Materials Literature
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We demonstrate that graphene-based transparent and conductive thin films (GTCFs), fabricated by thermal reduction of graphite oxide, have very similar electronic and structural properties as highly oriented pyrolytic graphite (HOPG). Electron spectroscopy results suggest that the GTCFs are also semi-metallic and that…
Abstract Using a generic coarse‐grained bead‐spring model, Hoy and Robbins reproduced important experimental observations on strain hardening, specifically the generally observed Gaussian strain hardening response and its dependence on network density and temperature. Moreover, their simulation results showed that the…
Early formulations of the RCWA yield, implicated by the erroneous application of factorization rules to discrete Fourier transformations, poor convergence in certain cases. An explanation for this finding and an approach to overcome the problem for crossed gratings was first given by Li [J. Opt. Soc. Am. A 13, 1870 (1…
Solution processed inorganic/organic hybrid films of ZnO nanoparticles and poly(9,9-dihexylfluorene) (PFH) are sandwiched between two electrodes to form bulk heterojunction in this letter. The devices obtained show high ultraviolet photo-to-dark current ratio of about three orders of magnitude for −1V bias with a rela…
Domain-switching in BaTiO3 single crystal under an antiparallel electric field was investigated in this paper by polarized light microscope. It was found that 180° domain-switching consisted of two 90° switching steps. The polarization reversal of domains took place when an antiparallel electric field was applied to t…
Double-walled carbon nanotubes (DWNTs), consisting of two concentric coaxial tubes, are proposed as the preferable reinforcing filler in polymers. Chemical moieties, which are selectively introduced on the outer tubes, impart the ability to individualize and provide effective anchoring sites for strong bonding with po…
Heart disease and atherosclerosis are the leading causes of morbidity and mortality worldwide. The lack of suitable autologous grafts has produced a need for artificial grafts; however, current artificial grafts carry significant limitations, including thrombosis, infection, limited durability and the inability to gro…
A fully transformed α″ martensite with stress-induced nanoscale {110}, {021}-type compound twin or a 90° rotation twin has been experimentally explored and unambiguously characterized in traditional β-type Ti alloys, which usually undergo a partial martensitic transformation [a β grain partially transformed into α″ wi…
Abstract Multi‐scaled microstructures induced by natural impurities (i.e., proteins, phospholipids, carbohydrates) in natural rubber (NR) were investigated by synchrotron small‐angle X‐ray scattering (SAXS), wide‐angle X‐ray diffraction (WAXD), and optical microscopy using several kinds of untreated and chemically tre…
This paper reports the synthesis of shell crosslinked nanoparticles (SCKs) of spherical and cylindrical shapes, and their functionalization with folate using a poly(ethylene glycol) (PEG) construct that has folate and an amine group as the opposing chain termini. By use of confocal microscopy, we demonstrate the selec…
High‐performance solid oxide fuel cells require a thin and gas‐tight electrolyte membrane that must be coated on a porous and relatively rough support. A pretreatment of the delivered submicronmeter electrolyte powder of 8 mol%‐yttria‐stabilized zirconia (8YSZ) yielded a reduced sintering mismatch between the anode su…
Abstract In this work, polypropylene/clay nanocomposites with 0.5, 1, 3, and 5 wt % of montmorillonite (MMT) (unmodified clay) were prepared by intensive mixing at 50 rpm and 10 min of mixing. For the highest clay content (5 wt %), the initial materials or the processing conditions were changed to study their independ…
The thermo-responsive polymer poly(N-isopropylacrylamide) is microcontact printed with fibronectin lanes. Cells seeded onto these substrates form globally aligned tissue sheets that can be harvested by lowering the temperature.
The pressure-temperature diagram of hydrogen-aluminum system was determined for a pressure range of 0–10GPa and a temperature range of 27–800°C by in situ x-ray diffraction measurements. Pristine aluminum was hydrogenated to trihydride at 8.9GPa and 600°C. The cyclic formation and decomposition of the hydride resulted…
In this paper, the levels of residual stress in the vicinity of linear friction welds in Ti–6Al–4V (Ti-64), a conventional α– β titanium alloy, and Ti–6Al–2Sn–4Zr–2Mo (Ti-6242), a near α titanium alloy with higher temperature capability, are mapped and contrasted. The alloys have significantly different high temperatu…
Abstract Mesoporous Ce‐doped Pd nanospheres with a hollow chamber are synthesized by chemical reduction of PdCl 2 with KBH 4 in an aqueous solution containing Ce(NO 3 ) 3 and Bu 4 PBr. The later acts as a template for the hollow chamber via forming organic vesicles. During the liquid‐phase phenol hydrogenation to cycl…
Transparent single-walled carbon nanotube (SWNT) films have their conductivity optimized by a multistep purification method and by the construction of a sandwich structure with chemical modification. The transparent and conducting SWNT films demonstrate great potential for applications in optoelectronic devices.
Silica thin films and nanoparticles prepared using sol-gel chemistry are derivatized with active molecules to generate new functional materials. The mild conditions associated with sol-gel processing allow for the incorporation of a range of dopants including organic or inorganic dyes, biomolecules, surfactants, and m…
The effect of tungsten carbide (WC) additions on the oxidation resistance of zirconium diboride (ZrB 2 ) was studied. Zirconium diboride ceramics, nominally pure and with the addition of 4 mol% WC, were densified by pressureless sintering. During densification, the WC that was added to the ceramic dissolved into the Z…
We present an ab initio study which identifies dominant effects leading to thermal conductivity reductions in carbon and boron-nitride nanotubes with isotope disorder. Our analysis reveals that, contrary to previous speculations, localization effects cannot be observed in the thermal conductivity measurements. Observa…