Materials Literature
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The effect of zinc promotion on the oxidation state of cobalt in Co/ZrO(2) catalysts was investigated and correlated with the activity and selectivity for ethanol steam reforming (ESR). Catalysts were synthesized by applying incipient wetness impregnation and characterized by using Brunauer-Emmett-Teller (BET), temper…
The 2D C/C-ZrC-SiC composites were prepared through precursor infiltration and pyrolysis (PIP) process using a hybrid precursor contained polycarbosilane and organic zirconium-contained polymeric precursor. The microstructures and ablation behaviors of the prepared composites were studied. The composition and microstr…
Nanoporous carbon refers to a broad class of materials characterized by nanometer-size pores, densities lower than water, large specific surface areas, and high porosities. These materials find applications in nanocatalysis and gas adsorption, among others. The porosity structure, that determines the properties and fu…
Soda als Wasserstoffspeicher: Natriumbicarbonat wurde in wässriger Lösung bei 100 bar H2 in Gegenwart eines RuII-Katalysators zu Natriumformiat hydriert, das bei Druckminderung wieder das Bicarbonat ergibt. Dieses echte Ladungs-/Entladungselement für die Speicherung und Freisetzung von Wasserstoff kommt ohne die Isoli…
Klare Sicht: Das aufkonvertierte Emissionsspektrum von KMnF3-Nanokristallen, die mit Yb/Er (18:2 Mol-%; siehe Bild) oder Yb/Ho (18:2 Mol-%) dotiert sind, offenbart starke Einzelbandemissionen. Die Anwendung dieser unvermischten Emission für die Bildgebung von tiefliegendem Gewebe wird demonstriert.
Stuck together: adenine/carbon nanotube hybrids trigger the formation of controlled-size catalytic silver nanoparticles on the nanotube surface. The catalytic efficiency of the resulting species was assessed in the oxidation of 2-methylhydroquinone to its corresponding benzoquinone, with complete recovery and without…
ZnO/SiO(2) core/shell particles were fabricated by successive coating of multilayer polyelectrolytes and then a SiO(2) shell onto ZnO particles. The as-prepared ZnO/SiO(2) core/shell particles were coated on poly(ethylene terephthalate) (PET) textiles, followed by hydrophobization with hexadecyltrimethoxysilane, to fa…
Trigger happy: Polysilsesquioxane (PSQ) nanoparticles that contain a PtIV-based active agent (1; see picture) can be used for the triggered delivery of chemotherapeutics. The cytotoxicity of 1 was superior to that of oxaliplatin against four cancer cell lines in vitro, and targeting further enhanced the cytotoxicity.…
CuO is an earth‐abundant, nontoxic, and low band‐gap material; hence it is an attractive candidate for application in solar cells. In this paper, a synthesis of CuO nanocrystals by a facile alcohothermal route is reported. The nanocrystals are dispersible in a solvent mixture of methanol and chloroform, thus enabling…
Abstract Self‐healing materials with dual interpenetrating microvascular networks enable two‐part healing chemistries and repeated healing of damage in a localized region. However, due to slow healing kinetics, multiple days are required between damage events to recover mechanical performance under ambient conditions.…
In order to assess the potential of porous Si as thermoelectric material we have performed thermal conductivity measurements in dependence of both temperature and average structure size. Investigations on samples with average structure sizes between 7 nm and 100 nm reveal a pronounced reduction in thermal conductivity…
The magnetic properties of the transition metal monoxides MnO and NiO are investigated at equilibrium and under pressure via several advanced first-principles methods coupled with Heisenberg Hamiltonian Monte Carlo. The comparative first-principles analysis involves two promising beyond-local density functionals appro…
NaMgH3 has been considered as a potential hydrogen storage material and is an intermediary phase in a number of complex-hydride destabilization reactions. Using careful pressure−composition−isotherm measurements, the hydrogen equilibrium plateau was shown to be flat with negligible hysteresis. The enthalpy of desorpti…
Au-Ag core-shell nanoparticles have been synthesized using synthetic fluorescent dipeptide β-Ala-Trp (β-Ala is β-alanine; Trp is l-tryptophan) in water at pH 6.94 and at room temperature. The synthesis of the Au-Ag core-shell nanomaterial does not involve any external reducing and stabilizing agents, and the constitue…
The effect of hard segment (4,4′-diphenylmethane diisocyanate–1,4-butanediol) content on the molecular dynamics of a series of PTMO-based segmented polyurethanes was investigated using broadband dielectric spectroscopy. The microphase-separated morphology and degrees of separation, extensively characterized in a previ…
We report on the enhancement of antiferromagnetic coupling in epitaxial Fe/Si/Fe structures by voltage-driven spin-polarized tunneling currents. Using the ballistic electron magnetic microscopy we established that the hot-electron collector current reflects magnetization alignment and the magnetocurrent exceeds 200% a…
We study heat current autocorrelation function and thermal conductivity in core-shell nanowires by using molecular dynamics simulations. Interestingly, a remarkable oscillation effect in heat current autocorrelation function is observed in core-shell NWs, while the same effect is absent in pure silicon nanowires, nano…
Layered fabric systems with an electrospun nanofiber web layered onto a sandwich of woven fabric were developed to examine the feasibility of developing breathable barrier textile materials. Some parameters of nanofiber mats, including the time of electrospinning and the polymer solution concentration, were designed t…
The addition of 2,2'-bipyridine to [U(Tp(Me2))(2)I] (1) results in the displacement of the iodide and the formation of the cationic uranium(III) complex [U(Tp(Me2))(2)(bipy)]I (2). This compound was isolated as a dark-green solid in good yield and characterized by IR and NMR spectroscopies, and its molecular structure…
We investigate the role of dipolar interactions on the magnetic properties of nanowires aggregates. Micromagnetic simulations show that dipolar interactions between wires are not detrimental to the high coercivity properties of magnetic nanowires composites even in very dense aggregates. This is confirmed by experimen…