Materials Literature
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In this study we attempt to determine the interconnection of the nanocrystal and amorphous phases in two states of spider dragline silk, native, and supercontracted with water. Infrared spectroscopy is employed to measure crystal stress with a high time resolution, while varying mechanical fields are applied to the si…
The effect of varying preparation conditions on the properties of buckypapers made using single-walled carbon nanotubes (SWNTs) was systematically investigated. Changing the sonication time, final dispersion volume or membrane filter used to prepare SWNT–Triton X-100 buckypapers all generally had only a small influenc…
Epoxy–coal tar coatings are widely used to protect steel structures exposed to marine atmosphere due to their good barrier property. However, the presence of micropores and microcracks formed during the coating formation leads to failure of the coating due to permeation of corrosive ions. In recent years, it has been…
The stacking fault energy plays a significant role in defining the type of plasticity mechanism which prevails in high-Mn steels. Therefore, a detailed understanding and control over the physical mechanisms that influence the stacking fault energies is crucial for effective design and optimization of such steels. We p…
The entire wound healing process is a complex series of events that begins at the moment of injury and can continue for months to years. The stages of wound healing are inflammatory phase, proliferation phase, fibroblastic phase and maturation phase. The Latex of Calotropis gigantean (200 mg/kg/day) was evaluated for…
A new polyoxometalate-templated Mo/V-oxide-based organic-inorganic hybrid framework with a honeycomb-like structure has been hydrothermally synthesized and its electrocatalytic property was investigated.
Models consisting of an amine-terminated poly(amidoamine) (PAMAM) dendrimer with and without the presence of a linear poly(ethylene oxide) (PEO) chain were studied in aqueous solutions by means of fully atomistic molecular dynamics simulations. Dendrimers of two generations, 3rd and 4th and at different pH conditions…
A TiO(2) photocatalyst sensitized by graft surface complexes of lacunary Wells-Dawson heteropoly blue (HPB) exhibited 20.0% quantum efficiency for H(2) evolution under 670 nm irradiation.
We report the self-assembly processes in solution of three Keplerate-type molybdenum-oxide based clusters {Mo72V30}, {Mo72Cr30} and {Mo72Fe30} (all with diameters of approximately 2.5 nm). These clusters behave as unique weak polyprotic acids owing to the external water ligands attached to the non-Mo metal centers. Wh…
In this study, a new application method for SERS named "reversed reporting agent" method is proposed for selective detection of biomolecules with a thiol group. In this method reporting agents such as rhodamine 6G (R6G) are capped on surfaces of silver colloidal nanoparticles. Analytes having a thiol group will replac…
The mesoporous Ta2O5 material functionalized with both alkyl groups and a Keggin-type heteropoly acid, Ta2O5/SiO2–[H3PW12O40/R] (R = Me or Ph), was prepared in a single step by the combination of sol-gel co-condensation, templated self-assembly, and hydrothermal treatment in the presence of a triblock copolymer surfac…
Hydrogen permeation performance of palladium membranes supported on porous alpha-alumina and yttria-stabilized zirconia (YSZ) was studied at 300-850 degrees C. The hydrogen permeation flux across the palladium-alpha-alumina membrane decreased markedly during permeation tests conducted at >600 degrees C. The SEM and XP…
Fluorescent nanodiamond (FND) contains nitrogen-vacancy defect centers as fluorophores. The intensity of its fluorescence can be significantly enhanced after deposition of the particle (35 or 140 nm in size) on a nanocrystalline Ag film without a buffer layer. The excellent photostability (i.e. neither photobleaching…
A facile methodology was presented for scalable synthesis of hyperbranched-star polymers with tens of hydrophilic and hydrophobic hetero-arms, in merely two steps starting from monomers. Self-condensing atom transfer radical polymerization (SC-ATRP) of a clickable initiator-monomer (click-inimer), 3-azido-2-(2-bromo-2…
Cadmium-rich CdS nanotubes were directly obtained at the air–water interface by a new photochemical route. Under ultraviolet light irradiation, branch-like lamellas were first formed on the surface of the precursor solution, and then they bent into nanotubes because of the composition difference between the two sides…
A simple and generic method is described to prepare polymeric sub-micron fibers by freeze drying dilute polymer solutions; these polymeric fibers are then used as templates to fabricate inorganic structures via a sol-gel process or ion crosslinking reaction.
We report a pH-mediated synthetic route for the production of ordered and size-tuneable arrays of gold nanorings using responsive block copolymer micelles as templates.
The electrical and magnetic characteristics of La 0.7 Sr 0.3 MnO 3 (LSMO) epitaxial manganite films are investigated by different methods under conditions when the crystal structure is strongly strained as a result of mismatch between the lattice parameters of the LSMO crystal and the substrate. Substrates with lattic…
This work reviews the state-specific multireference coupled-cluster (CC) approaches which have been developed as approximate methods for performing high-level quantum mechanical calculations on quasidegenerate ground and excited states of atomic and molecular systems. The term "quasidegenerate" refers to a state that…
We introduce a biotemplating approach for creating highly entangled hollow TiO2nanoribbons by combining peptide assembly with an atomic layer deposition process. An aromatic peptide of diphenylalanine was readily assembled into a hierarchical organogel consisting of highly entangled nanoribbons. Unlike ordinary biomat…