Materials Literature
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We investigate the size-dependent optical absorption coefficients of CdSe nanocrystals at both the band-edge and high within the absorption profile. The absorption properties in both of these regions must be self-consistent to ensure accuracy of the measured coefficients. By combining transmission electron microscopy…
Abstract Polystyrene terminated with benzyl alcohol units was employed as a macroinitiator for ring‐opening polymerization of ε‐caprolactone and L ‐lactide to yield AB‐ and ABC‐type block copolymers. Even though there are many reports on the diblock copolymers of poly(styrene‐ block ‐lactide) and poly(styrene‐ block ‐…
In this paper, we report on the phosphosilicate glass membranes doped with a mixture of titanium oxide (TiO 2 ) and zirconium oxide (ZrO 2 ) for their applicability in low-temperature H 2 /O 2 fuel cell electrolytes. Measurements concerning x-ray diffraction, optical absorption/transmission, Fourier transform infrared…
Abstract Structural characterisation of a number of hydrated solids containing chiral, kinetically inert [Co(A–A) 3 ] 3+ cations (A–A = 2,2′‐bipyridine, 1,10‐phenanthroline, 4,4′‐dimethyl‐2,2′‐bipyridine) and chiral, kinetically labile [Ln(dipic) 3 ] 3– anions (Ln = La, Eu, Tb, Ho, Er, Lu, Y, though not for all cobalt…
Pb 0.5 Sr 0.5 TiO 3 (PST) films having a pure polycrystalline perovskite phase and well-grown grains were prepared by a chemical solution deposition method. Their optical response from 1.1 to 5.0 eV was investigated by transmittance spectroscopy, and the complex dielectric functions and optical parameters were evaluat…
A disordered network of bonds with a fixed configuration can relax via a variety of unconstrained motions. These motions can be directly inferred from the topological arrangement of constraints without any geometrical information. We use the pebble game algorithm of Jacobs and Thorpe [D. J. Jacobs and M. F. Thorpe, Ph…
A magnetic fault-current limiter is a passive device consisting of a permanent magnet and saturable magnetic cores. It offers low inductance to the circuit under a normal operating condition and places a high inductance under a faulted condition. The current suppression capability of a steel core is higher than that o…
We simulate the localized surface plasmon resonances of an Au nanoparticle within tunnelling proximity of an Au substrate. The results demonstrate that the calculated resonance energies can be identified with those experimentally detected for light emission from the tip–sample junction of a scanning tunnelling microsc…
Glyoxalase II enzymes catalyze the hydrolysis of a thioester substrate and have been found to coordinate a variety of dimetal combinations, including Fe(III)Zn(II), within the enzyme active site. Of relevance to these enzymes, the thioester hydrolysis reactivity of the Fe(III)Zn(II) compound [(BPBPMP)Fe(III)Zn(II)(mu-…
Die relativen Intensitäten der vibronischen Teilbanden in den Elektronenabsorptionspektren eines neuen Merocyanins werden deutlich durch die Polarität des Lösungsmittels beeinflusst. Eine zunehmende Polarität erhöht die πLadungsdichte-Alternierung in der Polymethinkette und verringert die Bindungslängenalternierung. E…
The frequency dependence of the magnetoelectric (ME) voltage is investigated in a thick film multilayer consisting of nickel zinc ferrite and lead zirconate titanate. A maximum in the ME voltage is observed at 1.5–2 kHz, well below the frequency for bending or acoustic modes in the sample. A model that takes into acco…
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…