Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Organic−inorganic UV-curing of organosilanes containing epoxy and trialkoxysilyl functional groups in the same monomer was implemented using a diaryl iodonium salt as cationic photoinitiator. UV-generated Brönsted acids through photolytic degradation were found to be effective in catalyzing both epoxy ring-opening pol…
We report detailed measurements of the low temperature magnetic phase diagram of Er2Ti2O7. Heat capacity and time-of-flight neutron scattering studies of single crystals reveal unconventional low-energy states. Er3+ magnetic ions reside on a pyrochlore lattice in Er2Ti2O7, where local XY anisotropy and antiferromagnet…
Using recent advances in auxiliary-field quantum Monte Carlo techniques and the phaseless approximation to control the sign/phase problem, we determine the equation of state in the ground state of the two-dimensional repulsive single-band Hubbard model at intermediate interactions. Shell effects are eliminated and fin…
Cryo-Fixation Methods. Macromolecular Assemblies. Cryo-ultramicrotomy. Low-Temperature Embedding. Freeze-Fracture and Metal Shadowing. Immunolabeling, Electron Tomography.
We study emulsification of paraffin oil in aqueous solutions of chitosan without adding any other surfactant. By monitoring the surface tension of the water-paraffin interface, we show that chitosan itself has only a weak surface activity. Nevertheless, chitosan dissolved in the aqueous phase allows the dispersion of…
The properties of nanoconfined and interfacial water in the proximity of hydrophobic surfaces play a pivotal role in a variety of important phenomena such as protein folding. Water inside single-walled carbon nanotubes (SWNTs) can provide an ideal system for investigating such nanoconfined interfacial water on hydroph…
Potassium hexaniobate nanoscrolls (NS-K 4 Nb 6 O 17 ) formed by exfoliation of lamellar K 4 Nb 6 O 17 were studied as building blocks for visible-light-driven H 2 production (λ > 420 nm) from water using tris(2,2′-bipyridyl)ruthenium(II) chloride (Ru(bpy) 3 2+ ) as a sensitizer and ethylenediaminetetraacetic acid (EDT…
A Monte Carlo simulation of the metal flux from a small scale rotating cylindrical magnetron is presented. The model describes the sputtered particles trajectories through the gas in a user definable 3D set-up. The ejection positions of the sputtered particles are generated according to the simulated ion current densi…
A series of coumarin dyes (NKX-2593, NKX-2807, and NKX-2883) with one or two -CN groups as electron acceptors were synthesized and applied as dye sensitizers for dye-sensitized solar cells. Compared with the dye containing one -CN group, linking one more -CN group to the π-conjugation bridge positively shifts the lowe…
Summing Me up: DFT calculations have shown that alloying, subsurface carbon, and hydride formation, all increase the selectivity of Pd catalysts for acetylene hydrogenation by weakening the surface–adsorbate bond. A simple descriptor—the adsorption energy of a methyl group—has been used to quantify and compare the dif…
A rhodamine-cyclen conjugate (1) behaves as a highly sensitive and selective fluorescent chemosensor for Hg(2+). The high emission selectivity is due to the formation of 1-Hg(2+) 1:2 complex leading to spirocycle opening of 1.
Butenes and butadiene, which are useful intermediates for the synthesis of polymers and other compounds, are synthesized traditionally by oxidative dehydrogenation (ODH) of n-butane over complex metal oxides. Such catalysts require high O2/butane ratios to maintain the activity, which leads to unwanted product oxidati…
Experimental results have shown that the kinetics of bond formation in chemical cross-linking of gelatin solutions are strongly affected not only by gelatin and reactant concentrations but also by the solution pH. We present an extended numerical investigation of the phase diagram and of the kinetics of bond formation…
A simple model featuring a double well potential is used to represent a liquid that is quenched from an ergodic state into a history-dependent glassy state. Issues surrounding the application of the Jarzynski equality to glass formation are investigated. We demonstrate that the Jarzynski equality gives the free energy…
Composites of polypropylene and green coconut fiber were prepared in an extruder with temperatures of 140°C in the first zone and 170°C in the other five zones. The screw speed varied from 60 to 140 rpm. Two fiber granulometries were used, X (0,500–0,250 mm) and Y (0,841–0,500 mm). The homogeneity and the effect of th…
The synthesis and photochemical study of 3-acetyl-2(2'-furyl)chromone derivatives are described, which are of interest for the creation of photo-induced irreversible luminescent media for one-time superdense recording on a multilayer carrier.New thiophene-containing 3-acetyl-2(2'-furyl)chromone derivatives are prepare…
Nickel film deposited on a (1 0 0) oriented silicon substrate was prepared at 110 °C by a simple chemical method under the application of a 0.3 T magnetic field. The prepared film possesses a shiny-silver surface and a strong binding ability develops between the film and the silicon surface. FESEM images show that the…
The rates of Z-E isomerization of azobenzene and seven 4-substituted derivatives (CH3, CF3, OCH3, n-Butyl, Ot-Butyl, Br, F) have been investigated at 25 °C in ethanol, in methanol, in methanol/water mixtures and in aqueous solutions of ionic and non-ionic micelles by recording in the dark the spectral changes observed…
A series of zirconium titanium oxide mesophases containing 33 atom % Zr have been prepared using carboxylic acids of different alkyl chain lengths (Cy ) from y=4-18 through organic-inorganic polymer phase segregation as the gel transition is approached. Thermal treatment of these transparent gels up to 450 degrees C e…
Radiation-induced graft copolymerization of vinyl acetate (VAc) onto poly(3-hydroxybutyrate) (PHB) was performed to improve the polymer hydrophilicity. The grafting reaction was carried out by the simultaneous irradiation technique with 60Co γ-ray. The grafting degree (W), composition (C), and grafting index (γg) were…