Materials Literature
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Abstract The oxidation of methanol in a flow reactor has been studied experimentally under diluted, fuel‐lean conditions at 650–1350 K, over a wide range of O 2 concentrations (1%–16%), and with and without the presence of nitric oxide. The reaction is initiated above 900 K, with the oxidation rate decreasing slightly…
Temperature-driven structural transformations in Pb-based perovskite-type relaxors are studied by using polarized Raman spectroscopy, high-resolution powder, and synchrotron single-crystal x-ray diffraction applied to ${\text{PbSc}}_{0.5}{\text{Ta}}_{0.5}{\text{O}}_{3}$ (PST) and ${\text{Pb}}_{0.78}{\text{Ba}}_{0.22}{…
Abstract We describe a novel class of electrically conductive transparent materials based on multiwalled carbon nanotubes (MWCNTs). Transparent nanocomposites were fabricated by incorporating an aqueous silk fibroin solution into bacterial cellulose membranes. The transparent nanocomposites had a high transmittance in…
We have reported the 25Mg triple-quantum magic-angle spinning (3QMAS) NMR spectra of silicate glasses. The two-dimensional spectra suggest that the magnesium ions in MgSiO3, CaMgSi2O6, Ca2MgSi2O7, Mg3Al2Si3O12, and Li2MgSi2O6 glasses are mainly in octahedral environments, although in Na2MgSi2O6, K2MgSi2O6, and K2MgSi5…
Nonpolar amorphous and polar quasiamorphous phases of substrate-supported $\mathrm{Ba}\mathrm{Ti}{\mathrm{O}}_{3}$ and $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ were studied with x-ray photoelectron spectroscopy (XPS) to characterize the structural and chemical changes accompanying the transformation of the former into…
A trinuclear rare-earth metal hydride complex was synthesized from the dialkyl complex supported by a monoanionic [NNNN] macrocycle and shown to catalyze the hydrosilylation of olefins efficiently.
Development in the field of tissue engineering has brought much attention in the fabrication and preparation of scaffold with biodegradable synthetic polymer nanofibers. Electrospun biodegradable polymeric nanofibers are increasingly being used to fabricate scaffolds for tissue engineering applications as they provide…
This book provides a treatment of theories and applications in the rapidly expanding field of the crystallography of modular materials. Molecules are the natural modules from which molecular crystalline structures are built. In recent years, the attention has been focused on complex modules as the basis for a systemat…
The three-dimensional self-assembly of a nanocrystal superlattice, i.e., a super crystal, has attracted increasing attention. The small building blocks for assemblies are usually spherical nanocrystals. Recent progress indicates that it is possible to achieve a super crystal using cubic nanocrystals. We further analyz…
We have synthesized the gold nanoparticles (GNPs) of different shaped by in situ reduction within the structure-directing low molecular weight gel template of tryptophan-containing peptide amphiphiles in water without using any external reducing or capping agents. Gold nanocrystals with sheet, wire, octahedral, and de…
Triboelectric charging occurs in granular systems composed of chemically identical particles even though there is no apparent driving force for charge transfer. We show that such charging can result from nonequilibrium dynamics in which collision-induced electron transfer generates electron accumulation on a particle-…
Abstract Functionalization of polydimethylsiloxanes (PDMS) polymers with hydrogen‐bonding ureidopyrimidinone (UPy) groups leads to supramolecular thermoplastic elastomers. In previous studies, no lateral stacking of UPy dimers was observed in UPy‐functionalized polymers, unless additional urethane or urea groups were…
Functionalized, dendrimer-stabilized gold nanoparticles (Au DSNPs) are of scientific and technological interest for biological applications. In this work, we show that acetamide-functionalized Au DSNPs can be formed by acetylation of amine-terminated poly(amidoamine) (PAMAM) dendrimers of generation 5 (G5.NH(2)) compl…
The electronic structure of the oxygen vacancy in ZnO has been found to be sensitive to the corrections applied to the local (spin) density approximation (LSDA) band gap underestimate. Here, the ``$\mathrm{LSDA}+U$'' approach, in which Hubbard-$U$ corrections are added to the local density approximation, is applied to…
Low-coordinate Ti (III) fragments with controlled geometries designed specifically for sigma-H2 binding were grafted onto mesoporous silica using tri- and tetrabenzyl Ti precursors. The hydrogen storage capacity was tested as a function of precursor and precursor loading level. At an optimal loading level of 0.2 mol e…
This review critically examines the experimental aspects of dynamic wetting, considering extant data for different geometries. Both partial wetting and complete wetting are considered for cases that include droplets, fibers, tubes, and plates. The wetting of porous materials is also considered, along with the new fiel…
In this article mixed CuInP$_2$(S$_x$Se$_{1-x}$)$_6$ crystals were investigated by broadband dielectric spectroscopy (20 Hz - 3 GHz). The complete phase diagram has been obtained from these results. The phase diagram of investigated crystals is strongly asymmetric - the decreasing of ferroelectric phase transition tem…
Substitution of F-Bodipy with alkynylaryl residues at boron, at the pyrrolic core or at the meso position, provides unique tri-, tetra-, and pentasubstituted dyes. Substitution at the (pyrrolic) 2,6-positions provides substantial red shifts with quantum yields in the 40-90% range and excited-state lifetimes of 3-7 ns.…
Combinatorial materials science offers an exciting experimental strategy for rapidly surveying a wide array of materials chemistries and process variables coupled to the screening of structure and properties. Adapting approaches used in synthetic organic chemistry for applications such as pharmaceutical sciences and c…
A simple approach for the aqueous room temperature synthesis of marigold shape single crystalline fluorescent gold nanoflowers without using seeds or structure-regulating reagent and their SERS and electrocatalytic activity is described.