Materials Literature
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Abstract Nanocomposite hydrogels were prepared by free‐radical polymerization of the monomers acrylamide (AAm), N,N‐dimethylacrylamide (DMA), and N‐isopropylacrylamide (NIPA) in aqueous clay dispersions at 21°C. Laponite XLS was used as clay nanoparticles in the hydrogel preparation. The hydrogels based on DMA or NIPA…
We report the first measurement of the Cu-O bond stretching phonon dispersion in optimally doped ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{1.6}{\mathrm{La}}_{0.4}{\mathrm{Cu}}_{2}{\mathrm{O}}_{6+\ensuremath{\delta}}$ using inelastic x-ray scattering. We found a softening of this phonon at $\mathbf{q}=(\ensuremath{\approx}0.25,…
Hydrophobic polypyrrole (PPy) coatings on zinc electrodes were prepared by a one-step electrochemical method. The process is ultrafast; 2 µm of PPy can be deposited in less than 3 s. It is thus compatible with industrial requirements for the coating of large surfaces for various industries (automotive, buildings, ship…
The $B$-spline $R$-matrix method with nonorthogonal orbital sets is extended to a fully relativistic version based on the solution of the many-electron Dirac equation. The $B$-spline basis is used to generate both the target description and the $R$-matrix basis functions in the inner region. Using $B$-splines of diffe…
As part of a large-scale thermophysical property measurement project, the global decomposition kinetics of the aviation turbine fuel Jet A was investigated. Decomposition reactions were performed at 375, 400, 425, and 450 °C in stainless steel ampule reactors. At each temperature, the extent of decomposition was deter…
A new open-framework aluminophosphate JIS-1 with unique Al/P ratio of 6/7 and intersecting 10-, 10-, and 8-rings channels has been prepared using 1-methylimidazole (MIA) and 1-methyl 3-ethylimidazolium bromide (EMIMBr) as the co-templates in ionothermal synthesis.
The chain dynamics and viscoelastic properties of poly(ethylene oxide) (PEO) were studied covering a wide range of molecular weights and temperatures. Two experimental techniques were used: rheology, in order to study the large scale viscoelastic properties, and neutron spin−echo (NSE) spectroscopy, to investigate the…
Carbon-supported PtRu—MoO x nanoparticles with significant CO tolerance were prepared by a new two-step procedure: in the first step, molybdenum oxide was deposited on a carbon substrate (MoO x /C) by impregnation, and in the second one, Pt and Ru were incorporated following a colloidal method with NaHSO 3 . The compo…
1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD) with pKa of 26.03 in acetonitrile can be effectively released by photolysis of TBD.HBPh4 salt, which represents a new family of short-wave UV photobase generators. This photobase generator enables the photoinduced living ring-opening polymerization of cyclic esters and the pho…
This work used sulfite as a coreactant to enhance the anodic electrochemiluminescence (ECL) of mercaptopropionic acid modified CdTe quantum dots (QDs). This strategy proposed the first coreactant anodic ECL of QDs and led to a sensitive ECL emission of QDs in aqueous solution at relatively low potential. In the presen…
Turning dots into stripes: Rationally designed DNA-tile arrays are used to organize quantum dots into well-aligned two-dimensional nanopatterns (see schematic representation and TEM image; A: streptavidin-coated quantum dots); the power of programmable DNA scaffolding is thereby demonstrated.
Abstract Metall‐organische Polyeder (MOPs) sind diskrete metall‐organische molekulare Anordnungen. Sie werden als Wirtmaterialien eingesetzt, und es besteht die Möglichkeit, die Hohlräume innerhalb der Struktur bezüglich Größe, Funktionalität und Art der aktiven Metallzentren gezielt einzustellen. Als Folge hiervon ko…
A novel fluorescent probe that possess both BODIPY and Rhodamine moieties has been designed for the selective detection of Hg(2+) and Ba(2+) ions on the controlling by a logic gate. The characteristic fluorescence of the Ba(2+)-selective OFF-ON and the Hg(2+)-selective fluorescence bathochromic shift can be observed,…
Postalkoxysilylation with diethoxydimethylsilane has been carried out on the zeolitic lamellar precursors of various topologies such as MWW, FER, CDO and MCM-47 aiming to construct new crystalline structures with expanded pore apertures between the layers. The silylation process and the crystalline and pore structures…
We study size and concentration effect of Au nanoparticles on the attenuation to X-ray used for computed tomography. By investigating size (4, 20, 38, and 60 nm) and concentration (up to 1 mg/ml) effect of GNPs, we demonstrate that GNPs are nontoxic to HeLa S3 cells and the smaller GNPs show greater X-ray attenuation…
Abstract In this work, hierarchical WO3 hollow shells: dendrites, spheres and dumbbells have been successfully synthesized by simply calcining the acid‐treated PbWO4 and SrWO4 as precursors at 500 °C for 2 h. These hollow structures were characterized using X‐ray diffraction, scanning and transmission electron microsc…
Metal-organic polyhedra (MOPs), are discrete metal-organic molecular assemblies. They are useful as host molecules that can provide tailorable internal volume in terms of metrics, functionality, and active metal sites. As a result, these materials are potentially useful for a variety of applications, such as highly se…
The luminescence properties of the ZnAl2(1−х)Cr2хS4 single crystals with different chromium content are investigated. The emission spectra of the samples with a small amount of chromium (х ⩽ 0.005) consist of the R-line (ER = 1.61 eV) and its phonon side band. At increasing of chromium concentration two new U-bands ce…
We investigate theoretically the formation of collective excitations in atomic scale quasi-one-dimensional metallic nanostructures. The optical response of the system is calculated within the linear-response theory and the random-phase approximation. For uniform nanostructures a smooth transition from quantum scaling…
Materials handling pallets were developed using wood filler-recycled polypropylene (WF-RPP) composite in our previous work. An important stage in the development of the full-size pallet is the assembly of the various components that make up the pallet. The objective of this work is to find a suitable fastening method,…