Materials Literature
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We have experimentally fabricated Ge-nanocrystals (ncs) metal-oxide-semiconductor field-effect transistors (MOSFETs) with significant capacitance–voltage hysteresis window, threshold voltage shift and good retention. The Ge-ncs/SiO 2 system has a good charge storage capability with a charge loss of 12.5% after 10 year…
Abstract The catalytic partial oxidation (CPO) of C 1 through C 16 normal alkanes is examined on Pt and Rh‐coated α‐Al 2 O 3 ceramic foam supports. New data for heavy liquid fuels (≥ C 6 ) are combined with previously reported data for lighter hydrocarbons to explore the effects of reactant fuel molecular weight, cata…
We have investigated the stability of various hydrogenated single-walled carbon nanotubes. We find that the storage capacity of hydrogen depends significantly on the diameters of carbon nanotubes. Full hydrogen coverage can be reached for nanotubes with small size, while for nanotubes with large size, the saturation c…
Effective pair potentials v ( r ) between hard-sphere colloids and the centers of mass of self-avoiding polymer coils are determined in the low-density limit by Monte Carlo sampling of polymer conformations, over a wide range of size ratios λ = R c / R g, where R c and R g are the colloid and polymer radii. In the pro…
Implantable, biocompatible and biodegradable devices bearing an anticancer drug can provide promising local therapy to patients with malignant disorders. With the aim of treating brain tumors, especially gliomas, a membranous sheet containing doxorubicin was produced by co-polymerization to poly(D,L-lactide-co-glycoli…
A high-pressure technique is introduced which allows a continuous variation of the inclusion size in liquid crystal colloids. We use a nematic liquid crystal host into which micrometer-sized gas bubbles are injected. By applying hydrostatic pressures, the diameter of these gas bubbles can be continuously decreased via…
The crystal structure of La 2 SiO 5 was refined from laboratory X-ray powder diffraction data (CuK α 1 ) using the Rietveld method. The crystal structure is monoclinic (space group P 2 1 ∕ c , Z =4) with lattice dimensions a =0.93320(2) nm, b =0.75088(1) nm, c =0.70332(1) nm, β =108.679(1)°, and V =0.46687(1) nm 3 . T…
Abstract Hydrophobic organic montmorillonite (OMMT) which exists as stable dispersions in cyclohexane has been prepared by the combined modification of quaternary ammonium salts and coupling agents, and polybutadiene (PB)/OMMT nanocomposites (NCs) were successfully synthesized by in situ living anionic polymerization.…
One of the primary objectives in the design of protein inhibitors is to shape the three-dimensional structures of small molecules to be complementary to the binding site of a target protein. In the course of our efforts to discover potent inhibitors of Bcl-2 family proteins, we found a unique folded conformation adopt…
Weak depletion gels with particle radii of ∼200–500 nm have been reported to display a time-dependent settling behaviour where an initially space spanning gel displays a catastrophic collapse after a characteristic period of time, defined as the delay time. Several experiments suggest that thermally activated particle…
To know the accurate relationship between pore size and the pressure of capillary condensation or evaporation and also to elucidate the pore-connectivity effects on adsorption hysteresis and pore criticality for the ordered mesoporous silicas (MCM-48 and KIT-6) with bicontinuous gyroid structure, we carried out X-ray…
Rigidity transitions that separate elastic phases in glasses are studied in the case where the local structure is not fully determined from the macroscopic concentration. It is shown that the location of the rigidity transitions, and the intermediate phase that separates flexible from stressed rigid glasses, depend cr…
Nano-Ce 0.73 Ti 0.25 Pd 0.02 O 2- δ solid solution, prepared by solution combustion method, has been synthesized. The catalyst has been characterized by XRD, HRTEM and XPS. Synergistic interaction of Pd with Ti/Ce is very strong because of ionic substitution. The reducibility of Ce 0.73 Ti 0.25 Pd 0.02 O 2- δ is about…
The atomic structure and thermodynamic stability of $\mathrm{Ag}(111)(\sqrt{7}\ifmmode\times\else\texttimes\fi{}\sqrt{7})\mathrm{\text{\ensuremath{-}}}R19.1\ifmmode^\circ\else\textdegree\fi{}\mathrm{\text{\ensuremath{-}}}{\mathrm{CH}}_{3}\mathrm{S}$ has been studied by means of density functional calculations and atom…
The thermal properties of single-crystalline Bi nanowire arrays with different orientations and diameters were studied by differential scanning calorimeter and in situ high-temperature X-ray diffraction. Bi nanowires were fabricated by a pulsed electrodeposition technique within the porous anodic alumina membrane. The…
Polarized Raman spectra of isotope substituted $\mathrm{Sr}{\mathrm{Ti}}^{18}{\mathrm{O}}_{3}$ (STO18) crystals were studied in the ferroelectric phase below ${T}_{c}=24.5\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. Samples were confirmed to be a single domain in the tetragonal phase $({T}_{c}<T<{T}_{0}=108\phantom{\…
The growth dynamics of fluorescent perylene nanocrystals, which are fabricated by the reprecipitation method, was investigated using in situ and ex situ single-particle fluorescence measurements. A red shift in the emission maxima as the aging time increased was observed by single-particle fluorescence spectral measur…
Nanoparticles have been extensively studied as drug delivery systems. In this review, we focus on a relatively new type of nanoparticles--lipobeads--a liposome-hydrogel assembly as a novel drug delivery system. An appropriate assemblage of spherical hydrogel particles and liposomes combines the properties of both clas…
Reaction of K(10)[alpha(2)-P(2)W(17)O(61)] or K(10)[alpha(1)-P(2)W(17)O(61)] or [Bu(4)N][OsCl(4)N] in a water/methanol mixture, and subsequent precipitation with (Bu(4)N)Br provided [alpha(2)-P(2)W(17)O(61){Os(VI)N}](7-) and [alpha(1)-P(2)W(17)O(61){Os(VI)N}](7-) Dawson structures as tetrabutylammonium salts. Reaction…
This paper describes the preparation of model nanocomposites based on geometrically well-defined particles (laponite) dispersed into a PEO matrix of narrow molecular weight distribution. The preparation involves the protection of the laponite particles with an adsorbed or a grafted layer of PEO chains. The adsorption…