Materials Literature
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Deposition of CdS nanoparticles on SWCNTs produces a photoactive composite that undergoes charge transfer interactions following excitation with visible light (see Figure). The transient bleaching recovery in approximately 200 ps confirms quick deactivation of excited CdS on the SWCNT surface. Visible excitation of th…
Abstract The fracture process of six cucumber cultivars was examined to explore the mechanical properties that determine cultivar‐specific crispy and crunchy textures. The postfailure portion of the load–strain curves was targeted in cucumber compression tests. The series of fractures after the initial fracture were e…
Abstract Scanning electron microscopes are usually equipped with energy‐dispersive X‐ray detectors for electron probe microanalysis. This widespread analytical method allows investigators to determine the elemental composition of specimens with a spatial resolution of about 1 µm. However, owing to the electron–specime…
Abstract The utilization of a slug calorimeter to evaluate the thermal performance of fire resistive materials (FRMs) is presented. The basic specimen configuration consists of a ‘sandwich’, with a square central stainless‐steel plate (slug) surrounded on two sides by the FRM. This sandwich configuration provides an a…
Abstract A solvothermal route has been developed to prepare metastable wurtzite‐structure γ‐MnS hollow spheres from anhydrous manganese chloride, sulfur powder, and potassium borohydride in ethylene glycol at 150–180 °C. The metastable γ‐MnS and stable α‐MnS were characterized by X‐ray diffraction, X‐ray photoelectron…
Abstract In this study we report the synthesis of a new class of materials called hybrid periodic mesoporous organosilicas (HPMOs). By coupling a silsesquioxane precursor through at least two chemical linkages to the mesopore walls of a pre‐existing periodic mesoporous silica (PMS) or periodic mesoporous organosilica…
Abstract Summary: Polyimide‐mica hybrid films were prepared via ultrasonic dispersion and in situ polymerization process from a solution of a polyimide precursor and mica in N , N ‐dimethylacetamide, and their structure was characterized by FTIR and XRD techniques. The dependence of dielectric properties, such as diel…
Abstract Summary: Cornstarch derivative (ES), prepared using diethyl sulfate as an etherifying reagent, was blended with castor oil‐based polyurethane (PU) prepolymer to obtain a series of semi‐interpenetrating polymer network (semi‐IPN) materials, named as UES films. Simultaneously, other kinds of semi‐IPN (UBS2) wer…
Abstract Summary: We developed a facile approach to hyperbranched polymers by applying a superelectrophilic reaction within an A 2 + B 3 strategy. A significant reactivity difference between the intermediate and the starting material was utilized to avoid gelation in the A 2 + B 3 polymerization. A number of hyperbran…
Abstract Aim To provide a detailed biogeography of the diatom genus Stauroneis in the Antarctic and sub‐Antarctic regions and to establish the biogeographical relationships between the different constituent locations to test the application of a precise and refined taxonomy in generating accurate polar biogeographies.…
This work is focused on the understanding of charging and discharging processes in silicon nanocrystal flash memories during program and erase operations through time-dependent numerical simulations. Time dependent simulations of the program and erase operations are based on a description of the nanocrystal memory dyn…
The magnetic behavior of a solid solution, Ca3-xYxCo2O6, based on an exotic spin-chain compound, Ca3Co2O6, crystallizing in K4CdCl6-derived rhombohedral structure is investigated. Among the compositions investigated (x= 0.0, 0.3, 0.5, 0.75 and 1.0), single phase formation persists up to x= 0.75, with the elongation of…
The dynamics of non-equilibrium spin accumulation generated in metals or semiconductors by rf magnetic field pumping is treated within a diffusive picture. The dc spin accumulation produced in a uniform system by a rotating applied magnetic field or by a precessing magnetization of a weak ferromagnet is in general giv…
In the series of 3 d ( t 2 g ) 1 perovskites, SrVO 3 –CaVO 3 –LaTiO 3 –YTiO 3 , the transition-metal d electron becomes increasingly localized and undergoes a Mott transition between CaVO 3 and LaTiO 3 . By defining a low-energy Hubbard Hamiltonian in the basis of Wannier functions for the t 2 g LDA band and solving i…
We have studied the superconducting state of Sr$_2$RuO$_4$ under a magnetic field parallel to the superconducting plane. We show that due to a weak spin-orbit coupling, non-unitary k$_y(\hat{\mathbf{z}}-iα\hat{\mathbf{y}})$ state is formed right at H$_{c2}$, then changes to unitary k$_y\hat{\mathbf{z}}$ state, as a ma…
Using mixtures of repulsive superparamagnetic polystyrene particles and a photopolymerizable organic liquid (trimethylolpropane trimethacrylate) that are applied to a water surface, it is possible to prepare porous membranes with controlled porosity. The particles were polarized by applying a magnetic field H perpendi…
Acyl and alkyl radicals generated photochemically in a solution containing monolayer-protected gold nanoparticles are shown to efficiently liberate the alkylthiolate ligands into the solution as the thioacetyl or alkyl sulfide, respectively. This radical-induced reaction initiates a coalescence of the gold cores to fa…
Thin films of TiO2 (anatase) nanoparticles are assembled at an electrode surface via a layer-by-layer deposition process employing phytic acid, pyromellitic acid, or flavin adenine dinucleotide (FAD) as molecular binders. With all three types of binders, layers of typically 30 nm thickness are formed each deposition c…
Abstract A TTF derivative with an N1-tert-butyluracil moiety, TtbU, was prepared as a new electron-donor molecule capable of multiple hydrogen-bondings. Formation of the two different types of double hydrogen-bonding motifs, Watson–Crick and reverse Watson–Crick types, was demonstrated for the first time between TtbU…
Highly oriented microrods ZnO crystals having a narrow size distribution were successfully crystallized on Si wafers coated with SiCl 3 (CH 2 ) 11 −O−C 6 H 4 −COOH. The relationship between surface properties and the crystallization products was investigated by ellipsometry, wetting measurements, X-ray reflectivity (X…