Materials Literature
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Single-walled carbon nanotubes (SWNTs) have been increasingly used in a variety of biomedical applications, such as in vivo delivery of drugs and tumor imaging. Potential exposure of SWNTs to human red blood cells (RBCs) may cause serious toxicity including alteration of mechanical properties of cells. The present stu…
Near-field blast load measurement presents an issue to many sensor types as they must endure very aggressive environments and be able to measure pressures up to many hundreds of megapascals. In this respect the simplicity of the Hopkinson pressure bar has a major advantage in that while the measurement end of the Hopk…
We report our recent results of fabrication and characterization of molecular electronic devices using benzene-based self-assembled monolayers (SAMs) and multilayer graphene (MLG) electrodes as the top electrode. In particular, we compared the electrical characteristics of two different benzenethiol molecules; 4-methy…
Abstract Fundamental processes of exciton scattering at organic solar-cell interfaces were studied using a one-dimensional tight-binding model and by performing a time-evolution simulation of electron–hole pair wave packets. We found the fundamental features of exciton scattering: the scattering promotes not only the…
Engineered nanomaterials, where at least one dimension is within 1-100 nm, are produced and used in many consumer products, with the purpose of enhancing specific material properties (e. g., in plastic products). Conventionally, organic and inorganic non-engineered nanomaterial additives are also used to enhance mater…
A study of the effects of ageing history on the electrical properties of lead-free ferroelectric ceramics of (K0.5Na0.5)(Nb1−xSbx)O3 + 0.5 mol% MnO2 and (K0.5Na0.5)(Nb1−xTax)O3 + 0.5 mol%MnO2 for x = 0.05 is reported. The samples after storage at a constant temperature have been subject to infra-low-frequency electric…
Carbon Nanotubes (CNTs) have many important applications, such as in biomedical technology and nanofluidics. However, dynamic behaviors of atom collision and pattern formation inside CNTs are not fully understood. In this research, we use molecular dynamics (MD) simulations to study argon cluster behaviors after colli…
ABSTRACT Presented here are computed rates for the thermal unimolecular decomposition of a variety of alkoxy radicals with four‐ and five‐carbon length backbones. Three classes of molecules are examined: alkoxy radicals with saturated hydrocarbon backbones, those with alcohol functional groups, and those with carbonyl…
The expression of the free energy of a liquid in terms of an explicit decomposition of the particle configurations into local coordination clusters is examined. We argue that the major contribution to the entropy associated with structural fluctuations arises from the local athermal constraints imposed by the overlap…
Aim of the work:the aim of this study is to find out the changes in the percentage of the bone surface area in the regenerating interradicular bone which take place in association with using occlusive or modified perforated collagen membranes in management of grade II furcation defects in dogs. Materials and Methods:…
Wydawnictwo SIGMA-NOT wydaje czasopisma fachowe informujące swoich czytelników o najnowszych osiągnięciach naukowych i nowoczesnych rozwiązaniach technicznych w Polsce i na świecie, popularyzuje problemy techniczne oraz poszerza wiedzę i kulturę techniczną.
We fabricated a non-local spin valve with a thin layer of graphite with Co transparent electrodes. The spin-valve effect and spin precession were observed at room temperature. The magnitude of the mangetoresistance increases when temperature decreases. The spin-relaxation time, [Formula: see text], obtained from the f…
ABSTRACT In this report, the BF3·Et2O catalyzed Friedel–Crafts polymerization of cyclopentadithiophene monomers for branched conjugation‐interrupted polymer electrets with the potential application in OFET memories were demonstrated. Branched polycyclopentadithiophenes with controlled molecular weights (Mn) of approxi…
The coexistence of magnetic and nonmagnetic phases in the superconducting potassium iron selenide, ${\mathrm{K}}_{x}{\mathrm{Fe}}_{2\ensuremath{-}y}{\mathrm{Se}}_{2}$, has been intensely debated. With superconductivity proposed to appear in a stoichiometric, nonmagnetic phase with I4/mmm crystal symmetry, the proposed…
Magnetic hyperthermia using ferrite nanoparticles has emerged as a eutherapeutic approach for cancer treatment. In this study, we had constructed folate conjugated poly(ethyleneimine) (PEI) modified magnetic nanoparticles (FA-PEI-MNPs) that generate heat in an alternating magnetic field (AMF). Transmission electron mi…
In this paper, effects of geometry and spatial placement of quadrangle silicon nanowires (NWs) on the performance of laterally assembled NW solar cells are investigated. Two different approaches are proposed to reach the broadband absorption enhancement in these types of solar cells. In the first method, a semi-period…
A complete account on the optimized critical parameters in the synthesis condition of crystalline carbon nanotubes (CNTs) based on chemical vapor disposition (CVD) is presented. The degree of crystallinity in the synthesized carbon nanotubes was studied to investigate the correlation of the effective parameters involv…
In general, crystal growth proceeds by the addition of growth units at steps originating from dislocations or 2D nuclei. However, evidence exists that small 3D nuclei deposited on crystal faces can also act as step sources. In this study, the Monte Carlo method, based on the Kossel model, is used to study the fates of…
The generic structure of most high Tc superconductors is a stacking sequence of superconducting planes separated by so‐called charge reservoir layers. It is well known that carrier doping of these materials is achieved either by substitution of atoms or by nonstoichiometry in the charge reservoir layer. The alternatin…
Clays, due to their specific surface area and electrical charge density, are among the most active minerals in aquifers, oil and gas reservoirs, and tailings ponds. Important problems, such as limited yield of oil recovery during petroleum exploration, involve the interaction of process fluids with minerals which cons…