications. The values and temperature dependences of the dielectric permittivity…
We present a fluorescence-based assay for the characterization of functionalized gold nanoparticles (AuNPs) capped with a self-assembled monolayer of mixed thiols derived from poly(ethylene glycol) (PEG). These water-soluble AuNPs carry primary amino groups at the solvent-exposed interface, which can be used for furth…
Abstract Ultra‐fine fiber mats of poly( L ‐lactic acid) containing gallic acid were prepared by electrospinning from gallic acid‐containing PLLA solution in 7:3 v/v dichloromethane (DCM)/ N , N ‐dimethylformamide (DMF). The amount of the as‐loaded gallic acid was 40% w/w (based on the weight of PLLA in the solution) o…
We have investigated anisotropic physical properties (magnetic susceptibility, electrical resistivity, thermoelectric power, Hall coefficient, and thermal conductivity) of the $o{\text{-Al}}_{13}{\text{Co}}_{4}$, an orthorhombic approximant to the decagonal phase. The crystallographic-direction-dependent measurements…
Abstract The results of silicon oxide permeation barrier coating and plasma sterilization are shown using a low‐pressure microwave plasma reactor system based on a Plasmaline antenna developed for the treatment of polyethylene terephthalate bottles and foils. The influence of the coating composition on the barrier pro…
Cerium 4f level occupation determines the properties of cerium oxide based catalysts in a significant way. The Ce 4f level of nanosized cerium oxide particles was investigated with the use of resonant photoelectron spectroscopy in the Ce 4d-4f photoabsorption region. A strong interaction of ceria with different additi…
We synthesized weakly itinerant ferromagnet with layered structure LaCoAsO and measured the isothermal magnetizations at various temperatures. The isothermal magnetizations in a form of Arrott plot for weakly itinerant ferromagnets such as ${\text{ZrZn}}_{2}$, ${\text{Sc}}_{3}\text{In}$, ${\text{Ni}}_{3}\text{Al}$, an…
Using high-resolution dilatometry, we study the thermodynamic response of the lattice parameters to superconducting order in a self-flux grown $\mathrm{Ba}({\mathrm{Fe}}_{0.92}{\mathrm{Co}}_{0.08}{)}_{2}{\mathrm{As}}_{2}$ single crystal. The uniaxial-pressure dependencies of the critical temperature ${T}_{c}$ calculat…
Sexual reproduction is an obligatory phase in the life cycle of most diatoms, as cell size decreases with successive vegetative divisions and the maximal cell size is only restored by a specialized cell, the auxospore, which follows zygote formation as a result of sexual reproduction. While in pennate diatoms the indu…
Abstract In this work, a series of WC/C nanostructured films were deposited on silicon substrates by changing the ratio of sputtering power applied to graphite and WC magnetron sources ( P C / P WC : 0, 0.1, 0.5, 1). The thermal stability of WC/C coatings was followed in situ by means of X‐ray diffraction measurements…
Induction of matrix metalloproteinase (MMP)-9 is particularly important for the invasiveness of breast cancers. We investigated the inhibitory effect of kalopanaxsaponin A (KPS-A) on cell invasion and MMP-9 activation in phorbol 12-myristate 13-acetate (PMA)-treated MCF-7 human breast cancer cells. KPS-A inhibited PMA…
Composite nanocoating of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT-PSS) and aqueous dispersion of carbon nanotubes (CNT-PSS) on lignocellulose wood microfibers has been developed to make conductive microfibers and paper sheets. To construct the multilayers on wood microfibers, cationic poly(ethyle…
This article describes a design strategy deployed in developing ultra-ductile Mg alloys based on a microalloying concept, which aims to restrict grain growth considerably during alloy casting and forming. We discuss the efficiency of the design approach, and evaluate the resulting microstructural and mechanical proper…