Materials Literature
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Single-phase zinc sulphide (ZnS) quantum dots were synthesized by a chemical method. The influence of the pH value of the Zn(CH3COO)2 solution on the size and photoluminescence properties of the ZnS quantum dots was evaluated. X-ray power diffraction, transmission electron microscopy, and ultraviolet-visible spectrosc…
Microwave magnetic properties are studied for rhombohedral structure Nd 2 Fe 17 N 3-δ with planar magnetic anisotropy Its resin composites show the permeability μ' 0 = 4.15 at low frequency, the natural resonance frequency f r = 1.71 GHz and the resonance bandwidth 6.66 GHz. The calculated static permeability of Nd 2…
The injection molding of microcellular polymers is expected to be increasable promise for engineering applications. The combined effect of precision mold opening and gas counterpressure process produced uniform microfoam structure with a maximal cell diameter less than 10 μm/1/. The nature of microcellular PP and PC/A…
We briefly summarize a perspective on high-temperature oxide superconductors (HTC) as systems of intrinsic, functional, and connected spatial scales, with an associated set of temporal scales. We emphasize the importance of local bonding constraints, leading to a framework of coexisting short- and long-range fields, a…
CdSe and Mn-doped CdSe nanocrystals were synthesized by the inverse micelle technique using paraffin oil and oleic acid, and they were found to be highly crystalline with the zinc blende structure. The coarsening behavior of the nanocrystals was monitored using the red-shift in UV–visible light absorption peaks, and t…
Abstract Tapioca starch, poly(lactic acid) and Cloisite 30B nanocomposites foams, with clay contents of 1, 3, 5 and 7% (w/w), were prepared by a melt‐intercalation method. Multiple inputs single output models were developed to predict radial expansion ratio, unit density, bulk compressibility and spring index of the n…
ABSTRACT An improved means of isolating zein is needed to develop new uses for corn zein. We have measured the yield of zein and evaluated the ability of acetic acid to remove zein from corn gluten meal, distillers dried grains, and ground corn using acetic acid as solvent. Acetic acid removed zein more quickly, at lo…
Poly(vinylidene fluoride) (PVDF) experimental samples containing sparsely distributed chain branching were compared to commercial reference samples. The results showed a lower onset of shear thinning for the branched samples over the reference counterparts. The storage modulus of the branched samples at low frequency…
Hybrids of carbon single-walled nanotubes (SWNT) with fragmented single or double-stranded DNA (fss- or fds-DNA) or polyC were studied by Atom Force Microscopy (AFM) and computer modeling. It was found that fragments of the polymer wrap in several layers around the nanotube, forming a strand-like spindle. In contrast…
Chitosan is an excellent material for medical use because it is nontoxic, has good biocompatibility, exhibits antimicrobial activity, supports the healing of wounds, etc. Electrospinning yields nanofibers which have wide applications, such as high-performance filters, biomaterial scaffolds for vascular grafts or wound…
Abstract Over the past several decades, kaolin has been used intensively in the paper industry as a coating and filler material. These applications require kaolin of a high brightness grade, which depends heavily on the level of impurities (mainly Fe-bearing minerals such as Fe oxides and hydroxides) and may be improv…
CuO feather‐like and flower‐like crystals have been synthesized by a fast microwave‐assisted solution approach using Cu(NO3)2 and NaOH. The morphology transformation of CuO could be achieved by ionic liquid 1‐n‐butyl‐3‐methyl imidazolium tetrafluoroborate ([BMIM]BF4). With [BMIM]BF4, flower‐like CuO were obtained, whe…
In the present paper, the changes at interface between calcium carbonate (CaCO3) and polyurethane (PU) matrix in correlation to the mechanical and morphological properties were investigated. The effect of the untreated CaCO3 microfillers versus nanofillers and/or selected silane pretreatment of nanofiller surface were…
In previous research, we found that dimethyloldihydroxyethyleneurea (DMDHEU) is able to covalently bond hydroxy-functional organophosphorus oligomer (HFPO) to nylon and to cotton by formation of a cross-linked polymeric network. In this research, we applied HFPO to two nylon/cotton blend military fabrics using DMDHEU…
We report that a deep ultraviolet (DUV) laser from the sixth harmonic of a 1064 nm laser has been firstly used as light source in an ultrahigh energy-resolution angle-resolved photoemission spectroscopy (ARPES). The wavelength is 177.3nm obtained by using the second harmonic KBe 2 BO 3 F 2 crystal with a frequency tri…
Abstract Chitin is a polysaccharide found in the outer skeleton of insects, crabs, shrimps, and lobsters and in the internal structures of other invertebrates. Sulfated chitin was prepared by reacting carboxymethyl chitin (CM‐chitin) with 2‐aminoethane sulfonic acid by using 1‐ethyl‐3‐(3‐dimethylaminopropyl)carbodiimi…
Abstract The role of adsorption species in reaction solutions has been studied in microwave-polyol synthesis of silver (Ag) nanostructures. When Ag+ ions from AgNO3 were reduced in ethylene glycol by the addition of H2[PtCl6] and poly(vinylpyrrolidone) (PVP), a mixture of one-dimensional (1-D) nanorods and nanowires a…
Abstract We report on the fabrication of all transparent heterojunction thin film diodes of the form glass/n-ZnO: Al/p-CuAlO2 produced by a combinatorial chemical and physical technique and on a study of their electro-optical properties. The n-ZnO: Al layer was deposited by a sol-gel-dip-coating process whereas the p-…
Abstract Three zirconium alloys (Zry-4, Zry-2, and NDA) were corrosion tested at 633 K in pure water and in mixed gas of Ar and oxygen. In both environments, their corrosion rate showed cyclic changes. The time and the weight gain at the transition point changed with their corrosion resistance. In the pure water corro…
Aiming at preparation of shape memory alloys (SMAs), we explored the SHS of Cu1 − x Zn1 − y Al1 − z alloys (0.29 < x < 0.30, 0.74 < y < 0.75, and 0.83 < z < 0.96). The most pronounced shape memory effect was exhibited by the alloys of the following compositions (wt %): (1) Cu(70.6)Zn(25.4)Al(4.0), (2) Cu(70.1)Zn(25.9)…