Materials Literature
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We have measured potentiometric titration curves of the weak polyelectrolytes, PAH 1 and PAA, interpolyelectrolyte complexes PAH−PAA, PDADMAC−PAA, and PAH−PAA, prepared by mixing of the polyelectrolyte solutions, and multilayered microcapsules made by layer-by-layer adsorption of the same pairs of oppositely charged p…
Single-crystalline perovskite nanostructures with reproducible shape have been prepared using a simple, readily scaleable solid-state reaction in the presence of NaCl and a nonionic surfactant. Pristine BaTiO3 nanowires have diameters ranging from 50 to 80 nm with an aspect ratio larger than 25. Single-crystalline SrT…
Time-resolved second-harmonic generation (TRSHG) and transient photoluminescence (PL) spectroscopy are utilized to probe the ultrafast creation and subsequent relaxation of excited carriers immediately following band-gap excitation in single ZnO nanowire and nanoribbon lasers. The TRSHG signal consists of a 1−5 ps rec…
A simple hydrothermal method has been developed for the systematic synthesis of lanthanide orthophosphate crystals with different crystalline phases and morphologies. It has been shown that pure LnPO(4) compounds change structure with decreasing Ln ionic radius: i.e., the orthophosphates from Ho to Lu as well as Y exi…
The surfactant-mediated shape evolution of titanium dioxide anatase nanocrystals in nonaqueous media was studied. The shape evolves from bullet and diamond structures to rods and branched rods. The modulation of surface energies of the different crystallographic faces through the use of a surface selective surfactant…
As an efficient nanolens, we propose a self-similar linear chain of several metal nanospheres with progressively decreasing sizes and separations. To describe such systems, we develop the multipole spectral expansion method. Optically excited, such a nanolens develops the nanofocus ("hottest spot") in the gap between…
Zehnmal schnellere Umsetzungen von Ethylbenzol (EB) zu Styrol über unpromotierten Hämatitkatalysatoren sind möglich, wenn die Reduktion zu Magnetit und die Verkokung durch Zugabe von Sauerstoff verhindert werden. Dies ergeben Messungen mit dem skizzierten Prallplatten-Mikroflussreaktor (1: Modellkatalysator, 2: Versch…
The depletion interaction between two and three big hard spheres in a small hard sphere fluid with volume fraction π/10 is calculated both from Monte Carlo simulations and the Asakura–Oosawa approximation. The Monte Carlo results are in good agreement with previous DFT results. The three-body interaction at this volum…
This work exploits the localized surface plasmon resonance (LSPR) spectroscopy of noble metal nanoparticles to achieve sensitive and selective detection of biological analytes. Noble metal nanoparticles exhibit an LSPR that is strongly dependent on their size, shape, material, and the local dielectric environment. The…
This work discusses an issue caused by omitting the fourth-order zero-field splitting (ZFS) terms in the analysis of random-orientation EPR spectra. Eu(II)-doped strontium aluminates were employed as a model system of the S-state lanthanoid ions, which have relatively large second-rank ZFS components, comparable to th…
This paper studies the nanojet ejection process by spreading droplets on a solid surface using molecular dynamics simulation based on the Lennard-Jones potential. During the simulation, it was found that the spreading width increased as the aperture dimensions and time increased. An energy wave phenomenon was also fou…
A systematic investigation of magnetic and transport properties is carried out for ${\mathrm{La}}_{2/3}{\mathrm{Ca}}_{1/3}{\mathrm{MnO}}_{3}$ granular system. Based on the magnetization measurement, it is argued that oscillatory indirect magnetic exchange coupling via the boundary material with thickness s sandwiched…
The radical oxygen can be generated in the lattice of the new aluminum silicate, Ca12Al14-xSixO33+0.5x, with different Al/Si ratios. The three-dimensional structure of Ca12Al14-xSixO33+0.5x yields positively charged tetrahedral frameworks having molecular size pores occupied by charge-balancing dioxygen species such a…
The relative distribution of rare-earth ions R 3+ (Dy 3+ or Ho 3+ ) in the phosphate glass RAl 0.30 P 3.05 O 9.62 was measured by employing the method of isomorphic substitution in neutron diffraction and, by taking the role of Al into explicit account, a self-consistent model of the glass structure was developed. The…
Monodispersed spherical polycrystalline cadmium sulfide particles were synthesized by precipitation in acidic aqueous solutions during the thermally controlled reaction between cadmium nitrate and thioacetamide. The effects of the concentration of the components and of the nitric acid on the colloidal growth dynamics…
Novel pyridine-based nitronyl nitroxide (NIT) biradicals, 3,5-bis[4-(1-oxyl-3-oxo-4,4,5,5-tetramethylimidazolin-2-yl)phenylethynyl)]pyridine (1) and 2,6-bis[4-(1-oxyl-3-oxo-4,4,5,5-tetramethylimidazolin-2-yl)phenylethynyl)]pyridine (2), and monoradicals, 4-(5-bromopyridine-3-ylethynyl)-1-(1-oxyl-3-oxo-4,4,5,5-tetramet…
Abstract A photopolymerization process at room temperature was devised to copolymerize vinyl acetate (VAc) and n‐butyl acrylate (BA) mainly to prepare rubber‐like damping sheet bearing pressure‐sensitive adhesive property in this study. The investigations using both the differential scanning calorimeter and rheometric…
Abstract Polycarbonate (PC)/acrylonitrile–butadiene–styrene (ABS) polymer alloy/montmorillonite (MMT) and nylon 6 (PA6)/ABS polymer alloy/MMT nanocomposites were prepared using the direct melt intercalation technique. Their structures were characterized by XRD and TEM. The results of TEM show that the silicate layers…
The transport of weak acid/base molecules through ultrathin films of polyelectrolyte complex formed by the multilayering method was measured by electrochemical means. The net flux of probe molecule through multilayers is a linear combination of all forms in which that probe is found. Neutral molecules are able to trav…
For the first time, an organic dye, morin, and another bio-macromolecule, human serum albumen (HSA), were embedded in porous alumina (P-Al) fabricated by anodization in oxalic acid. The photoluminescent (PL) spectra of morin and morin-HSA immersed in the P-Al pores were measured and compared with those of liquid solut…