Materials Literature
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Biological materials possess unique and desirable energy-absorbing mechanisms and structural characteristics worthy of consideration by engineers. For example, high levels of energy dissipation at low strain rates via triggering of crack delocalization combined with interfacial hardening by platelet interlocking are o…
Core modified porphyrinoids are porphyrin analogs which differ from these by containing at least one non-pyrrolic aromatic ring. The result of core modification is to produce systems with novel and unique physical and electronic properties. In this review, the various possible core modified porphyrins and their synthe…
Abstract Polyphenylene sulfide (PPS)/multiwalled carbon nanotube (MWCNT) composites were prepared using a melt‐blending procedure combining twin‐screw extrusion with centrifugal premixing. A homogeneous dispersion of MWCNTs throughout the matrix was revealed by scanning electron microscopy for the nanocomposites with…
Abstract The dielectric strength and energy storage capability of poly(vinylidene fluoride‐hexafluoropropylene) copolymer (P[VDF‐HFP]) films are enhanced by interleaving layers of PVDF copolymer with thin layers of polycarbonate (PC). To gain insight into the breakdown processes in such materials, focused ion beam (FI…
Supracrystals of 5-nm silver nanocrystals are characterized by various structures, ranging from face-centered-cubic (fcc), to hexagonal-close-packed (hcp), to body-centered-cubic (bcc) structures. Here, it is shown that the transition from fcc to hcp is solvent-dependent and attributed to specific stacking processes,…
A specific structure of doped graphene with substituted silicon impurity is introduced and ab initio density-functional approach is applied for the energy band structure calculation of the proposed structure. Using the band structure calculation for different silicon sites in the host graphene, the effect of silicon c…
Highly branched gold nanoflowers are synthesized in high yield by a simple amino-reducing method, without additional seeds or surfactant agents. We present a systematic investigation of the influence of different parameters on the size, morphology, and monodispersity of gold nanoflowers. The initial concentration of r…
The generation of interference patterns of evanescent electromagnetic waves with an essentially subwavelength period using dielectric waveguide diffraction gratings is considered. Using simulations within the framework of the electromagnetic theory, the possibility of obtaining high-quality interference patterns due t…
ZnO nanopowders have been synthesised using the spray pyrolysis method. XRD analysis reveals the powder samples to be of crystallite size 19 nm. SEM images indicate petal-like formation for the zinc oxide powder. The electrochemical properties have been studied using cyclic-voltammetric and chrono-potentiometric techn…
Novel neutral phosphine-modified heteroscorpionate ligand (3,5-Me(2)Pz)(2)CHPPh(2) (1) and its derivatives oxophosphine (2) and iminophosphine (3) heteroscorpionates were synthesized for the first time. These neutral heteroscorpionate ligands displayed unique chemistry towards rare-earth metal tris(alkyl)s [Ln(CH(2)Si…
Chemical methods for preparation of fluorinated carbon nanotubes and their functional derivatives published over the last 10–15 years are considered in detail and critically analyzed. Fluorinated carbon nanotube derivatives represent a new family of nanoscale fluorocarbon materials promising new applications in nanoco…
Lightning bugs: The emergence of antibiotic-resistant pathogens necessitates rapid, simple, and high-throughput antimicrobial susceptibility assessment and new antibiotics screening. A new method exploiting fluorescence resonance energy transfer (see picture) meets these demands and should ease new antibiotics discove…
In this work, tensile tests and one-dimensional constitutive modeling are performed on a high recovery force polyurethane shape memory polymer that is being considered for biomedical applications. The tensile tests investigate the free recovery (zero load) response as well as the constrained displacement recovery (str…
Inhibition of tumor angiogenesis has become an attractive target of anticancer chemotherapy. However, drug resistance and cytotoxicity against non-tumor associated endothelial cells limit the long-term use and the therapeutic effectiveness of angiogenesis inhibitors, thus increasing the necessity for the development o…
Peptide mixtures spontaneously formed micrometer-sized fibers and ribbons from aqueous solution. Hydrolyzed gliadin produced short, slightly elliptical fibers while hydrolyzed wheat gluten, a mixture of gliadin and glutenin, formed round fibers of similar size. Mixing hydrolyzed gliadin with increasing molar amounts o…
One of the challenges in organic systems with semiconducting function is the achievement of molecular orientation over large scales. We report here on the use of self-assembly kinetics to control long-range orientation of a quarterthiophene derivative designed to combine intermolecular π-π stacking and hydrogen bondin…
Abstract The fabrication of scalable quantum devices in diamond relies on the ability to produce optical centres with a high spatial resolution. Ion implantation is the most powerful technique for placing impurity atoms in a diamond matrix. Even though shallow optical centres can be produced with a resolution below 20…
Abstract Controlling sandwich‐structure of poly(ethylene terephthalate) (PET) microcellular foams using coupling of CO 2 diffusion and CO 2 ‐induced crystallization is presented in this article. The intrinsic kinetics of CO 2 ‐induced crystallization of amorphous PET at 25°C and different CO 2 pressures were detected…
We report on the preparation and characterization of CeO(2) nanofibers (CeO(2)-NFs) and nanocubes (CeO(2)-NCs), as well as Sm- and Gd-doped CeO(2) nanocubes (Sm-CeO(2)-NCs and Gd-CeO(2)-NCs), synthesized by a simple hydrothermal process for CO catalytic oxidation. The samples were characterized by X-ray diffraction (X…
Controlled functionalization of carbon nanotubes (CNTs) through the use of cycloaddition reactions is described. By employing various cycloaddition reactions, a wide range of molecules could be coupled onto CNTs without disruption of the structural integrity as well as with a statistical distribution of functional gro…