Materials Literature
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Focused electron beam induced depositions of nickel-containing materials obtained by using bis(methylcyclopentadienyl)nickel(II) Ni(C5H4CH3)2 and tetrakis(trifluorophosphine)nickel(0) Ni(PF3)4 as precursors, were compared in terms of chemical composition and electrical resistivity. Ni(PF3)4 decomposed into higher Ni c…
Chain-like NiS tubes and echinus-like nickel sulfide (Ni 3 S 2 ) nanostructures were synthesized successfully by a solution chemical route. The growth models of these two materials and the most possible mutation process between these two different morphologies are discussed. The temperature and field dependent magneti…
This article presents an extrusion-based, open-cell foaming process using thermoplastic polymers such as polystyrene (PS) and polycarbonate (PC) with supercritical CO 2 . Our previous studies have indicated that a cell opening can be promoted by inducing: (i) a nonhomogeneous melt structure by cross-linking, polymer b…
The effect of the Ag 2 Te phase on the electrical conductivity, thermoelectric power, and Hall coefficient of the AgSbTe 2 alloy in the Ag-Sb-Te system has been studied at temperatures from 300 to 480 K. The results indicate that the phase transition of AgSbTe 2 is broadened by ∼70% and is due to the α → β phase trans…
Femtosecond electron crystallography reveals the atomic structural changes that underpin a light-induced insulator-metal transition.
The synthesis, transition temperatures and structure–property relationships of a variety of thiophene‐containing azobenzene esters derived from either 3‐(2‐thienyl)acrylic acid (series I, IV, VI, VIII, X and XII) or 3‐(3‐thienyl)acrylic acid (series II, V, VII, IX, XI and XIII) and appropriate fluoro‐ and non‐fluoro‐s…
The growth of plasma-enhanced atomic layer deposition (PEALD) grown copper films appropriate for nanoscale electronics applications is reported. Self-limiting PEALD copper growth behavior, employing copper(II) acetylacetonate and atomic hydrogen as reactants, was observed. Deposition of continuous layers as thin as 10…
Cyclic voltammetry (CV) was used to assess fabrication of a nanoporous film from a polystyrene-poly(methyl methacrylate) diblock copolymer (PS-b-PMMA) and also to explore the surface functional groups on the resulting nanopores. Polymer films containing vertically aligned cylindrical nanoscale pores (ca. 10 nm in pore…
Triethoxysilyl‐grafted ethylene propylene diene monomer rubber (EPDM) was prepared with the silane coupling agent, bis‐[‐3‐(triethoxysilyl)‐propyl]‐tetrasulfide (TESPT), and thus modified rubber has been treated by an in situ sol‐gel method with the objective to grow silica particles inside the rubber matrix. TESPT gr…
Low-pressure discharge lamps obey a set of physical laws that are different from those of high-pressure discharge lamps. In this paper, these differences are addressed. Based on a recently developed HID lamp model frame, a semi-theoretical fluorescent lamp model that can be determined by genetic algorithms and simple…
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…