Materials Literature
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Nanoscale transistors employing an individual semiconducting carbon nanotube as the channel hold great potential for logic circuits with large integration densities that can be manufactured on glass or plastic substrates. Carbon nanotubes are usually produced as a mixture of semiconducting and metallic nanotubes. Sinc…
All sequential steps of transfer from relaxor to normal ferroelectric phase transition are found in Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 if concentration of PbTiO3 increases. The relaxor properties in Na1/2Bi1/2TiO3-SrTiO3-PbTiO3 solid solutions are described by the power law and Vogel-Fulcher relationship. Concentration depe…
Abstract Two nanosized zigzag‐shaped oligophenylene strands incorporating 2,2′‐biphenol units were prepared by Suzuki–Miyaura coupling methodology. The two strands are made up of ten and seven phenyl rings, respectively. Two synthetic pathways were evaluated. The first involved the preparation of the target oligopheny…
Spiral orbit tribometry friction tests performed on Ni-rich Ni 55 Ti 45 titanium ball bearings indicate that this alloy is a promising candidate for future aerospace bearing applications. Microstructural characterization of the bearing specimens was performed using transmission electron microscopy and energy dispersiv…
The Si(100)(2 × 1) surface serves as a template for the formation of Mn wires at room temperature, which are the starting point for the annealing experiments discussed here. The evolution of the Mn surface structures as a function of annealing temperature was observed with scanning tunneling microscopy for the tempera…
The mechanism of lamellar fragmentation in the semi-crystalline polymers with spherulitic structure, is observed at the beginning of plastic flow. It causes significant damage. This elementary mechanism is considered here as a result of plastic deformation coupled with damage, in the framework of generalized standard…
CoFe2O4-BaTiO3 powders with core-shell structure were prepared using wet chemical method. The powders were then used to prepare composite thick film by electrophoretic deposition technique. X-ray diffraction indicated that the films consisted of both spinel CoFe2O4 and perovskite BaTiO3 phase. Microstructures of the f…
The behavior of alkyl guest radicals inside carbon nanotube hosts with different diameters is analyzed using density functional theory (DFT) calculations. Here the inner alkyl radicals are assumed to be formed by decomposition of their precursors, which had been incorporated into the tubes. DFT calculations show that…
Non-woven polyethylene terephthalate (PET) fibers produced via melt blowing and compounded into a 6 mm diameter 3D tubular scaffold were developed with artery matching mechanical properties. This work compares the effects of ethylene oxide (EtO) and low temperature plasma (LTP) sterilization on PET surface chemistry a…
Electrooxidation to form neutral films of a homoleptic nickel dithiolene [Ni(b-3ted)2] (1) from an air-stable TBA salt is described [b-3ted = bis(3-thienyl)-1,2-ethylenedithiolene; TBA = tetrabutylammonium]. Films grown by potentiostatic electrodeposition directly onto interdigitated electrode arrays show improved con…
We investigate the effects of interlayer interactions and lattice distortions on the noncollinear ground state and spin dynamics of a geometrically frustrated triangular-lattice antiferromagnet with implications for the multiferroic phase of doped ${\text{CuFeO}}_{2}$, where both lattice distortions and anisotropy int…
Near-infrared (near-ir) quantum dots (QDs) are well known for their excellent optical characteristics. They hold great potential for applications in non-invasive long term observation and tracing of cells in vivo. Here, near-ir QDs with an emission wavelength of 800 nm (QD800) were used to label squamous cell carcinom…
Cerium-modified bismuth layer structure CaBi2Nb2O9(CBNO) ceramics were prepared by using the conventional mixed oxide method. X-ray diffraction analysis revealed that the cerium modified CBNO ceramics have a pure two-layer bismuth layer structure. The piezoelectric activity of CBNO ceramics was found significantly imp…
The chemical and mechanical properties of spider major ampullate (MA) silks vary in response to different prey, mostly via differential expression of two genes - MaSp1 and MaSp2 - although the spinning process exerts additional influence over the mechanical properties of silk. The prey cues that initiate differential…
ZnS and Co2+: ZnS nanocrystals were prepared in aqueous solution by one-pot method using thioglycolic acid as stabilizer. The nanocrystals were characterized by X-ray diffraction (XRD), FT-IR spectra and UV-Vis absorption spectra. The results show that both ZnS and Co2+: ZnS nanocrystals possess zinc-blende strcture.…
The slake durability index (ASTM D4644-08) measures the response of rock fragments to submerged tumbling action. This test was modified to eliminate oven drying, extend test-increment duration, and increase the number of test increments to better reflect conditions in rock-bed stream channels. The results are expresse…
Two pure fluoride and three fluoride phosphate glasses with known properties and global structure have been doped with Er 3+ (4f 11 ) in a concentration range between 10 19 and 10 21 Er 3+ cm −3 . A typical fluorozirconate (ZBLAN) and a typical fluoroaluminate glass (FP00) were compared. The effect of P 2 O 5 addition…
Different ions modified (K0.5Na0.5)NbO3(KNN)-based lead free piezoelectric ceramics were prepared by conventional mixed oxide ceramic processing. The roles of different doping ions, at the A or B sites of perovskite structure of KNN, on the properties of KNN-based ceramics were analyzed. The XRD analysis and dielectri…
Abstract In this work, the surface of vulcanized rubbers was treated by a low‐pressure microwave plasma process to enhance the adhesion with a silicone adhesive. The plasma reactor was fed with nitrogen, oxygen or synthetic air. Scanning electron microscopy and atomic force microscopy observations associated with X‐ra…
Dielectric constants in Pb(Zn1/3Nb2/3)O3-PbTiO3 were measured under the zero-field heating after a preceding field cooling. It was confirmed that a sharp phase transition between ferroelectric phases in Pb(Zn1/3Nb2/3)O3 appears at 114°C, and the phase boundary connects to the morphotropic phase boundary in the Pb(Zn1/…