Materials Literature
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Single oxides of titania, silica, alumina, and zirconia were synthesized by the sol−gel method, using a temperature treatment before hydrolysis. Binary and ternary oxides of titania−alumina, titania−silica, titania−zirconia, titania−zirconia−alumina, and titania−zirconia−silica were similarly prepared. The synthesized…
AIMS: To develop an efficient approach using a combination of phenotypic and genotypic methods for isolation of environmental bacteria that produce mid-chain-length polyhydroxyalkanoates (mcl-PHAs). METHODS AND RESULTS: A viable-colony staining method using Nile red was used to screen for PHA-producing bacteria follow…
Dinuclear [(TPyA)FeII(DBQ2-)FeII(TPyA)](BF4)2 possesses extensive pi-pi interactions between the FeII dimers that give rise to a two-dimensional supramolecular sheet structure. The magnetic susceptibility shows a room-temperature spin-crossover behavior; however, thermal hysteresis is not observed.
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The optical switching from shiny metallic to “black” absorbing states of 30 nm Mg 2 Ni/50 nm TM/10 nm Pd (TM = Ti, V, Cr, Mn, Fe, Co, Ni, Pd) trilayer thin films upon hydrogenation is used to determine the hydrogen absorption/desorption kinetics at moderate H 2 pressure and room temperature. A strong correlation is ob…
Co(2.5)Mg(0.5)/Al1 and Co(2.5)Mg(0.5)/X(0.5)Al(0.5) hydrotalcite-like compounds (where X = Fe, Mn, Zr, La) were synthesized by a constant-pH coprecipitation. The derived oxides from hydrotalcites upon calcination at 800 degrees C for 4 h in static air are mainly of spinel phase, with a surface area of 14.2-23.8 m2/g,…
Labeled silica beads with an average diameter of 100 nm were synthesized by incorporating with 20-600 μM Ru(bpy)(3) (2+) complexes. Silver shells were deposited on the beads layer-by-layer with the shell thickness of 5-50 nm. The emission band became narrower and the intensity was enhanced depending on the shell thick…
The use of self-assembled polymer structures to direct the formation of mesoscopic (1-100 nm) features on silicon could provide a fabrication-compatible means to produce nanoscale patterns, supplementing conventional lithographic techniques. Here we demonstrate nanoscale etching of silicon, applying standard aqueous-b…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTExistence of fcc-Packed Spherical Micelles in Diblock Copolymer MeltYen-Yu Huang, Jen-Yung Hsu, Hsin-Lung Chen, and Takeji HashimotoView Author Information Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu…
Mineralization and crystallization of barium carbonate mesocrystals with various shapes and complex form using double hydrophilic block copolymers (DHBCs) as crystal growth modifiers in a mixed solvent composed of N, N -dimethylformamide (DMF) and deionized water (DIW) have been systematically investigated. The effect…
Novel photoswitchable chiral hosts having an axis chiral 2,2'-dihydroxy-1,1'-binaphthyl (BINOL)-appended stiff-stilbene, trans-(R,R)- and -(S,S)-1, were synthesized by palladium-catalyzed Suzuki-Miyaura coupling and low-valence titanium-catalyzed McMurry coupling as key steps, and they were fully characterized by vari…
The first divalent ytterbium complex supported by a diaminobis(phenolate) ligand, YbL(THF)2.0.5C7H8 (1; THF = tetrahydrofuran), was synthesized in good yield by the amine elimination reaction of Yb[N(SiMe3)2]2(THF)2 with H2L (L = [Me2NCH2CH2N(CH2-2-OC6H2-3,5-But2)2]) in a 1:1 molar ratio. X-ray structural determinatio…
A self-assembled spherical-like basic magnesium carbonate (Mg 5 (CO 3 ) 4 (OH) 2 ·4H 2 O) with diameters of 15−17 μm was synthesized in an aqueous solution system without using any organic additives during the precipitation process. Reaction parameters such as reaction time, stirring time, and reaction temperature wer…
Hierarchical superstructures of lead chalcogenides (PbS, PbSe, and PbTe) have been fabricated in large scale via microwave-assistant method. The FESEM and HRTEM images showed that dendritic and six-armed PbS superstructures were constructed with prism-shaped branches which grew epitaxially from the backbone of PbS. De…
The two-dimensional (2D) phases of fatty-acid monolayers (hexadecanoic, octadecanoic, eicosanoic, and docosanoic acids) have been studied at the interface of a nematic liquid crystal (LC) and water. When observed between crossed polarizers, the LC responds to monolayer structure owing to mesoscopic alignment of the LC…
This study reports an approach for synthesis of graphitic carbon nanocages (CNCs) via pyrolysis of ethanol with dissolved iron carbonyl at temperatures from 600 to 900 °C. The in situ formed Fe catalyst and template enabled the in situ generation of carbon from ethanol and formation of graphitic layers on the template…
Gold nanoparticles capped with 11-mercaptoundecanylphosphonic acid (MUP) and sodium 10-mercaptodecanesulfonic acid (MDS) were characterized by a range of techniques which included solid-state 31P and 13C NMR spectroscopies. Despite similar core sizes and alkyl chain lengths, the conformational and dynamic properties o…
A trivalent chromium based conversion coating (CCC), based on chromium nitrate solution with Co(II) ions, was developed on Zn substrate. The corrosion resistance of the trivalent CCC, measured in deaerated pH 8.0 borate buffer + 0.01 M NaCl solution using anodic polarization and electrochemical impedance spectroscopy…
Topological polymer networks with sliding cross-link points, the “sliding gels” (also called slide-ring gels), are a new class of supramolecular networks based on intermolecularly cross-linked α-cyclodextrins/poly(ethylene glycol) polyrotaxane precursors. The cross-link points of such networks are not fixed but can sl…
This paper reports recent progress in the patterning of non‐linear optical crystals on the glass surface by laser irradiation. Two techniques for the writing of crystal lines have been developed, i.e., rare‐earth (samarium) atom heat processing and transition metal atom heat processing, in which a continuous wave Nd:Y…