Materials Literature
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The light-emission efficiency in Si LEDs with nanoscale trench structure on the top surface can be enhanced about ten times than it in the control planer device. The photonic-crystal effect, the characteristics of the special wavelength extraction, is also observed successfully. The experimental data agree well with t…
Abstract Monte Carlo simulations are performed to study the binding of peptides (M1: 1 H 2 G 3 I 4 N 5 T 6 T 7 K 8 P 9 F 10 K 11 S 12 V) to a stack of mobile clay platelets and evaluate the morphological responses on a cubic lattice. A coarse‐grained description is used to model both platelets and peptides capturing t…
Several molecules are known to contain stable silicon double or triple bonds that are sterically protected by bulky side groups. Through first-principles computation, we demonstrate that well-defined π bonds can also be stabilized in a prototypical crystalline Si structure: Schwarzite Si-168, when modest negative pres…
This paper examines the microstructure of sintered magnesia partially stabilized zirconia (Mg–PSZ) with alumina and titania additions. Two effects are mainly responsible for enhanced thermal shock performance, microcrack generation by zirconia destabilization and in situ spinel formation as well as development of a du…
Abstract Zirconium alloys are commonly used in pressurized water reactor as fuel rod cladding tubes. After irradiation and cooling in pool, the spent nuclear fuel assemblies are either transported for wet storage to a devoted site or loaded in suitable casks for dry storage on a nuclear power plant site. During dry tr…
Abstract For the first time, poly(ε‐caprolactone) and poly(ε‐caprolactone‐ co ‐ε‐caprolactam) nanoparticles were successfully obtained by anionic polymerization of ε‐caprolactone and anionic copolymerization of ε‐caprolactone with ε‐caprolactam, respectively, in heterophase by the miniemulsion technique. After polymer…
Abstract Interpenetrating polymer networks (IPNs) based on blocked polyurethane (BPU)/phenolic (PF) were prepared using simultaneous polymerization method. The IPN was prepared from BPU prepolymer with m ‐xylylenediamine as the chain extender and PF prepolymer using p ‐toluene sulfonic acid as a catalyst. From Fourier…
(a) Photoluminescence spectrum of the ZnO powders ob-tained with a He-Cd laser (325 nm). Inset shows the transmission electron microscopy (TEM) image of the ZnO powders used for the measurements. (b) Emission spectrum of the ZnO powders obtained by intensive excitation of fundamentals, such as 800, 750, and 710 nm. Th…
We have synthesized a series of push-pull porphyrins containing both donor and acceptor substituents at the mesopositions and have examined their spectral and biological properties. The push-pull porphyrins containing both strong donor <TEX>$NH_2$</TEX> and acceptor <TEX>$NO_2$</TEX> at meso-positions, in which donor…
We report the diagonal components of the electrical resistivity tensor of quasi-one-dimensional ${\text{SrNbO}}_{3.41}$, determined using the Montgomery method. The results confirm quasi-one-dimensional behavior but show a smaller anisotropy than previously reported. High-resolution linear thermal expansion reveals we…
Abstract The molecular orientation behavior of mesomorphic isotactic polypropylene films under biaxial extension was investigated at room temperature. The birefringence was measured not only for drawn films but also simultaneously with biaxial stresses. It was found that there exists a yield point at which the neck is…
Chloroprene is a chlorine substituent of 1,3-butadiene. Butadiene rubber (BR) and chloroprene rubber (CR) composites were thermally aged at 60, 70, 80, and <TEX>$90^{\circ}C$</TEX> for 2 - 185 days in a convection oven and changes of the crosslink densities by the accelerated thermal aging were investigated. The cross…
The investigated SiC nanowires were prepared by the “shape memory process” technique. Depending on the processing parameters, nanowires with different chemical compositions, i.e., with varying amount of Si, C, and O were obtained. The permittivity of the SiC nanowires was measured in the frequency range between 1 and…
CONTEXT: Epilepsy is a chronic condition characterized by recurrent unprovoked seizures. The most optimal use of drugs was limited due to their widespread systemic and central side effects. In contrast, focal drug delivery to epileptogenic focus based on superparamagnetic carrier is considered to be a promising and sa…
We report in this paper in detail on the excited-state dynamics of both metal-free phthalocyanine (H 2 Pc) and cobalt phthalocyanine (CoPc) thin films measured by pump-and-probe experiments. Samples are excited by femtosecond laser pulses at two different photon energies, which correspond to the two maxima of the Q-ba…
We propose general two-dimensional open-closed cloaks with controllable and inherent discontinuity, which is manipulated to create fully open, partially open, and fully closed cloaks rigorously. Multiple objects can be concealed separately in multiple controllable touching domains, with or without openings. The openin…
Abstract The surface of carbon black (CB) nanoparticles was functionalized with poly(vinylidene fluoride) (PVDF) either by trapping of macroradicals or by cycloaddition. PVDF with two iodine end groups (I‐PVDF‐I) obtained from iodine transfer polymerization in supercritical CO 2 was heated in the presence of CB and th…
Acetylated timber, thermally modified timber (TMT) and timber modified with dimethylol-dihydroxy-ethylenurea (DMDHEU) was impregnated with wax. Subsequently, the influence of hydrophobic wax deposits on the capillary water uptake and the strength properties of the pre- modified timber were investigated. The water upta…
Abstract A facile one‐step technique of preparing black polystyrene (PS) was developed by in situ suspension polymerization in which polymerization of styrene was conducted in the presence of modified carbon black (CB). A series of uniform black PS particles had been synthesized with this method. Morphology and disper…
Abstract The effects of the inclusion of silver (Ag) nanoparticles on the physical properties, the crystallization behavior under shear, and the consequential crystalline morphology of poly(vinylidene fluoride) (PVDF) were investigated. Ag nanoparticles were melt compounded with PVDF in weight fractions of 20, 50, and…