Materials Literature
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Abstract The morphology and mechanical properties of melt‐spun and post‐drawn isotactic polypropylene (iPP) tapes have been studied in order to examine their dependence on the post‐draw ratio applied. Special attention is focused on the characterization of the so‐called overdrawing behavior of the tapes; at a certain…
We perform ab initio density functional calculations to investigate the ideal shear deformation of SiC polytypes (3C, 2H, 4H and 6H). The deformation of the cubic and hexagonal polytypes in the small-strain region can be well represented by the elastic property of component Si 4 C-tetrahedrons. The stacking pattern in…
We report on detailed studies of the $n$-type doping dependence of the Raman response of double-wall carbon nanotubes using potassium intercalation. The charge transfer is monitored by a shift of the G line. Upon doping the G line shifts to higher frequencies for the outer and to lower frequencies for the inner tubes.…
The structural and electronic properties of a single-walled $4\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$ (3,3) carbon nanotube (CNT) adsorbed on the $\mathrm{Si}(001)$ surface are studied using a first-principles method. It is found that for CNTs parallel to the dimer rows, the surface trench is the most stable adsorp…
A new type of surface electromagnetic waves localized near the interface of the halves of the same transparent uniaxial magnetic gyrotropic medium is theoretically predicted. The gyration vectors of the halves are perpendicular to the interface and are oppositely directed to each other. Existence of such waves is due…
Abstract This research employed different procedures for out water and oil repellent finish on cotton fabrics with fluorocarbon copolymer or its hybrid materials. The experimental results indicated that fabrics processed with fluorocarbon copolymer have larger contact angle for water and oil repellent finish, and the…
Friedel–Crafts alkylation of octaphenyloctasilsesquioxane (OPS) introduces a hydrocarbon layer around the rigid OPS core (see figure). Although periodic order is maintained even in the melt, as determined from X-ray diffraction measurements, this layer provides access to low-melting solids for butyl, hexyl, octyl, and…
Abstract Reversibly crosslinked isotactic polypropylene (iPP) was prepared in the presence of dicumyl peroxide. The effects of the peroxide oxy‐radicals in the melt were investigated in relation to the modification of the polymer. The dynamic rheology analysis of the crosslinking process was carried out by using a pla…
Single-electron transport measurements have been carried out at 1.5 K on single-wall carbon nanotube (SWCNT) quantum dots (QDs) under terahertz (THz) irradiation with a frequency of 2.5 THz. The most important finding in this study was new side-peaks that appeared only under the THz irradiation. From the detailed anal…
Abstract Hybrids based on recycled high density polyethylene (RHDPE) and organic clay were made by melt compounding. The influence of blending method, compatibilizers, and clay content on clay intercalation and exfoliation, RHDPE crystallization behavior, and the mechanical properties of RHDPE/clay hybrids were invest…
Abstract Hydrogenation is an important method of chemical modification, which improves the physical, chemical, and thermal properties of diene‐based elastomers. Natural rubber latex (NRL) could be hydrogenated to a strictly alternating ethylene–propylene copolymer using diimide generated in an in situ system. The diim…
Thin lead sulfide films were grown on single crystal GaAs(100) substrates by chemical deposition using Pb(NO3)2 and CS(NH2)2 with excess of NaOH in aqueous solution at a range of deposition temperatures 0–50 °C. The microstructure and morphology evolution were studied as a function of the deposition conditions, result…
The efficiency of the ligand-building module of ARP/wARP version 6.1 has been assessed through extensive tests on a large variety of protein-ligand complexes from the PDB, as available from the Uppsala Electron Density Server. Ligand building in ARP/wARP involves two main steps: automatic identification of the locatio…
An accurate and versatile process for the fabrication of high-resolution 3D nanostructures combining top-down and bottom-up nanofabrication schemes is described here. The method is based on layer-by-layer (LBL) assembly of functionalized nanoparticles (NPs) bound together by means of supramolecular interactions betwee…
Abstract Phase diagram of boron is theoretically studied, with focusing mainly on difference between α and β phases. The melting curve is calculated by the pressure dependence of the bulk modulus of solid. It is found that the gradient of the melting curve is inverted at a high pressure. Based on this finding, a promi…
Cavitation bubbles are generated in water by low-energy femtosecond laser pulses in the presence of an ultrasonic field. Bubble dynamics and cavitation luminescence are investigated by CCD photography and photomultiplier measurements in dependence on the phase of the acoustic cycle at which the bubbles are generated.…
Abstract Two water‐soluble conjugated polyelectrolytes, poly(9,9′‐bis(6‐ N,N,N ‐trimethylammoniumhexyl)fluorene‐ alt ‐1,4‐(2,5‐bis(6‐ N,N,N ‐trimethylammoniumhexyloxy))phenylene) tetrabromide ( P1i ) and poly((10,10′‐bis(6‐ N,N,N ‐trimethylammoniumhexyl)‐10H‐spiro(anthracene‐9,9′‐fluorene))‐ alt ‐1,4‐(2,5‐bis(6‐ N,N,N…
Abstract Three novel diamine monomers ( VI , VII , and VIII ) were synthesized. These diamine monomers lead to a number of semifluorinated poly(ether imide)s when reacted with different commercially available dianhydrides like pyromellitic dianhydride (PMDA), benzophenone tetracarboxylic acid dianhydride (BTDA), 2,2‐b…
Abstract This review discusses recent advances in protein sensing using fluorescent polyelectrolytes that are mainly water‐soluble conjugated polymers. A quencher‐labeled substrate or fluorophore‐labeled substrate is generally used as a probe. In the presence of an enzyme, the linker between substrate and quencher/flu…
Brownian trajectory simulation methods are employed to fully establish the non-Gaussian fluctuation effects predicted by our nonlinear Langevin equation theory of single particle activated dynamics in glassy hard-sphere fluids. The consequences of stochastic mobility fluctuations associated with the space-time complex…