Materials Literature
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The solubilities of rutin in ethanol + water were measured by using high-performance liquid chromatography (HPLC) in the temperature range from (273.15 to 323.15) K. The experimental data were correlated with a three-parameter equation. Four crystal forms of rutin obtained in different compositions of ethanol + water…
We investigate the defect structures and the potentials of mean force (PMF) that arise when faceted nanoparticles, namely cubes and triangular prisms, are immersed in a nematic liquid crystal (NLC). Using a mesoscale theory for the tensor order parameter Q of the nematic, we have determined the thermodynamic stability…
The ZnO nanorods on ZnO/Si substrates were synthesized by using the low temperature growth aqueous solution method. The chemical and plasma etching treatments were carried out on the as-grown ZnO nanorods to provide the nanorods with various tip angles. The crystal structure and morphology of the ZnO nanorods were exa…
Quinuclidine grafted cationic bile salts are forming salted hydrogels. An extensive investigation of the effect of the electrolyte and counterions on the gelation has been envisaged. The special interest of the quinuclidine grafted bile salt is due to its broader experimental range of gelation to study the effect of e…
Abstract The FT‐IR and Raman spectra of Martius Yellow sodium salt Monohydrate (MYM) [2, 4‐dinitro‐1‐naphthol sodium salt] in solid‐phase have been measured. The geometry, intramolecular hydrogen bonding and harmonic vibrational wavenumbers of MYM have been investigated with the help of B3LYP density functional theory…
Helicobacter pylori gamma-glutamyltranspeptidase (HpGT) is a general gamma-glutamyl hydrolase and a demonstrated virulence factor. The enzyme confers a growth advantage to the bacterium, providing essential amino acid precursors by initiating the degradation of extracellular glutathione and glutamine. HpGT is a member…
Abstract Results from a study conducted between National Metrology Institutes (NMIs) for the measurements of the absolute thicknesses of ultra‐thin layers of SiO 2 on Si are reported. These results are from a key comparison and associated pilot study under the auspices of the Consultative Committee for Amount of Subst…
Utilizing a combinatorial method, we used spectroscopic ellipsometry to determine the dielectric functions of silver island films over a large range of sizes and morphologies from the percolation threshold down to average particle size smaller than 5 nm. We measured films on silicon substrates with 2 and 20 nm oxide l…
The literature of CO oxidation catalyzed by supported gold is extensive, but reports of the kinetics of the reaction are incomplete and fragmented. This paper is a summary of such information presented in tables that state (1) how the catalysts were made, treated, and tested; (2) their physical properties, such as the…
Abstract Transmission electron microscopy (TEM) characterization of nickel contacts to bulk bismuth tellurium selenide [Bi 2 (Te,Se) 3 ] is reported. Samples were prepared in a dual column focused ion beam/scanning electron microscope (FIB/SEM) system using a lift‐out technique, with ion beam energy and exposure times…
Ketalization of the biomolecule progesterone with (6-bromo-7-hydroxycoumarin-4-yl)ethane-1,2-diol gives the photolabile progesterone derivatives 3 and 4. These compounds display dramatically reduced bioactivity and release progesterone upon irradiation with UV/vis or IR light. In particular, 4 can be used to perform c…
Crystalline aromatic poly(ether ketone)s such as PEEK and PEK may be cleanly and reversibly derivatized by dithioketalization of the carbonyl groups with 1,2-ethanedithiol or 1,3-propanedithiol under strong acid conditions. The resulting 1,3-dithiolane and 1,3-dithiane polymers are hydrolytically stable, amorphous, an…
Mesoporous ZnO (m-ZnO) was successfully synthesized by a supermolecule-templeting approach under hydrothermal conditions, in which triblock co-polymer Pluronic (F-127) was introduced as a template reagent. The corresponding Pd/m-ZnO catalyst was prepared using the deposition−precipitation method, and its catalytic per…
The smallest maximum-kissing-number Voronoi polyhedron of three-dimensional (3D) Euclidean spheres is the icosahedron, and the tetrahedron is the smallest volume that can show up in Delaunay tessellation. No periodic lattice is consistent with either, and hence these dense packings are geometrically frustrated. Becaus…
A photoresponsive nanocarrier for amines based on gold nanoparticles (GNPs) having a photocleavable succinimidyl ester has been developed. It offers a useful platform for the synthesis of caged compounds. Using the GNPs, we have developed caged histamine for the first time and applied it to evoke intracellular signali…
We study the velocity autocorrelation function of a driven granular fluid in the stationary state in three dimensions. As the critical volume fraction of the glass transition in the corresponding elastic system is approached, we observe pronounced cage effects in the velocity autocorrelation function as well as a stro…
The controlled grafting density of poly(tert-butyl acrylate) was studied on OH-activated mica substrates via surface-initiated atom-transfer radical polymerization (ATRP). By properly adjusting parameters such as the immobilization reaction time and the concentration of an ATRP initiator, a wide range of initiator sur…
Nanowires with twinned morphology have been observed in many cubic-phase materials including spinel. We study systematically the formation of multitwinned Zn(2)TiO(4) nanowires based on a solid-solid reaction of ZnO nanowires with a conformal shell of TiO(2), which is deposited by atomic layer deposition (ALD). By var…
Doping Li atom into higher flexible cyclic polyamines with many amine unit petals (ethyleneimine) forms the n-petal-shaped Li-doped cyclic polyamines (n = 3-5). Three structures, referred to as three-petal-shaped Li-[9]aneN(3), four-petal-shaped Li-[12]aneN(4), and five-petal-shaped Li-[15]aneN(5), with all-real frequ…
We study the strain-induced shift of the D* Raman band of single-wall carbon nanotubes in polyvinyl alcohol−nanotube composite fibers. If embedded in structural components, such strain-sensitive fibers may be considered for potential applications as strain or stress sensors. Due to improved interfacial adhesion, stron…