Materials Literature
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Abstract A new concept is described for the creation of multifunctional polymer nanocomposite tapes (or fibres) that combines high stiffness and strength with good electrical properties and a low percolation threshold of carbon nanotubes (CNTs). The concept is based on a bicomponent tape (or fibre) construction consis…
Low-temperature $(2\text{ }\text{K}\ensuremath{\le}T\ensuremath{\le}350\text{ }\text{K})$ heat capacity and room-temperature shear modulus measurements $(\ensuremath{\nu}=1.4\text{ }\text{MHz})$ have been performed on bulk ${\text{Pd}}_{41.25}{\text{Cu}}_{41.25}{\text{P}}_{17.5}$ in the initial glassy, relaxed glassy,…
This perspective seeks to identify an area of soft materials research focused on the study of functional polyelectrolytes. These materials combine the useful properties intrinsic to polyelectrolyte chains, with added functionality provided by specific molecular (or polymeric) functional groups that are present in the…
The feasibility of using carbon nanotube (CNT) bundles as the fillers of through silicon vias (TSVs) has been demonstrated. CNT bundles are synthesized directly inside TSVs by thermal chemical vapor deposition (TCVD). The growth of CNTs in vias is found to be highly dependent on the geometric dimensions and arrangemen…
Many fascinating CdS hierarchical nanostructures, including nanobelt networks, flower/sphere networks by nanobelts/wires self-assembly, and nanowires, have been successfully prepared in high yields and purities by a novel dithizone (DTZ) and tetraethylenepentamine (TEPA)-synergistically directed method. A detailed stu…
Nanotechnology is a relatively new field that can be employed to deliver substantial advances in most disciplines. Nanoparticles and nanostructures are of particular interest as their characteristics on the nanoscale are different to that of their bulk counterparts. Therefore, it is highly desirable to observe the evo…
Nanotube networks self-assembling from asymmetric bolaamphiphile, N -(β- d -glucopyranosyl)- N′ -(2-glycylglycylglycineamideethyl)-octadecanediamide 1, acted as hydrogelators. The obtained nanotube hydrogel was able to separately fix a green fluorescent protein (GFP) and a myoglobin (Mb) into not only independent nano…
Poly(ethylene oxide) confined in an anodic aluminum oxide solid matrix has been studied by different neutron scattering techniques in the momentum transfer (Q) range 0.2<or=Q=/Q/<or=1.9 A(-1). The cylindrical pores of the matrix present a diameter (40 nm) much smaller than their length (150 microm) and are parallel an…
A DTPA-Gd containing polymer was grown in the interior of a heat shock protein cage resulting in T(1) particle relaxivities of 4200 mM(-1) sec(-1) for the 12 nm particle. Relaxivity parameters were determined, and this analysis suggests that the rotational correlation time has been optimized while the water exchange l…
A unique combination of surface chemistry and self-assembly of amphiphilic block copolymers was employed to obtain—for the first time—solid-supported biomimetic polymer bilayers. An organized monolayer from sulfur-functionalized poly(butadiene)-b-poly(ethylene oxide) was covalently attached to ultrasmooth gold upon La…
Developing a robust crystallization process for an active pharmaceutical ingredient (API) molecule with a complex polymorphic profile can present a significant challenge. The presented case illustrates an unusual crystallization development problem where a polymorphically complex API has the additional obstacles of po…
The adsorption of bovine serum albumin (BSA) on surfaces of dental enamel and of dental materials was investigated by scanning force spectroscopy. This method provides adhesion forces which can be measured as a function of contact time between protein and surface, pH, wettability, and isoelectric point of the surface.…
BACKGROUND: Coronary bypass graft failure as a result of acute thrombosis and intimal hyperplasia has been the major challenge in surgical procedures involving small-diameter vascular prosthesis. Coating synthetic grafts with patients' own endothelial cells has been suggested to improve the patency rate and overall su…
Hydride transfer from dihydronicotinamide adenine dinucleotide (NADH) analogs to a manganese(IV)-oxo porphyrin complex, (TMP)Mn(IV)(O) [TMP = 5,10,15,20-tetrakis(2,4,6-trimethylphenyl)porphyrin], occurs via disproportionation of (TMP)Mn(IV)(O) to [(TMP)Mn(III)](+) and [(TMP)Mn(V)(O)](+) that acts as the actual hydride…
The synthesis and characterization of a new PEDOT-carbon composite prepared using a microporous carbon template are described. The electrochemical behavior of this composite, as well as that of three other colloidal materials-PEDOT-silica, PEDOT, and microporous carbon particles-is investigated with respect to their s…
The preparation, characterization, and application in oxidation reactions of new biomimetic catalysts are reported. Brazilian Sao Simao kaolinite clay has been functionalized with [meso-tetrakis(pentafluorophenyl)porphinato]iron(III), Fe(TPFPP). To obtain the functionalized clay, the natural clay was purified by dispe…
Two new cobalt(II) complexes of formula [Co(2)(bta)(H(2)O)(6)](n) x 2nH(2)O (1) and [Co(phda)(H(2)O)](n) x nH(2)O (2) [H(4)bta = 1,2,4,5-benzenetetracarboxylic acid, H(2)phda = 1,4-phenylenediacetic acid] have been characterized by single crystal X-ray diffraction. Compound 1 is a one-dimensional compound where the bt…
Abstract Biodegradable polymeric composites were fabricated from poly(butylene succinate) (PBS) and kenaf fiber (KF) by melt mixing technique. The mechanical and dynamic mechanical properties, morphology and crystallization behavior were investigated for PBS/KF composites with different KF contents (0, 10, 20, and 30…
Fatigue crack initiation in titanium alloys is typically accompanied by the formation of planar, faceted features on the fracture surface. In the present study, quantitative tilt fractography, electron backscatter diffraction (EBSD), and the focused ion beam (FIB) have been used to provide a direct link between facet…
TiC as a novel catalyst was used in preparing TiC-doped sodium aluminum hydride by ball-milling NaH/Al mixture or NaAlH 4 with TiC powder under a hydrogen atmosphere. It is found that TiC-doped NaH/Al composite absorbs 4.77 wt % hydrogen at 120 °C, desorbs more than 80% hydrogen of its initial hydrogen capacity at 155…