Materials Literature
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Layered double hydroxides (LDHs), anionic clays, have attracted increasing interest as nanovehicles for delivering genes, drugs, and bio-active molecules into cells. However, no attempts have been made to evaluate the potential undesirable effects of LDH nanoparticles. The cytotoxicity of LDHs with different chemical…
An ultra-low carbon austenitic stainless steel was successfully pressed from one to eight passes by equal channel angular pressing (ECAP) at room temperature. By using X-ray diffraction, optical microscopy and transmission electron microscopy, the microstructural evolution during ECAP was investigated to reveal the fo…
Serum albumin is the most abundant protein in blood plasma. Albumin has the ability to bind to a wide variety of compounds including drugs, and cells as well as proteins do not attach to an albumin-coated surface. These properties of albumin are attractive for biomaterials utilized in biomedical fields. In the present…
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Polystyrene has been widely studied as a matrix in nanocomposites, because it is a model amorphous polymer. The present article provides an extensive review of studies on polystyrene/layered silicate nanocomposites. Emphasis is given on different preparation methods, clay surfactants and polymer modifications used to…
Microwave irradiation is an important tool in the functionalization of fullerenes and carbon nanotubes. These are compounds with excellent properties that make them useful for the development of optoelectronic organic devices. The applications of microwaves in the chemistry of these materials are reviewed.
The potential of hemp fibre as a reinforcing material for Poly(lactic acid) (PLA) was investigated. Good interaction between hemp fibre and PLA resulted in increases of 100% for Young’s modulus and 30% for tensile strength of composites containing 30 wt% fibre. Different predictive ‘rule of mixtures’ models (e.g. Para…
Abstract Carbon Nanotubes are currently being synthesized by different methods. The methods differ largely by the achievable space‐time yield, amorphous carbon content and carbon purity. High space‐time yields can only be achieved by CVD processes. Though usually low contents of amorphous carbon are observed in CVD pr…
A mesoscopic rheological model is proposed for polymer/layered silicate nanocomposites. The conformation tensors c and a are chosen to characterize states of macromolecules and silicate layers (plates), respectively. In the absence of the plates, the model reduces to the well known FENE-P model. The predictions of the…
The structural and optical properties of WO3 nanorods prepared by oblique angle depositions were studied and compared with WO3 thin films. The x-ray diffraction analysis revealed that both the thin films and nanorods annealed at temperatures of 400 and 500°C had an orthorhombic structure, while only the thin films sho…
Modulation of the fibrillogenesis of amyloid peptide Abeta(1-40) with the cationic gemini surfactant hexamethylene-1,6-bis(dodecyldimethylammonium bromide) (C(12)C(6)C(12)Br(2)) has been studied. Both UV-vis and AFM results show that C(12)C(6)C(12)Br(2) monomers can promote the fibrillogenesis of Abeta(1-40) while its…
Abstract Summary: Blends of isotactic polypropylene (iPP) and high density polyethylene (HDPE) with and without ethylene‐propylene‐diene (EPDM) terpolymer as compatibilizer were systematically investigated to determine the influence of the EPDM on blends properties. The morphology was studied by Scanning Electron Micr…
We present a simple and mass-producible method of incorporating silver nanoparticles on the surface of electrospun silk non-woven membranes for the fabrication of antimicrobial wound dressings. Nanofibrous silk membranes with fiber diameters of 460 +/- 40 nm were electrospun from an aqueous Bombyx mori fibroin solutio…
Fibrous membranes of aligned poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) fibers have been made through electrospinning. A high-speed rotating drum was used as the fiber collector while the electric field was manipulated by using five knife-edged auxiliary electrodes. It was found that a high drum rotating speed of…
Abstract In the last decade, new titanium alloys have been developed in different areas of dentistry, such as Ti6Al7Nb, Ti6Al2Nb1Ta1Nb, and Ti5Al2.5Fe. The aim of this study was to compare the Ti6Al7Nb, Ti6Al2Nb1Ta1Nb, Ti5Al2.5Fe, and Ti6Al4V alloys with the commercial titanium, regarding the corrosion resistance in a…
The luminescence of lanthanide ions makes them interesting for a wide variety of applications and several researchers try to optimize this property. In this paper we give a brief overview of the luminescence process and of the techniques utilized to characterize the photophysical properties. Several recent examples of…
In this letter, we show a compact model that describes the main electrical features of phase change memory (PCM) devices. The model coherently reproduces the behavior of both SET and RESET states with the description of the physics of involved phenomena for different bias and temperature conditions. For arbitrary prog…
An electron–phonon interaction model is proposed and applied to thermal transport in semiconductors at micro/nanoscales. The high electron energy induced by the electric field in a transistor is transferred to the phonon system through electron–phonon interaction in the high field region of the transistor. Due to this…
Mo S 2 nanotubes have been synthesized by thermal decomposition of ammonium thiomolybdate (ATM) precursor and by using the aluminum oxide template method. Hollow tubes of very specific diameter and wall thickness were obtained presenting the so-called “bamboo” texture. These nanotubes are closed in sections; each one…
The effect of the degree of doping polycrystalline diamond films by boron on their Raman and absorption spectra has been studied in the visible region (from 200 to 1000 nm). As the boron concentration increases in a polycrystalline diamond film, its Raman spectrum exhibits a number of new specific features caused by t…