Materials Literature
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Etching of the GaAs(100) surface with aqueous ammonia solution is studied by highly surface-sensitive synchrotron-radiation photoemission spectroscopy. It is shown that such treatment effectively removes the native oxide layer leaving the surface covered with elemental arsenic, as well as arsenic hydroxides AsOH and A…
Electroless plating of Ni—P, Cu, Ag, and Cu—Ag on polyamide fabric was performed in the laboratory. The coating depositions were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy, thermal gravimetric analysis, and X-ray diffraction analysis, respectively. The flame retardancy, a…
We demonstrate diameter-dependent, progressive alkylcarboxylation of single-walled carbon nanotubes by recycling a modified Billups-Birch reaction. The strong diameter dependence was confirmed by Raman spectroscopy. Alkylcarboxylation made SWNTs soluble in water, allowing the more readily functionalized, smaller diame…
We have measured the spin-polarized electron momentum density distributions of EuFe2(As0.73P0.27)2 by magnetic Compton scattering (MCS) measurements. For the first time, we show direct evidence of competing ferromagnetism and superconductivity (SC) on FeAs layers in this iron pnictide system. The MCS orbitalwise decom…
Spinel-type Co3O4 nanopyramids grown by CVD starting from Co(hfa)2•TMEDA display attractive features for hydrogen production by photo-reforming of methanol solutions, especially in the presence of oxygen in the reaction medium. To the best of our knowledge, this is the first example of photo-activated H2 generation by…
This Article addresses the important issue of the characterization of surface functional groups for optical bioassay applications. We use a model system consisting of spherical dye-doped silica nanoparticles (NPs) that have been functionalized with amine groups whereby the encapsulated cyanine-based near-infrared dye…
A facile solution process for the preparation of anisotropic silica nanoparticles (ASNPs) is presented. ASNPs are prepared via controlled self-assembly of spherical silica seeds (22 nm) in alcohol-water mixed media, followed by their in situ fixation and overgrowth with tetraethoxysilane (TEOS). Ethanol and L-arginine…
(1-x)PVDF-xBaTiO3 ceramic-polymer composites with x = 0.10, 0.20, 0.30 were prepared using melt growth technique. The crystal symmetry, space group and unit cell dimensions were determined from the XRD data of BaTiO3 using FullProf software, whereas crystallite size and lattice strain were estimated through Williamson…
Elastic properties of the face and core layers of commercial three-layer particleboards were examined. The method of compressing the block specimens glued from strips of layers separated from boards, and measuring specimen deformations by the electric resistance strain gauge technique was used. The layers were assumed…
In the present work, the effect of partial substitution of barium by calcium in Ba5NdTi3Nb7O30 has been investigated. The samples were synthesized by solid state reaction method and studied for their structural, dielectric, conductivity and ferroelectric properties. The X-ray diffractograms confirm the formation of si…
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Abstract Anionically charged fluorescent conjugated polyelectrolytes of poly{[4,7‐(2,1,3‐benzothiadiazole)‐ alt ‐1,4‐phenylene]‐ co ‐[2,5‐bis(4‐sulfonatobutoxy)‐ alt ‐1,4‐phenylene]} ( P1 ) and poly{[4,7‐(bis(thiophen‐2‐yl)benzo‐2,1,3‐thiadiazole)‐ alt ‐1,4‐phenylene]‐ co ‐[2,5‐bis(4‐sulfonatobutoxy)‐ alt ‐1,4‐phenyle…
Abstract We report the synthesis, micellar structures, and multifunctional sensory properties of new conjugated rod‐coil block copolymers, poly(3‐hexylthiophene)‐ block ‐poly(2‐(di methylamino)ethylmethacrylate)(P3HT‐ b ‐PDMAEMA). The new copolymers, synthesized by atom transfer radical polymerization of P3HT macroini…
We report on the development of novel cyano-biphenyl-based thiolate self-assembled monolayers designed to promote homeotropic alignment of calamitic liquid crystals. The molecules developed contain an ortho-nitrobenzyl protected carboxylic acid group that on irradiation by soft UV (365 nm) is cleaved to yield carboxyl…
Combined DFT calculations and UV-vis-NIR, ESR, and SQUID measurements revealed that the ground-state electronic structure of a linear π-conjugated oligomer dication composed of two pyrrole and six or seven thiophene rings and methylthio end-capping units is dominated by a singlet biradical character.
Vacancies and interstitials absorbed at Cu-Nb interfaces are shown to migrate by a multistage process involving the thermally-activated formation, motion, and annihilation of kinks and jogs on interface misfit dislocations. This mechanism, including the energy along the entire migration path, can be described quantita…
Abstract A polythiophene derivative substituted with electron‐rich alkynes as a side chain was synthesized using the Suzuki polycondensation reaction. The electron‐rich alkynes underwent the “click chemistry”‐type quantitative addition reaction with strong acceptor molecules, such as tetracyanoethylene (TCNE) and 7,7,…
BACKGROUND: There is an increasing number of proteins with known structure but unknown function. Determining their function would have a significant impact on understanding diseases and designing new therapeutics. However, experimental protein function determination is expensive and very time-consuming. Computational…
Well defined polymeric nanotubules with diameters less than 100 nm are prepared through the template-assisted layer-by-layer method by controlling the ratio of polymer dimension to pore size. The molecular weight of the polymers, the chain conformation, and the aggregation condition are finely tuned by adjusting the v…
Barium strontium zirconate titanate ((Ba1−xSrx)(ZrxTi1−x)O3; BSZT, x = 0.25 and 0.75) ceramics with a highly crystalline structure were successfully synthesized using the combustion technique, in which urea performed an important role. The effect of calcination (1000–1300 °C) and sintering temperatures (1300–1550 °C)…