Materials Literature
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The on and off rates corresponding to the binding of two test anions (acetate, AcO(-), and dihydrogen phosphate, H(2)PO(4)(-), studied as their tetrabutylammonium salts) to diprotonated cyclo[8]pyrrole have been determined in CH(3)CN using stopped-flow analyses carried out at various temperatures. For dihydrogen phosp…
Structure and dielectric/piezoelectric properties of the sol–gel‐derived 0.36BiScO 3 –0.64PbTiO 3 (BSPT) thin films deposited on Pt(111)/Ti/SiO 2 /Si(100) substrates with PbO seeding layers are investigated. Highly (100)‐oriented BSPT thin films with thickness ranging from 250 to 950 nm were synthesized by alternative…
Abstract A photochemical transannular [2+2] cycloaddition reaction is the main reaction pathway for 1,3‐substituted styrylcalix[4]arenes, whereas 1,2‐distyrylcalix[4]arenes give calix[4]diphenanthrenes.
A series of 3,6-dialkoxythieno[3,2-b]thiophenes have been synthesized through three synthetic pathways. Symmetrical derivatives have been obtained from 3,6-dibromothieno[3,2-b]thiophene or by trans-etherification of 3,6-dimethoxythieno[3,2-b]thiophene while unsymmetrical derivatives have been easily prepared from the…
Pure BiFeO3 (BFO), Eu doped BFO (BEF), and Nd doped BFO (BNF) multiferroic films were prepared by pulsed laser deposition on Pt/Ti/SiO2/Si substrates. XRD analysis revealed that the films had the rhombohedral structure with doping-induced lattice distortion. The Eu and Nd doping significantly improved the dielectric,…
The single-crystal structure, paramagnetic, and oxygen-sensing characteristics of a new tetragonal polymorph of lithium octa- n -butoxynaphthalocyanine, LiNc-BuO (T g ), is reported. The compound was synthesized as fine, diamond-shaped, neutral radical crystals by reacting octa- n -butoxynaphthalocyanine (Nc-BuO) with…
Statistics of the free volume available to individual particles have previously been studied for simple and complex fluids, granular matter, amorphous solids, and structural glasses. Minkowski tensors provide a set of shape measures that are based on strong mathematical theorems and easily computed for polygonal and p…
Ternary copper ferrite and copper cobalt ferrite nanotubes were deposited via a chemical vapor deposition process utilizing decomposing solid precursors under oxygen flow into anodic aluminum oxide templates heated to 450 °C. Extracted nanotubes were subsequently calcined at 450 °C for 12 h. Transmission electron micr…
A new optical-based nanostructured materials having coumarin 480 dye confined within Y-zeolite and Y-zeolite functionalized Au nanoparticles has been designed for light-harvesting system. Unprecedented PL quenching (94%) of confined dye and efficient energy transfer (70%) between confined dye and Au nanoparticles are…
The Fuel Cycle R&D (FCRD) initiative is investigating methods of burning minor actinides in a transmutation fuel. To achieve this goal, the fast reactor core materials must withstand very high doses. Small scale materials testing methods in addition to large scale materials testing allows one to gain more insight by p…
Composite electrodes extend the electrochemically active region for solid oxide fuel cells. The complex microstructural and chemical composition of composite cathodes often make them difficult to fully characterize. The discrimination between the two oxide phases of the composite cathode as well as between them and th…
Abstract The crystal modifications and multiple melting behavior of poly( L ‐lactic acid‐ co ‐ D ‐lactic acid) (98/2) as a function of crystallization temperature were studied by wide‐angle X‐ray diffraction (WAXD) and differential scanning calorimetry (DSC). It was found that the disorder (α′) and order (α) phases of…
Introducing hard spherical polysilicate nanoparticles up to 0.30 volume fraction into narrow molecular weight ( M ) fractions of poly(dimethylsiloxane) (PDMS) that spanned its unentangled and entangled polymer chain regimes produced transparent and colorless polymer nanocomposites (PNCs) with zero-shear-rate viscositi…
Single-phase HoCrO3 samples were prepared using the conventional solid-state reaction. The temperature dependence of dc magnetic properties show that the ZFC and FC magnetization curves are irreversible strongly and nearly symmetrical below 141.0 K under 100 Oe. Moreover, there appears a novel magnetization behavior w…
The conversion of gas adsorption isotherms into pore size distributions generally relies upon the assumption of thermodynamically independent pores. Hence, pore-pore cooperative adsorption effects, which might result in a significantly skewed pore size distribution, are neglected. In this work, cooperative adsorption…
We investigate how ligand substitution affects the intramolecular spin exchange interactions, studying a prototypical family of single-molecule magnets comprising dodecanuclear cluster molecules [Mn(III)(8)Mn(IV)(4)O(12)(COOR)(16)]. We identify a simple scheme based on accumulated Pauling electronegativity numbers (AE…
The effect of interdomain ferroelastic coupling in ferroic multilayers is investigated theoretically. Specifically, we use nonlinear thermodynamics to analyze a heteroepitaxial ferroelectric PbZrxTi1-xO3 (PZT) bilayer consisting of (001) tetragonal (T) PZT and (001) rhombohedral (R) PZT films. We predict for certain m…
Multiferroic BiFeO3 has attracted extensive interest due to its potential in several applications. However, pure-phase BiFeO3 is very difficult to obtain. Hence, mixing BiFeO3 with other ferroelectrics, such as BaTiO3, is another approach to obtain materials with possible multiferroic properties. In this study, the Bi…
Rapid synthesis of gold nanorods of controlled dimensions is one of the desired aspects of nanotechnology as a result of the potential of these nanomaterials for biomedical applications. The synthesis of gold nanorods has been achieved using a photoinitiator as an instant source of ketyl radicals, which allows the syn…
Single crystals of dark-red MgB(7) were grown from the elements in a Cu-melt. The crystal structure (Pearson symbol oI64; space group Imma; a = 10.478(2) Å, b = 5.977(1) Å, c = 8.125(2) Å, 2842 reflns, 48 params, R(1)(F) = 0.018, R(2)(I) = 0.034) consists of a hexagonal-primitive packing of B(12)-icosahedra and B(2)-u…