Materials Literature
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This work focuses on the reactivity of carbon nanodiscs and nanocones with respect to pure fluorine gas. The starting materials, as-synthesized without post-treatment, consist of a mixture of nanodiscs (approximately 70% w/w), nanocones (approximately 20% w/w) and amorphous carbons (approximately 10% w/w). In order to…
Nanofluids of selective visible colors are developed in gold nanoparticles embedded in polymer molecules of polyvinyl pyrrolidone (PVP) in water. A simple HAuCl4 reaction with PVP molecules (a weak reductant) in aqueous solution at 60-70 degrees C yields the nanofluid in a single process step with an AU3+ --> Au calor…
We present a method for data storage in continuous ferroelectric (FE) media, applicable to storage systems based on one or more scanning probes. Written FE domains are read back in a destructive fashion by applying a constant voltage of magnitude greater than the coercive voltage, as is done in FE random access memory…
The combination of electrospinning and electrospraying techniques for the deposition of inorganic nanoparticles over polymeric nanofibers to create novel multifunctional nanomaterials has been carried out. The combination of these two techniques is essential because by conventional mixing of nanoparticles with polymer…
Abstract The complex permittivity and permeability of various periodic metamaterial (MTM) cells are extracted by using a fictitious rectangular waveguide consisting of perfect electric conductor and perfect magnetic conductor walls. The shapes of the MTM cells include a thin wire (TW), a single split‐ring resonator (S…
Microwave plasma enhanced chemical vapour deposition (MPECVD) was used for the production of carbon nanotubes. Vertically aligned multi-walled carbon nanotubes (MWCNTs) were grown on silicon substrates coated with cobalt thin films of thickness ranging from 0.5 nm to 3 nm. Prior to the nanotube growth the catalyst wer…
A two-dimensional numerical simulation of flow in patterned microchannel with alternate layers of different sizes of hydrophilic and hydrophobic surfaces at the bottom wall is conducted here. The effect of specified contact angle and working fluid (de-ionized (DI) water and ethanol) on capillary phenomena is observed…
The adsorption properties of CO molecules adsorbed on free and MgO supported Au clusters have been investigated by means of a first principles density functional theory (DFT) approach. We have focused our attention on the vibrational properties of CO adsorbed on gas-phase Au 3−7, Au 12, and Au 22 cluster anions, and o…
The effect of very small crystal sizes on the average coordination number (ACN) was evaluated by computer calculations. For well ordered materials, the experimentally measured ACN is often very near the theoretical maximum, i.e. the infinite lattice limit. However, even in perfectly ordered crystals the coordination n…
In order to obtain nano-structured as-disproportionated microstructure in partially Co-substituted NdFeB-type alloys, the Nd14Fe66.9GCo11B7Zr0.1Ga1.0 alloy was disproportionated by room-temperature reactive ball milling in hydrogen, with the mechanical energy serving as the driving force. The reaction progress during…
Abstract BACKGROUND: Results of a feasibility study to produce elongated structures of an electro‐conductive polyaniline complex (PANICOM) within polymer composites by means of an in situ deformation process are reported. The aim was to find an alternative route to produce fiber‐like polymer materials with potential a…
HATODAS II is the second version of HATODAS (the Heavy-Atom Database System), which suggests potential heavy-atom reagents for the derivatization of protein crystals. The present expanded database contains 3103 heavy-atom binding sites, which is four times more than the previous version. HATODAS II has three new crite…
A series of Au/TiO 2 catalysts were prepared by either photodeposition or deposition−precipitation methods. The catalysts were characterized by inductively coupled plasma-mass spectrometry (ICP-MS), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The catalyt…
Two new salts, [2-NaMePy]2[Ni(i-mnt)2] (1) and [2-NaMe-4-MePy]2[Ni(i-mnt)2] (2) ([2-NaMePy]+ = 1-(2′-naphthylmethyl)pyridinium, [2-NaMe-4-MePy]+ = 1-(2′-naphthylmethyl)-4-methylpyridinium and i-mnt2− = iso-maleonitriledithiolate), have been prepared and characterized by elemental analyses, UV, IR, molar conductivity,…
We studied the effects of post-annealing in H2 and O2 ambients on field-emission properties of vertically-aligned ZnO nanowire arrays synthesized by carbothermal reduction process. The turn-on electric field was dramatically decreased from 3.78 to 2.37 V/microm after post-annealing in H2 ambient, which was explained b…
During the last decade, an intensive investigative effort around the globe has been devoted to the understanding of scale effects on materials properties. In spite of their importance, nanoscale effects on tribological properties have attracted little attention. Such effects are of utmost importance to small scale dev…
We model an infinitely long liquid bridge confined between two plates chemically patterned by stripes of the same width and different contact angle, where the three-phase contact line runs, on average, perpendicular to the stripes. This allows us to study the corrugation of a contact line in the absence of pinning. We…
The crystal structure of Na(2)Mg(2)NiH(6) as published by Kadir and Noreus (Inorg. Chem. 2007, 46, 2220-2223) is revised. While the reported space group symmetry and cell parameters are correct, the Mg and hydride positions need to be interchanged. Consequently, the tetrahedral [NiH(4)](4-) complexes are stabilized by…
Sulfate attack and the accompanying crystallization of fibrous ettringite [Ca 6 Al 2 (OH) 12 (SO 4 ) 3 ·26H 2 O] cause cracking and loss of strength in concrete structures. Hard synchrotron X-ray microdiffraction is used to quantify the orientation distribution of ettringite crystals. Diffraction images are analyzed u…
Aligned titanium dioxide nanotubes may be grown on the surface of titanium metal by electrochemical oxidation in the presence of fluoride ion. There are a number of salient parameters that have been reported to affect the nanotube growth i.e., the nature, pH and concentration of the fluoride electrolyte, the cell pote…