Materials Literature
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Abstract This article presents research findings for selected mechanical properties of polyurethane elastomers. The studied elastomers were synthesized with the prepolymer‐based method with the use of controlled molecular weight distribution (MWD) urethane oligomers and with the classical single‐stage method. Prepolym…
Abstract Preparation of superhydrophobic silica‐based surfaces via sol–gel process by adding polyethylene glycol (PEG) polymer into the precursor solution has been developed. Surface roughness of the films was obtained by removing the organic polymer at 500°C and then the hydrophobic groups bonded onto the films were…
Studies have been performed on both as-received and chemically oxidized single-walled carbon nanotubes (SWCNTs) grown by two different growth methods to better understand the preferential association of the oligodeoxyribonucleotide T30 (ODN) with SWCNTs. Samples of T30 ODN:SWCNT were examined under ambient conditions…
We report on the nanoscale domain switching behaviour in polycrystalline tetragonal perovskite lead zirconate titanate (PZT) ferroelectric thin films investigated via piezoresponse force microscopy (PFM). Local domain structures were imaged as a function of varying biasing conditions and spatial location of the tip wi…
Abstract Chiral amino alcohol based tridentate Schiff bases, derived from 5‐OMe‐, 5‐H‐, and 5‐NO 2 ‐substituted salicylaldehydes and ( S )‐(+)‐2‐phenylglycinol and ( S )‐(–)‐2‐amino‐3‐phenyl‐1‐propanol, were found to act as versatile ligands in their coordination behavior towards cobalt and gave a range of complexes l…
Quaterthiophene-dinucleotide conjugates 5'TA3'-t4-3'AT5', 5'AA3'-t4-3'AA5', and 5'TT3'-t4-3'TT5' (TA: thymidine-adenosine, AA: adenosine-adenosine, TT: thymidine-thymidine) were synthesized and analyzed by a combination of spectroscopy and microscopy, electrical characterization, and theoretical calculations. Circular…
The relaxor-type behavior, electrical polarization buildup, and switching in 0.92Pb(Zn(1/3)Nb(2/3))O(3)-0.08PbTiO(3) nanostructured ceramics with a grain size of approximately 20 nm is reported for the first time. This composition presents the highest-known piezoelectric coefficients, yet phase stability is an issue.…
Carbon nanotubes have been shown to efficiently quench luminescence from conjugated polymers when incorporated in a composite. However, shown here is an up to 100-fold increase in the visible photoluminescence signal from fluorescent chromophores in nylon 10,10 by incorporating multi-walled carbon nanotubes (MWCNTs).…
Single crystals of ice subjected to primary creep in torsion exhibit a softening behavior: the plastic strain rate increases with time. In a cylindrical sample, the size of the radius affects this response. The smaller the radius of the sample becomes while keeping constant the average shear stress across a section, t…
Abstract This article presents a method of preparing the absorbent core for an ultrathin sanitary napkin using super absorbent fiber (SAF) and viscose fiber blends with varying SAF percentages and mass per unit area (g/m 2 ). The SAF/viscose blended carded webs were sandwiched between two layers of nonwoven fabric to…
Based on a method of molecular structural mechanics (MSM), the effect of environmental temperature on elastic properties of armchair and zigzag single-walled carbon nanotubes is investigated. Single-walled carbon nanotubes with different chiral vectors are considered as a molecular structural mechanics model, which is…
A highly ordered anodic aluminum oxide (AAO) membrane (see image; scale bar=200 nm), with diameters of 12 nm and a center-to-center hole distance of 45 nm, is prepared using a block-copolymer template prepared by a solvent-induced reconstruction of a thin film of poly(styrene-b-4-vinylpyridine) (PS-b-P4 VP). Subsequen…
Single-phase hollow poly( o -anisidine) colloidal spheres with uniform sizes were directly synthesized in dilute aqueous solution of o -anisidine in the presence of a small amount of an initiator, cupric acetate or basic cupric bromide, Cu 2 (OH) 3 Br, under hydrothermal conditions. The void volume and size of hollow…
Silicon carbide films with different carbon concentrations x(C) have been synthesized by inductively coupled plasma chemical vapor deposition from a SiH(4)/CH(4)/H(2) gas mixture at a low substrate temperature of 500 °C. The characteristics of the films were studied by x-ray photoelectron spectroscopy, x-ray diffracti…
Hyperbranched poly(ferrocenylphenylenes) ( hb -PFPs) with high molecular weights were synthesized by the copolycyclotrimerizations of ( E, E )-1,1‘-bis[2-(4-ethynylphenyl)vinyl]ferrocene ( 1 ) with ( E )-1-[2-(4-ethynylphenyl)vinyl]ferrocene ( 2 ) catalyzed by TaCl 5 −Ph 4 Sn at room temperature in high yields (up to…
Nanorods based on the use of small-chain organic ligands as capping agents are synthesized. Neither strong ligands, such as phosphonic acids, nor high concentrations of the reactants are required. Favored crystallization along the c-axis in the wurtzite crystals results in nanorod formation (see image). Longer ligands…
A series of novel In 2 O 3 nano/microstructures, namely, nanocubes, truncated nanocubes, and multipods, were controllably synthesized by the thermal evaporation of metallic In grains at 850 °C. The crystalline structure and morphologies of the In 2 O 3 products were characterized using X-ray diffraction, field-emissio…
Abstract In this study, porous three‐dimensional (3‐D) materials were prepared with the regenerated Antheraea pernyi ( A. pernyi ) silk fibroin by freeze‐drying from a lithium thiocyanate solution of its fibers. The relationship between preparation conditions and morphological structures of 3‐D materials was also stud…
The long and short of it: An ionic liquid with good thermal stability can be prepared from 100–500-nm-long multi-walled carbon nanotubes (MCNTs). The MCNTs are functionalized with a polysiloxane quaternary ammonium compound followed by a sulfonate salt. A coating of average thickness 6.5 nm comprising an ionic bilayer…
The limited penetration of cytotoxic drugs into tumors is a significant contributing factor to the limited effectiveness of cancer chemotherapy. Here we have shown that X-ray fluorescence microtomography is a suitable technique for imaging the distribution of Pt drugs within multicellular tumor spheroids, models of so…