Materials Literature
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We present the design and implementation of a beam-shifting slab (a transformation electromagnetics device) using tensor transmission-line metamaterials. A beam-shifting slab is an anisotropic, homogeneous and reflectionless slab which laterally displaces the electromagnetic field transmitted through it. The experimen…
Two hemicellulose fractions were obtained by extraction of one-month- old young bamboo (Phyllostachys pubescens Mazel). The fractionation procedure employed 2% NaOH as extractant, followed by filtration, acidification, precipitation, and washing with 70% ethanol solution. The total yield was 26.2%, based on the pentos…
We examine the effect of a single, nonmagnetic impurity in a multiband, extended $s$-wave superconductor allowing for anisotropy of the gaps on the Fermi surfaces. We derive analytic expressions for the Green's functions in the continuum and analyze the conditions for the existence of sharp impurity-induced resonant s…
Abstract The Ni0.4Cu0.2Zn0.4ferrites with different concentrations of Cr3+were synthesized at a low temperature (450°C) using sol–gel auto-combustion method. The X-ray diffraction analysis of the samples confirms the formation of a single-phase cubic spinel structure. The lattice constant decreases from 8.331 to 8.253…
Helium gas permeability and water absorption behavior of the recycled polypropylene/short bamboo fiber composite membrane were investigated. The effects of short bamboo fiber content and fiber chemical treatment on gas permeability and water absorption properties of composites have been examined. Our research showed t…
Phase behavior of a supramolecular system based on poly(4-vinylpyridine) (P4VP) and 3,4,5-tris(dodecyloxy)benzoic acid (TDBA) [P4VP(TDBA) x, where x is the molar ratio of TDBA to P4VP repeating unit] was investigated by means of FTIR, differential scanning calorimetry, polarized optical microscopy, and X-ray scatterin…
The present study describes the first example of hybrid particles composed of amorphous silica and corrole. The hybrid particles were obtained by covalent linking of the gallium(III)(pyridine) complex of 5,10,15-tris(pentafluorophenyl)corrole (GaPFC) at the surface of functionalized silica spheres. The functionalizati…
This work focuses on characterization of chiral organic systems with partial solid solutions. Particularly, behavior of the ( R )- and ( S )-ethanolammonium 3-chloromandelates (E3ClMA) has been investigated experimentally. Partial solid solutions of the series ( R )-E3ClMA–(Rac)-E3ClMA and ( S )-E3ClMA–(Rac)-E3ClMA we…
We investigate the phase stability of Na${}_{1/2}$Bi${}_{1/2}$TiO${}_{3}$, a prototype lead-free relaxor material, under pressure. By means of total energy calculations within density functional theory, we study the pressure stability of several structures with polar and antipolar distortions, in-phase and out-of-phas…
Magnetic nanoparticles offer potential advances in cancer treatment. One example is cancer theranostics, which refers to the combination of a diagnostic tool, i.e., magnetic resonance (MR) imaging, and therapeutic entities such as drugs, oligonucleotides, antibodies, and peptides. They can be conjugated with bioactive…
The synthesis and characterization of 5-(chromen-4-one)-dipyrromethane (1), 5-(6-methyl-chromen-4-one)-dipyrromethane (2), 5-(6-isopropyl-chromen-4-one)-dipyrromethane (3) and the respective chromans, 7-[2-pyrrolo]-pyrrole[1,2-a]12H pyrrolino[2,3-b]chroman-4-one (4), 4-methyl-7-[2-pyrrolo]-pyrrole[1,2-a]12H pyrrolino[…
Quantum dots (QDs) have not been used to label cytoskeleton structure of live cells owing to limitations in delivery strategies, and QDs conjugation methods and issues with nonspecific binding. We conjugated tubulin to QDs and applied the emerging method of photothermal nanoblade to deliver QD-tubulin conjugates into…
We have demonstrated that the iridium-catalyzed direct borylation of hexa-peri-hexabenzocoronene (HBC) enables regioselective introduction of boryl groups to the para-, ortho-, and meta-substituted HBCs in high yields. The boryl groups have been transformed into various functionalities such as hydroxy, cyano, ethynyl,…
AIM: To encapsulate the nucleoside gemcitabine (GEM) in novel PEGylated polymeric nanocapsules (NanoGEM). MATERIALS & METHODS: The biological activity of NanoGEM was tested both in vitro and in vivo in comparison with the free drug. The NanoGEM was made of polylactic acid and allowed the entrapment of a great amount o…
Diatoms developed a variety of mechanisms to form chain‐like colonies, resulting in diverse morphologies and bulk mechanical properties. These properties affect translation, rotation, and deformation of colonies in ambient flows as well as their susceptibility to breakage by flow‐ and grazer‐induced forces. Morphologi…
Abstract Magnetically separable catalysts were prepared and employed for the epoxidation of olefins with hydrogen peroxide. In all cases the magnetic core was firstly covered with a silica layer to prevent iron ion‐initiated decomposition of hydrogen peroxide. The catalytic active species, an ionic liquid‐type peroxot…
In this review paper the current state of research into the physical degradation of polymer films is elucidated. Modern applications of polymer films and the implication of their degradation are discussed. Recent investigations into solid interactions such as abrasion, adhesion, fatigue and other failure modes as well…
Silicon carbide nanotubes possess outstanding properties which enable them to have many applications. The buckling behaviour of silicon carbide nanotubes have been studied here. To do this, a 3D finite element method, known as space frame model has been proposed. Molecular mechanics are linked to density functional th…
Small, compact, and highly symmetric cube-octameric silsesquioxanes have recently attracted increased attention as scaffolds for tailor-made bioconjugates. The expanded arsenal of effective conjugation methods (CuAAC, TEC, oxime ligation) allows one to decorate these nanoparticles bearing up to eight addressable organ…
Linking monomeric perylenebisimide units to form dimers and trimers dramatically increased alignment in a nematic liquid crystalline host. Connecting units via flexible cross-linkers destroyed alignment: a rigid linker is necessary. Applying the fluorescent trimer dye in a switchable window greatly improved the contra…