Materials Literature
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We investigate the influence of two groups of ions on the complex dielectric constant of a nematic liquid crystal limited by perfectly blocking electrodes. The analysis is performed by solving the equations of continuity for the two groups of cations and anions, and the equation of Poisson relating the actual electric…
High-strength carbon fibers were oxidized by exposure to nitric acid and single-fiber wettability predictions were compared to the actual wettability of multiple fibers in resin. Single-fiber wettability was predicted through contact-angle measurements and surface-energy calculations. Multiple-fiber wettability in res…
The mechanical properties of amorphous carbon (a-C) films strongly depend on the film structure. This paper reports on the superhardness of an a-C film resulting from a sp2 dominant microstructure synthesized by magnetron sputtering. The inherent medium compressive stress ensures the film is deposited with a thickness…
Abstract Because of its high stiffness, chemical resistance, and low viscosity, Poly (oxymethylene) (POM) is of high relevance for technical applications. The thermal degradation of POM during processing affects its final properties and decreases the long‐term stability. The degradation is indicated by the emission of…
A high-resolution and high-throughput synchrotron powder diffractometer has been automated for use with samples that are mailed in by Advanced Photon Source users. Implementation of a relational database with web interfaces for both outside users and beamline staff, which is integrated into the facility-wide proposal…
We previously identified a matrix protein, MSI7, from pearl oyster Pinctada fucata. According to the structural analysis, the DGD site in the N-terminal of MSI7 is crucial for its role in the shell formation. In this study, we expressed a series of recombinant MSI7 proteins, including the wild-type and several mutants…
To evaluate the effect of fungal decay on the physico-mechanical properties of natural composites, a commercial extruded bagasse/polypropylene composite from a manufacturer was sampled. Weight loss, long-term water absorption, flexural modulus, flexural strength, and unnotched impact strength were determined after inc…
Abstract A copolymer of 4‐methoxybenzyl methacrylate and isobornyl methacrylate was synthesized by atom transfer radical polymerization. The structure of poly(4‐methoxybenzyl methacrylate‐ co ‐isobornyl methacrylate) was confirmed by means of Fourier transform infrared, 1 H‐NMR, and 13 C‐NMR techniques. The molecular…
Abstract The polymeric precursor polystyrene sulphonate beads were used to produce activated carbon spheres (ACSs). ACSs were prepared by carbonization of polymeric precursor at 800°C followed by activation of resultant char with steam and carbon dioxide activation processes. The resulting ACSs were characterized for…
The structural properties of static, jammed packings of monodisperse spheres in the vicinity of the jamming transition are investigated using large-scale computer simulations. At small wave number k , we argue that the anomalous behavior in the static structure factor, S(k) approximately k , is consequential of an exc…
Abstract: Pseudoelastic behaviour of three types of Ti–Ni shape memory alloys in a pseudoelastic state has been studied under conditions of maximum strain‐ and maximum stress‐controlled cycling. Experimental results proved that residual deformation after unloading increases with the number of cycles; however, critical…
The distribution of strain field plays an important role in deciding the physical properties of nanocrystals. The growth strain of Ge/GeO 2 core/shell nanoparticles embedded in a regular array of Al 2 O 3 nanoparticles and its resulting effect on the optical properties are investigated. Two-dimensional finite element…
Polycrystalline films of betaine phosphite (BPI) and triglycine sulphate (TGS) were grown by the evaporation method on different substrates (α-SiO2, α-Al2O3 and LiNbO3 with interdigital transducers, and Al/SiO2). Large (∼1 mm in BPI and ∼0.2 mm in TGS) single-crystalline blocks were visualized in a polarizing microsco…
In several metal/oxide interfaces, it is well known that polar facet of the oxide influences the formation of a stable metal/oxide interface. However, the formation mechanism of such polar interface is still unclear. In this work, Pd/(0001)ZnO and $\text{Pd}/(000\overline{1})\text{ZnO}$ interfaces were used as model s…
The Eu3+-doped ZnS nanocrystals prepared by the chemical method have a cubic structure. All the transitions 5D0 ? 7FJ (J = 0, 1, 2, 3, 4, 5, 6) of Eu3+ were observed in ZnS nanocrystals. In particular, the forbidden transitions of 5D0 ? 7F0, 5D0 ? 7F3 and 5D0 ? 7F5 were all observed and their observed values of energi…
This paper reports on the switching characteristics of a spiropyran−cyclodextrin inclusion complex on a Au(111) surface. The switching behavior in acetone/water and ethanol/water solution is compared with that of the complex as thin film (∼100 layers) on gold and with the complex in a microcrystalline form. For the in…
Abstract NiCuZn ferrite nanopowders and polycrystalline bulk samples were prepared by wet chemical (citrate) method followed by sintering at temperatures lower than those for conventional solid‐state ceramic route. The citrate method results in nanopowders. The addition of copper promotes sintering, and results in gra…
A novel continuous flow (CF) electroless (EL) plating method deposits gold (Au) films which exhibit increased continuity and uniformity relative to batch immersion as measured by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Transmission UV−vis (T-UV) spectra exhibit lower peak heights (PH) and…
Abstract The tri‐nickel Dawson sandwich complex [NaNi 3 (H 2 O) 2 (P 2 W 15 O 56 ) 2 ] 17– has been obtained from [P 2 W 15 O 56 ] 12– and Ni 2+ . The X‐ray crystal structure analysis is reported. This complex presents an unprecedented structure with the three transition metal ions in two external and one internal pos…
A three‐dimensional quantitative Raman analysis of ferroelectric domain orientation is presented for single‐crystalline barium titanate (BaTiO 3 ; BT). The analysis has been developed according to basic principles of polarized/confocal Raman spectroscopy and is aimed at visualizing in three dimensions the geometrical…