Materials Literature
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Abstract Three Ultic Haplorthods with significant illuviation of clay and spodic materials in the subalpine forests located in the Alishan area of central Taiwan were selected to identify the clay mineral compositions by X-ray diffraction (XRD) and to explain the transformation of the clay minerals. The three pedons a…
The orientation dependence of slowness and electromechanical coupling coefficients of 0.92Pb(Zn1/3 Nb2/3)O3-0.08PbTiO3 (PZN-8%PT) domain engineered single crystal was analyzed based on the measured complete set of elastic, piezoelectric, and dielectric constants. There exist one quasi-longitudinal, one quasi-shear, an…
DDOA (2,3-bis( n -decyloxy)anthracene) has been successfully employed as a template to direct the growth of high-surface alumina-based fibers exhibiting bimodal porosity. Hybrid gels were obtained after thermal aging (at 40 °C) of an aqueous ethanol solution of AlCl 3 entrapped by a previously formed DDOA organogel. S…
The reactive sintering of 3Ti/SiC/C to form the layered ternary carbide Ti 3 SiC 2 was studied in situ by time‐resolved neutron powder diffraction. A number of intermediate processes occur during the synthesis beginning with the α‐β transition in Ti. Concurrent with the α‐β transition, two intermediate phases, TiC x a…
A pseudorotaxane monolayer consisting of a supramolecular complex generated between cyclo-bis(paraquat- p -phenylene), ( 1 ), and the 1,4-bis(mercapto ethyloxy ethyloxy ethyl)benzene monolayer, ( 2 ), that is stoppered by CdS nanoparticles (3−5 nm) is generated on Au electrodes. The surface coverage of the supramolecu…
We study segregation patterns in a hard-sphere binary model under gravity subject to sequences of taps. We discuss the appearance of the "Brazil nut" effect (where large particles move up) and the "reverse Brazil nut" effects in the stationary states reached by "tap" dynamics. In particular, we show that the stationar…
Abstract The colored isomer produced in 1,2-bis(2,5-dimethyl-3-thienyl)perfluorocyclopentene crystal upon irradiation with ultraviolet light showed an absorption maximum at 535 nm, which is 30 nm longer than that in hexane, 505 nm. The spectral shift is ascribed to the strained structure of the photogenerated closed-r…
To implement surface-enhanced Raman spectroscopy as a practical detection method, highly enhancing, stable, and reproducible substrates need to be fabricated in an efficient manner, and their performance in different solution environments should be well characterized. In this work structured porous gold films have bee…
Abstract PVC‐clay nanocomposites have been prepared by solution blending of the polymer with both sodium montmorillonite and an organically modified clay. The nanocomposites have been characterized by X‐ray diffraction and transmission electron microscopy; in all cases the materials are best described as mixed immisci…
In the present study, the room‐temperature properties of Al 2 O 3 ‐Ti 3 SiC 2 composites with different Ti 3 SiC 2 contents are determined. The composites are prepared by attrition milling Al 2 O 3 and Ti 3 SiC 2 mixture powders followed by spark plasma sintering (SPS) under vacuum. From a closer examination of the de…
A three-step strategy to synthesize well-defined amphiphilic poly[( R, S )-β-malic acid- b -ε-caprolactone] diblock copolymers (P(MLA- b -CL)), which combines the anionic polymerization of benzyl β-malolactonate (MLABz) with the coordination−insertion ring-opening polymerization (ROP) of ε-caprolactone (CL), followed…
The photoinduced charge separation between a photosensitizer, 5,10,15,20-tetrakis-( N -methyl- pyridinium-4-yl)21H,23Hporphyrin cation (TMPyP 4+ ), and an electron acceptor, methyl viologen (MV 2+ ), intercalated in the different layer sheets of titanoniobate (TiNbO 5 - ) and successively cast on a SiO 2 glass slide h…
A model was developed to investigate the corrosion of a coated pipeline surface in a thin, narrow channel crevice formed between the pipe surface and the coating. Such crevices are often found on natural gas pipelines when the coating is high-density polyethylene (HDPE). Imposed cathodic protection current passage thr…
Exposure of vascular cell-seeded, tubular, biodegradable polymers to pulsatile flow conditions has been proposed as a method to develop tissue-engineered blood vessels by "maturing" structural integrity, and increasing collagen content, suture retention, burst pressure, and tissue formation. These in vitro tissue-engi…
Abstract Anisotropic susceptibilities of feeble magnetic ceramics such as zinc oxide are quite small; therefore, it had been difficult to control the textured microstructures of these ceramics using a magnetic field. However, fabrication of the textured ZnO is achieved by slip casting in a strong magnetic field follow…
Article Redetermination of the crystal structure of mercury chlorothiocyanate, HgClSCN was published on December 1, 2002 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 217, issue JG).
Abstract Semi-crystalline polymers like syndiotactic polypropylene pass during tensile deformation different stages with cross-overs at four critical points. Temperature variation above ambient changes the stresses at the critical points, but leaves the strains constant. Cooling down to the glass transition leads to t…
The effects of γ-rays (20–160 Mrad) on the surface and catalytic properties of two Co 3 O 4 /MgO systems were investigated. The formulae of the investigated solids were 0.05Co 3 O 4 /MgO and 0.2Co 3 O 4 /MgO, respectively, both prepared by the impregnation method and calcined at 500°C. The irradiated samples were left…
Abstract Phase separation occurs in thin films of polymer blends when molecular mobility is promoted by a temperature above the glass transition but inside the twophase region (temperature quench), or a common solvent added to the polymers (solvent quench). This phenomenon can be altered by a homogeneous surface or pr…
The lens design problem for the 2002 IODC is to design a 100 mm focal length, f/8 all refractive system which simulates the chromatic behavior of a diffractive optical element. The lenses must be all spherical and be made of Schott glasses only. There is no restriction on the number of lenses, the design form, or the…