Materials Literature
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AgInSbTe alloys are attractive storage materials for phase change recording utilizing both optical and electronic contrast. The demand to decrease the thickness of such storage layers increases the significance of the surrounding dielectric layers, which can have a profound impact on the crystallization process. Hence…
The possibility has been indicated that polymers with helical chirality, such as poly-γ-benzyl-L-glutamate (PBLG) and poly-L-lactic acid (PLLA), exhibit a large shear piezoelectric constant. To attempt the realization of a PBLG membrane with a large piezoelectric constant, we fabricated the PBLG membrane oriented by m…
Current timber waterfront structures require the use of treated lumber to reduce environmental damage. Wood–plastic composites (WPCs) have been proposed as an alternative to treated timber due to their potential for reduced water absorption and degradation without chemical treatment. Even though WPCs are primarily mad…
Environmental transmission electron microscopy has been used to probe the mechanisms that govern Mg(OH)2 dehydroxylation and rehydroxylation processes at the near-atomic level. Dehydroxylation and rehydroxylation rates for these in-situ observations were controlled by regulating the water vapour pressure over the samp…
The equilibrium rheological properties of a range of isotropic exfoliated and intercalated hyperbranched polymer (HBP)/montmorillonite (MMT) clay nanocomposites have been investigated using low strain oscillating shear measurements at temperatures above the glass transition temperature of the HBP. Predominantly exfoli…
Abstract Two novel host compounds, 2,7-bis(3-hydroxy-3,3-diphenylprop-1-ynyl)fluorene and 2,7-bis[3,3-(biphenyl-2,2′-diyl)-3-hydroxyprop-1-ynyl]fluorene have been synthesized. Many inclusion complexes of these host compounds with common volatile guests show solid-state fluorescence, which is ascribed to the existence…
Flextensional actuators composed of a piezoelectric PZN‐PZT layer and a conducting PZN‐PZT/Ag layer were fabricated. Because the newly developed PZN‐PZT was sinterable at low temperature (<900°C), silver particles could be co‐fired with the PZN‐PZT. Therefore, an electrically conducting PZN‐PZT/Ag layer was fabrica…
High strain rate compression tests were conducted with columnar ice grown in the laboratory. In addition to measuring stress and strain to failure at 2 strain rates, we examined the effects of end conditions on the failure process. Experiments were performed in a split Hopkinson pressure bar at 2 temperatures, −10 C a…
The effect of powder properties on the degree of crystal orientation of Bi 4 Ti 3 O 12 (BIT) ceramics fabricated by a high-magnetic-field method was investigated. As expected, the degree of orientation of BIT ceramics exhibited little dependence on the crystallinity of the powder, and depended on the particle size of…
Abstract Rigid polyurethane foams are generally “closed celled” with a gas entrapped in each cell. The properties of such foams are significantly affected by the cell size distribution and morphology of the cells. For example, in thermal insulation foams, small cells lead to lower thermal conductivity and in foams for…
Focused electron-beam-induced deposition from a copper precursor is shown to allow self-formation of periodic features when the beam is scanned at lateral speeds of the order of the vertical deposition rate. The period of the structures can be tuned by the scan speed. Simultaneous monitoring of the electron-beam-induc…
This work presents a review of pH measurement methods and applications in cancers. Magnetic resonance spectroscopic imaging and magnetic resonance imaging measurements indicate that pH gradients of up to 1.0 pH unit can exit within 1-cm distance. Although measurement of blood pH can indicate systemic problems, it cann…
Dislocation motion in icosahedral Al–Pd–Mn quasicrystals has been observed in situ in a transmission electron microscope between 700 and 750°C. Contrast analyses show that it takes place by pure climb in twofold, threefold and fivefold planes. Moving dislocations exhibit polygonal shapes with edges parallel to twofold…
Lead- and bismuth-free Ba(Ti 1- x Zr x )O 3 (BTZ) thin films were fabricated on Pt(111)/Ti/SiO 2 /Si(100) substrates by the chemical solution deposition (CSD) process. The BaTiO 3 and BTZ005 thin films fabricated by the conventional process were observed to have a remarkable difference in grain size along the depth of…
Superlattice-structured Bi 4 Ti 3 O 12 -BaBi 4 Ti 4 O 15 (BiT-BBTi) ceramics and single crystals were prepared, and their crystal structure and polarization properties were compared with those of constituent BiT and BBTi. The Curie temperature ( T C ) of the BiT-BBTi crystals was 540°C, which was 40°C higher than that…
Metallic epitaxial LaTiO 3 /SrTiO 3 superlattice films were fabricated on SrTiO 3 (100) substrates. The superlattice structure maintained compressive epitaxial strain on LaTiO 3 and stabilized the perovskite LaTiO 3 crystal phase, which is not thermodynamically stable in thick films on SrTiO 3 . The superlattice films…
The ac performance of carbon nanotube field-effect transistors (CNFETs) has been characterized using two approaches involving: 1) time- and 2) frequency-domain measurements. A high input impedance measurement system was used to demonstrate time-domain switching of CNFETs at frequencies up to 100 kHz. The low level of…
Hydrothermal ZnO(0001) substrates with high crystalline quality were employed in the fabrication of polarity-controlled ZnO films using laser molecular beam epitaxy. The repolished Zn- and O-polar surfaces of ZnO substrates displayed atomically flat surfaces and high crystalline quality even after annealing at high te…
A Sn-nanorod-templated process was used for the first synthesis of single-crystalline wurtzite-type ZnS nanotubes. The as-grown ZnS nanotubes are structurally uniform single crystals and are partially filled with Sn (see picture). Most of the tubes are straight with lengths ranging from several to tens of micrometers,…
Abstract The aim of the study was to find and investigate some blends of polysaccharides, that could be used as binders and plasticizers in the basic conditions of aqueous alumina suspensions. Aqueous suspensions containing 45% (v/v) α‐alumina and maltodextrin combined with small quantities of other polysaccharides (t…