Materials Literature
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This article deals with the controlled crystallization of solgel‐derived glasses, glassy films, and amorphous gels, emphasizing some of the authors' own work on silica‐based films for optical and photonic applications. The review includes a discussion of crystallization processes in gels and solgel‐derived glasses com…
AIM: This study was designed to investigate the cytotoxicity of multiwalled carbon nanotube buckypaper (BP) in stimulated human peripheral blood lymphocytes. Materials & methods & results: BP treatment led to a delay in the cell growth, as proven by a minor increase in the cell number over time relative to that seen i…
The TTTA⋅Cu(hfac)2 polymer (1; in which TTTA = 1,3,5-trithia-2,4,6-triazapentalenyl, and hfac = (1,1,1,5,5,5)-hexafluoroacetylacetonate) is one of the most prominent examples of the rational use of the 'metal-radical' synthetic approach to achieve ferromagnetic interactions. Experimentally, the magnetic topology of 1…
We investigate by molecular dynamics simulation a system of N particles moving on the surface of a two-dimensional sphere and interacting by a Lennard-Jones potential. We detail the way to account for the changes brought by a nonzero curvature, both at a methodological and at a physical level. When compared to a two-d…
A simple, single-step, one pot method was developed for the synthesis of monodispersed, ultralow sized, water-dispersible, stable, positively charged gold nanoparticles using the branched polyethlyneimine (PEI) in an aqueous media. Sizes of the gold nanoparticles have been tuned by adjusting the concentration of PEI a…
Selected results on the environment around Zr, Ti, and Ni in glasses and glass‐ceramics using X‐ray absorption spectroscopy ( XAS ) are presented to illustrate how this technique can provide information on the nucleation/crystallization processes. These elements actively participate to nucleation and, additionally, so…
Silkworm's silk is natural biopolymer with unique properties including mechanical robustness, all aqueous base processing and ease in fabrication into different multifunctional templates. Additionally, the nonmulberry silks have cell adhesion promoting tri-peptide (RGD) sequences, which make it an immensely potential…
Abstract Porous nanocomposite films based on polypropylene (PP) and titanium dioxide (TiO2) nanoparticles were prepared by melt extrusion followed by uniaxial stretching. The effects of drawing temperature, extension rate, stretching ratio and composition of the base films on the final properties and microstructure of…
Injection-molded poly(lactic acid)/organo-montmorillonite (PLA/OMMT) and poly(lactic acid)/ nano-precipitated calcium carbonate (PLA/NPCC) were exposed to a water absorption test at 30°C for 70 days. The analysis was focused on the water diffusion kinetics and impact strength changes induced by the hydrolysis. The dif…
Electron microscopy is currently the most powerful method to discern the mechanisms of solid-state transformation and dissolution-reprecipitation for the studies of biomineralization. In this work, we show that solid-state NMR spectroscopy can serve as a useful complementary technique to characterize the crystallizati…
Abstract Mechanical treatment of polymers produces surface cations and anions which, as demonstrated here for the first time, can drive chemical reactions. In particular, it is shown that such a mechanical treatment transforms nonconductive polyaniline into its conductive form. These results provide a mechanical means…
Abstract 1,2-Dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) bilayer with stilbene was investigated by using phase-contrast and fluorescence microscopy, differential scanning calorimetry, and Fourier transform infrared and UV–visible absorption spectroscopy. The results indicate that the temperature of the gel–liquid-c…
Tumors are inherently resilient and often develop resistance against cancer therapies, leading to poor patient outcomes. With the sophisticated analytical and computational tools now available, much has been revealed about how molecularly targeted drugs affect the biochemical networks of cancer cells, enabling the dir…
A revision of taxa from the genus Staurosira and Staurosirella from the Maritime Antarctic Region, formerly identified as Staurosirella (Fragilaria) pinnata and Fragilaria alpestris, resulted in the description of three new taxa: Staurosira pottiezii Van de Vijver sp. nov., Staurosirella antarctica Van de Vijver & E.M…
A single crystal of isovalently substituted Ba(Fe$_{1-x}$Ru$_{x}$)$_2$As$_2$ ($x=0.24$) was sequentially irradiated with 2.5 MeV electrons up to a maximum dose of $2.1 \times 10^{19}$ electrons/cm^2. The electrical resistivity was measured \textit{in - situ} at $T=$22 K during the irradiation and \textit{ex - situ} as…
This paper presents a predictive and easily implementable hysteresis model for ferromagnetic laminations subjected to various quasi-static magnetic loads. In this model, the description of magnetic hysteresis is based on the decoupling of the magnetic field strength in a reversible and irreversible part, unlike in the…
A novel water-stable (t1/2 ∼ 6.8 days) mononuclear manganese(IV) complex of a hexacoordinating non-Schiff-base ligand (H4L) with N2O4-donor atoms has been synthesized and characterized crystallographically. High-frequency electron paramagnetic resonance experiments performed on a single crystal reveal a manganese(IV)…
Polyurethane-clay nanocomposites were prepared by in situ polymerization method. Different nanoclays were used. The morphology of nanocomposites was studied. Nanocomposites containing Cloisite 30B and Dellite® 43B showed the exfoliation morphology. This diversity in such behaviors originated from the difference in typ…
This paper provides a systematic study of structural and optical properties of cadmium sulfide (CdS) films annealed under hydrogen (H 2 ) in a wide range of temperatures (200–450 °C) and times (3–120 min). The aim is to present the properties of the CdS film as a function of hydrogen annealing conditions and to discus…
Using inelastic neutron scattering, we show that the onset of superconductivity in underdoped $\mathrm{Ba}({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x}{)}_{2}{\mathrm{As}}_{2}$ coincides with a crossover from well-defined spin waves to overdamped and diffusive spin excitations. This crossover occurs despite the p…