Materials Literature
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Production of atomic photochemical hydrogen under the action of light and its subsequent injection into transition metal oxides has yielded numerous interesting results. Here we report on the mechanism of the photo-induced hydrogen transfer between adsorbed organic molecules and the surface of highly disordered V(2)O(…
Controlling nanostructural morphologies has been the subject of intensive research as nanostructures can display significantly different bioactivities depending on their physicochemical parameters. Toroidal proteins perform numerous important functions in biological systems. Recent studies show that toroidal nanostruc…
Nephrogenic systemic fibrosis (NSF) was first described in 2000 as a scleromyxedema-like illness in patients on chronic hemodialysis. The relationship between NSF and gadolinium contrast during magnetic resonance imaging was postulated in 2006, and subsequently, virtually all published cases of NSF have had documented…
Hemoglobin (Hb) is immobilized within the channels of mesoporous TiO2–SiO2 materials. It was found that mesoporous TiO2–SiO2 material can immobilize more Hb than mesoporous SiO2 and the greatest loading is achieved on the sample with an optimized Ti/Si molar ratio of 4 : 6. The high loading of Hb in mesoporous TiO2–Si…
In our previous paper (Kanagawa et al., J. Fluid Sci. Tech., 5, 2010), we have proposed a systematic method for derivation of various types of nonlinear wave equations for plane waves in bubbly liquids. The method makes use of an asymptotic expansion with multiple scales in terms of a small wave amplitude as an expans…
We investigate the behavior of coarse particles confined in foam channels during drainage. Results are reported for particle velocities measured at both microscopic (single foam channel) and macroscopic (foam) scales, as a function of the average velocity of the liquid flow and of the confinement parameter that is the…
Compounds 1a–j, 4-alkoxy-4′-pentafluorobenzoyloxybiphenyls, were synthesized to investigate the biaxiality in the smectic A phases of rod-like molecules possessing both perfluorinated and non-fluorinated benzene rings. The phase behaviors of the compounds and the molecular packing structures of their smectic A phases…
As semifluorinated alkanes (SFA) present an unusual class of mesogenic units for supramolecular structure formation, the study of their physical properties and self-assembly at fluid interfaces is of substantial relevance. To this end, the two-dimensional phase behavior and the viscoelastic properties of semifluorinat…
Wedge-shaped amphiphilic derivatives of 1,3-dipyrrolyl-1,3-propanedione boron complexes, with one or no aliphatic chains attached at one aryl moiety and three hydrophilic chains at the other, exhibited formation of assembled structures in aqueous solutions. UV/vis, fluorescence and DLS analyses suggested that the wedg…
Silica core-shell nanoparticles with a MSU shell have been synthesized using several non-ionic poly(ethylene oxide) based surfactants via a two step sol-gel method. The materials exhibit a typical worm-hole pore structure and tunable pore diameters between 2.4 nm and 5.8 nm.
By varying the vapor pressure of solvents through changing the alkyl length of aliphatic alcohols or the aging temperature, the microstructures, including mesopore ordering length, porosity, and specific surface area, of silica templates are controllable in an evaporation-induced self-assembly (EISA) process. The micr…
Creep rupture data of base metal and welded joints of several creep strength enhanced ferritic (CSEF) steels was collected and long-term creep strength of those steels was evaluated by the SHC committee in Japan. The previous allowable tensile stress of those steels regulated in METI Thermal Power Standard Code was re…
Silver–gold nanoparticles are grown inside mesostructured silica films obtained from block copolymers, using two successive steps: the first one involves silver nanoparticle growth. The second step consists of the replacement of the silver with gold. Using two commercial block copolymers, containing polyethylene oxide…
Taking the benefit of Si(HIPE) as a hard monolithic template to shape macro-mesoporous foams by using polycarbosilane as pre-ceramic precursor β-SiC, macro/mesocellular foams have been synthesized. Both macroscopic Plateau border morphology and final mechanical properties can be tuned through varying the starting amou…
We study the electron relaxation processes in nanoporous Au structures using pump-probe thermoreflectance. Using a modified two temperature model, we determine that the electron Fermi relaxation time is unaffected by the ligament size and is an athermal process that is constant with laser pulse excitation, yet the ele…
A general one-pot protocol is reported to prepare hollow or porous manganese (Mn) oxide, phosphate, sulfide nanoparticles (NPs) via a controlled ion transfer process.
Nano-composite silica-phosphate system (SiO2- P2O5) co-doped with Al2O3 as a host material and prepared by sol gel technique in two forms monolith and thin film using multilayer spin-coating method were activated by Er3+ and Yb3+ ions as in the formula;[SiO2: 11P2O5: 3 Al2O3: (1.2) Er: (1.2, 1.8 and 3) Yb]. The prepar…
Herein we describe the preparation of an efficient heterogeneous catalyst consisting of an anionic Ce(III)-complex immobilized Zn/Al-layered double hydroxide (LDH) and its use in the catalytic liquid phase oxidation of primary alcohols using molecular O(2) at room temperature. Various primary alcohols could be transfo…
Nickel nanocrystalline thin films were produced by electrodeposition using sulfamate solution. Free-standing thin films with various grain sizes ranging from 9 to 67 nm were produced under a constant current with changing the content of brightener and temperature of electrodeposition. The grain-size effect on the frac…
Dispersion of single-walled carbon nanotubes (SWNTs) with poly(pyridinium salt)s via non-covalent interactions in DMSO is demonstrated. The resulting composites display high quenching efficiency in the photoluminescent properties of this class of ionic polymers, and TEM study shows that SWNTs are wrapped by ionic poly…