Materials Literature
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Due to the unique physicochemical properties of nanomaterials (NM) and their unknown reactivity, the possibility of NM altering the optical properties of fluorometric/colorimetric probes that are used to measure their cyto- and genotoxicity may lead to inaccurate readings. This could have potential implications given…
A self-assembly process has been designed for the controlled synthesis of β-NaGdF(4) with uniform morphology, dimension, and considerable monodispersity under a gentle hydrothermal condition using sodium citrate as the chelating agent. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron…
In this paper we report semiconductor to metal transition and polaron conduction in nanostructured cobalt ferrite. The material was prepared by the coprecipitation technique. Average particle size was determined to be ∼10 nm by x-ray diffraction and transmission electron microscope analysis. A detailed electrical char…
Solvent quality affects the interactions between neutral polymer brushes and colloids as manifested in the concentration profiles of the colloidal particles, c prt ( z ), and the corresponding adsorption isotherms. Lowering the solvent quality, and eventual brush collapse, reduce the osmotic pressure at height z withi…
Abstract Polypyrrole (PPy) and Polypyrrole‐ZnO (PPy‐ZnO) nanocomposites were electrodeposited on mild steel and its corrosion protection ability was studied by Tafel and Impedance techniques in 3.5% NaCl solution. Pure Polypyrrole film was not found to protect the mild steel perfectly but the coating with nano‐sized Z…
Highly defective MgO nanosheets were prepared by a colloidal synthesis and exhibited low-temperature ferromagnetism which was significantly larger that the magnetization potentially obtainable from the low transition-metal impurity concentration. Electron paramagnetic resonance experiments confirmed that the magnetiza…
Partially aligned polyacrylonitrile (PAN)-based nanofibers were electrospun from PAN and PAN/single-walled carbon nanotubes (SWNTs) in a solution of dimethylformamide (DMF) to make the nanofiber composites. The as-spun nanofibers were then hot-stretched in the oven to enhance its orientation and crystallinity. With th…
Fine-grained Pb-free (Na(0.535)K(0.485))(0.95)Li(0.05)(Nb(0.8)Ta(0.2))O(3) (NKLNT) piezoceramics prepared by spark plasma sintering (SPS) technique was used to fabricate NKLNT/epoxy 1-3 composites with a modified dice-fill method. Because of its good machinability, SPSed NKLNT ceramic rods could be miniaturized to a l…
Piezoelectric ceramics of the composition Na 0.5 K 0.5 NbO 3 (NKN) with grain sizes in the range of 0.2–1 μm were fabricated by spark plasma sintering. Ferroelectric domain size decreases with decreasing grain size and non‐180° ferroelectric domains walls were still visible in 200 nm sized grains. The Curie point of t…
Fullerenes framed: The combination of molecule–molecule interactions and molecule–silicon substrate interactions leads to the formation of a large-scale 2D open supramolecular framework with improved thermal stability up to 400 K on a semiconductor surface. The robust open honeycomb network controls the growth of and…
High Li${}^{+}$ conductivity in the high-temperature (hexagonal) phase of LiBH${}_{4}$ is revealed through a first-principles molecular dynamics simulation of 1200 atoms using periodic boundary conditions. The high ionic conductivity originates from the generation of a Li${}^{+}$ metastable state located at an interst…
The structure–property relationships of polypropylene/ethylene-propylene-diene (PP/EPDM) (80/20) nanocomposites containing single-walled carbon nanotubes (SWCNTs) by melt-mixing process were investigated, the main focus being on the effect of SWCNTs concentration and compatilizer content. Morphological observations by…
We present a technique to increase carbon nanotube (CNT) density beyond the as-grown CNT density. We perform multiple transfers, whereby we transfer CNTs from several growth wafers onto the same target surface, thereby linearly increasing CNT density on the target substrate. This process, called transfer of nanotubes…
Kein Entkommen: Ein neuer Katalysator, in dem Goldnanopartikel von Titandioxidnanokugeln umhüllt sind, wurde entwickelt (siehe Bild). Die neue Nanoarchitektur verhindert das Sintern und den Aktivitätsverlust dieser Nanopartikel, während sie den Reaktanten freien Zugang zur Metalloberfläche lässt. Das Ergebnis ist ein…
Sensors based on materials with a giant magnetoelectric (ME) effect may be used to measure biomagnetic fields at room temperature. It is necessary to know the noise behavior of the whole detection unit. The noise level of a thin-film ME sensor was measured at room temperature, and suitable types of low-noise amplifier…
The removal of sodium salts from saline soils by salt tolerant crops, as alternative for costly chemical amendments, has emerged as an efficient low cost technology. Lysimeter experiments were carried out on a highly saline sodic soil (ECe = 65.3 dS m(-1), ESP = 27.4, CEC = 47.9 cmole+ kg(-1), and pH = 7.7) and irriga…
In this paper, dynamic simulation of the equivalent circuit model of the supercapacitor, taking into account the parameter variations and self-discharge, is discussed. Self-discharge is modeled with equivalent impedance including a constant phase element (CPE), and the parameter variations depending on the voltage are…
Compositional and interfacial control in heterojunction thin films is critical to the performance of complex devices that separate or combine charges. For high performance, these applications require epitaxially matched interfaces, which are difficult to produce. Here, we present a new architecture for producing low-s…
Inventing the double wheel: A mixed–valent [Mn32] cluster with a very rare “double-decker” wheel topology (see its metal–oxygen core: MnIII blue, MnII pink, O red) is reported. It is by far the highest-nuclearity example of its type, and it displays SMM behavior with the largest effective barrier to magnetization rela…
Groß und klein zugleich: Der größte ligandenstabilisierte Magnesiumhydridcluster, bestehend aus 8 Mg2+- und 10 H−-Ionen, dient als Modell für das kleinste Wasserstoffspeichermaterial im Subnanometerbereich. Zwischen Hydrid-Ionen in diesem molekularen Cluster werden magnetische Kopplungen beobachtet (siehe Bild), und e…