Materials Literature
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We prepare the gallium oxide (β-Ga 2 O 3 ) nanomaterials from gallium and oxygen by thermal evaporation in the argon atmosphere and research their oxygen sensing under UV illumination with different oxygen pressures. X-ray diffraction reveals that the synthesized product is monoclinic gallium oxide, it is further conf…
Nanocrystalline zirconia powders have been prepared by microwave-hydrothermal synthesis starting from aqueous solution of ZrOCl2·8H2O. Results of investigations on the aqueous suspension stability of the washed zirconia nanopowders by dynamic light scattering showed that the suspension, constituted by superaggregates…
We studied the anchoring of 6CB on a series of self-assembled monolayers (SAMs) with a functional group that mimics that of the nematic liquid crystal (LC). The SAMs were first characterized by wetting, Fourier-transform infrared spectroscopy, and surface potential measurements. We found that, in two of these SAMs, th…
We report for the first time the deposition of fluorocarbon thin films on outer and inner surfaces of millimetric sized diameter stainless steel mini-tubes by radiofrequency pulsed plasma polymerization for coronary stent applications. The deposition was performed under a glow discharge with a mixture of hexafluorethy…
ABSTRACT Wheat starch‐based films were formulated by dispersing 4 g starch in distilled water, and plasticized with Gly and PEG in different levels (Gly = 2 and 3 mL/100 mL and PEG = 0.0, 0.2, 0.3 and 0.4 mL/100 mL). The emulsion films were evaluated for mechanical properties, water vapor transmission rate (WVTR). Pis…
The active rigidity joint is a composite mechanism using shape memory alloy and shape memory polymer to create a passively rigid joint with thermally activated deflection. A new model for the active rigidity joint relaxes constraints of earlier methods and allows for more accurate deflection predictions compared to fi…
The effect of rigid polymer content, tetrafluoroethylene (TFE), within elastomer polymer on the coalescence behavior of suspended rubbery particles during fast, diffusion-limited cluster−cluster aggregation (DLCA) has been studied in this work. This is achieved by first measuring in situ the time evolution of the aver…
Abstract A nickel and yttrium‐stabilized zirconia (Ni‐YSZ) composite is one of the most commonly used anode materials in solid oxide fuel cells (SOFCs). One of the drawbacks of the Ni‐YSZ anode is its susceptibility to deactivation due to the formation of carbonaceous species when hydrocarbons are used as fuel supplie…
Thin films of antimony-doped tin oxide (ATO) have been prepared by the sol-gel dip-coating (SGDC) process, using tin(II) chloride dehydrate (SnCl2, 2H2O) and antimony (III) chloride (SbCl3) as host and dopant precursors respectively. The effect of antimony doping on the structural, thermal, electrical and optical prop…
The recent patents on corrosion resistant coatings were reviewed in this paper. The materials of corrosion resistant components, e.g., metals and alloys, ceramics, polymers as well as composite materials, developed for environmental, economic and other concerns were discussed. In addition, the novel methods for formin…
Sensitive “hot spot”: Upon exposure to polar organic vapors like acetone and ammonia, a large peak shift is observed for the NC stretching band of 1,4-PDI that is situated in the gap between a gold electrode and gold nanoparticles (see figure). The peak shift is due to the large surface-to-volume ratio of Au nanoparti…
One-step colloidal synthesis of subnanometer CdS clusters in hydrophobic MFI-type zeolite crystals in the presence of 3-mercaptopropyl-trimethoxysilane (MPS), cadmium precursor, and tetrapropylammonium hydroxide (TPAOH) is performed. MPS is used as the bifunctional agent, as it hydrolyzes fast, cross-links with the si…
Several molecule-based magnets can be constructed from diruthenium tetracarboxylate building blocks. We study two such materials with antiferromagnetic interactions between Cr(III) ions and diruthenium paddle-wheel complexes. While collinear magnetic ordering in the three-dimensional compound is frustrated by the easy…
Lead‐based ferroelectric (FE) ceramics exhibit superior electromechanical properties; therefore, there has been an increased focus on developing new lead‐based FE materials with high Curie temperature ( T c ) and enhanced properties. The aim of this study was to investigate new compositions in the Pb(Mg 1/3 Nb 2/3 )O…
This paper starts with an introduction to the Onsager principle of minimum energy dissipation which governs the optimal paths of deviation and restoration to equilibrium. Then there is a review of the variational approach to moving contact line hydrodynamics. To demonstrate the validity of our continuum hydrodynamic m…
This work provides a generalization of Evans' homogeneous nonequilibrium method for estimating thermal conductivity to molecular systems that are described by general multibody potentials. A perturbed form of the usual Nose-Hoover equations of motion is formally constructed and is shown to satisfy the requirements of…
0.60Ba 0.6 Sr 0.4 TiO 3 (BST)–(0.40− x )Mg 2 SiO 4 (MS)– x Al 2 O 3 ( x =0, 0.5, 3, 5wt%) composite ceramics exhibit excellent characteristics suitable for tunable device applications. With increasing amount of Al, the dielectric peak can be quantitatively broadened and suppressed; the “phase transition temperature” T…
The morphology and defects in diamond grains comprising Brazilian carbonado have been investigated using X-ray diffraction, photo- and X-ray luminescence, electron paramagnetic resonance and Raman spectroscopy. Paramagnetic and non-paramagnetic defects in the diamond structure indicate that many of the studied carbona…
Abstract A novel trinuclear nickel(II) complex with N , N , N′ , N ″, N ″‐pentamethyldiethylenetriamine (pmdien) and a trithiocyanurate(3–) (ttc 3– ) bridge of composition [Ni 3 (pmdien) 3 (μ‐ttc)](ClO 4 ) 3 ( 1 ) was prepared. The X‐ray crystal structure of 1 was determined, revealing the tris‐N,S chelating mode of t…
This article presents ultrasound assisted carbonization method for the synthesis of calcium carbonate nanoparticles (nano calcite). The effect of different surfactants, such as polyacrylic acid, steric acid, sodium tripolyphosphate and myristic acid, on the synthesis of nano CaCO3 was investigated. Concentration of su…