Materials Literature
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The system of Na2WO4–HNO3–KNO3–H2O was investigated by means of single-point pH-potentiometric titration, and subsequent mathematical modeling of the equilibrium processes revealed that hydroheptatungstate anion HW7 transforms into protonated forms of paratungstate B anion H x W12O40 . The mathematical modeling data w…
Abstract Meshy boron nitride (BN) was synthesized by the reaction of NaBH 4 and CS(NH 2 ) 2 at 550 °C for 10 h. X‐ray diffraction indicates the formation of hexagonal boron nitride (h‐BN) with lattice constants a = 2.501 and c = 6.724 Å. Observations by TEM show that the BN obtained has a meshy structure with a quanti…
Extracting underlying reaction kinetics is a high-value endeavor, as this fundamental knowledge can be applied for the prediction of deposition rates under new processing conditions and to the rational and quantitative optimization of processes in reactors having different geometries. Additionally, interpreting kineti…
Abstract The synthesis of complexes [Ag 2 X] [X = O 2 CCO 2 ( 3a ), C 4 O 4 ( 3b ), O 2 CCH 2 CO 2 ( 3c ), O 2 C(CH 2 ) 2 CO 2 ( 3d ), cis ‐O 2 CCH=CHCO 2 ( 3e ), trans ‐O 2 CCH=CHCO 2 ( 3f ), para ‐O 2 CC 6 H 4 CO 2 ( 3g )] and [(R 3 P) m AgXAg(PR 3 ) m ] [R = Ph, X = C 4 O 4 , m = 2 ( 10a ), m = 3 ( 10b ); R = n Bu,…
A new program to perform fast sequential and parametric whole powder profile refinement of in situ time-resolved powder diffraction data is presented. The program interacts with the launch mode kernel of the total powder pattern analysis software suite Topas® for doing the refinements. The program provides a graphical…
The demand for high precision optical elements as micro lens arrays for displays increases continually. Economic mass production of such optical elements is done by replication with high precision optical molds. A new approach for manufacturing such molds was realized by diamond machinable and wear resistant sol-gel c…
The first order phase transition of CsFeO2 was investigated using synchrotron powder diffraction data as a function of temperature. Two alternative approaches were used to describe the deviation of the framework crystal structure relative to the high-symmetry parent structure: symmetry (a.k.a. distortion) modes and po…
Room-temperature (RT) coalescence of double-walled carbon nanotubes has been observed for the first time. A combined pre-treatment of localized electron irradiation, Joule heating, and electromigration leads to the formation of large vacancy clusters, which can survive for tens of seconds during surface reconstruction…
Abstract The influence of organically modified montmorillonate (OMMT) on the curing reversion of natural rubber (NR) and polychloroprene rubber (CR) blend has been demonstrated in this article. Characteristics of the NR/CR/OMMT hybrid composite were undertaken by combining the cure kinetics, thermal stability, and the…
Both rat derived vascular smooth muscle cells (SMC) and human myofibroblasts contain α smooth muscle actin (SMA), but they utilize different mechanisms to contract populated collagen lattices (PCLs). The difference is in how the cells generate the force that contracts the lattices. Human dermal fibroblasts transform i…
In this study, {[Cu2(µ-HCO2)4](µ-Mepyrz)} n (1), [Cu2(µ-HCO2)4(Mepyrz)2] (2), {[Cu2(µ-AcO)4](µ-Mepyrz)} n (3), [Cu2(µ-AcO)4(Mepyrz)2] (4), [Cu2(µ-AcO)4(2,3-Me2pyrz)2] (5), [Cu2(µ-AcO)4(2,6-Me2pyrz)2] (6), and {[Cu2(µ-AcO)4](µ-2,5-Me2pyrz)} n (7) have been synthesized and characterized by chemical analysis and electron…
Current methods for the synthesis of single-walled nanotubes (SWNTs) produce mixtures of semiconducting (sem-) and metallic (met-) nanotubes. Most approaches to the chemical separation of sem-/met-SWNTs are based on small neutral molecules or conjugated aromatic polymers, which characteristically have low separation/d…
Abstract Polyacrylamide was photografted on solution‐cast poly(3‐hydroxybutyric acid‐ co ‐3‐hydroxyvaleric acid) (PHBV) films (amide‐PHBV), on which amide groups were transformed into amine groups through Hofmann degradation reaction (amine‐PHBV), followed by collagen coupling reaction to prepare collagen‐modified PHB…
Abstract Nanocomposites of isotactic polypropylene (iPP) and multiwalled carbon nanotubes (MWCNTs) with various contents of MWCNTs were fabricated by double molding techniques. X‐ray diffraction measurements reveal a development of α‐crystal with lamellar stacks having a long period of 150 Å in the neat iPP that incre…
Failure mechanism of a multilayer ceramic capacitor (MLCC) made of a low‐fire BaNd 2 Ti 4 O 12 (BNT)+ZnO–B 2 O 3 (ZB) dielectric with an inner pure silver electrode at elevated temperatures and voltages has been investigated. A nonlinear current–voltage leakage characteristic is found when the degradation of MLCC occu…
A reaction between nickel(II) sulfate and hydrazine in aqueous solution yields blue crystals of [Ni(6)(N(2)H(4))(6)(SO(4))(4)(OH)(2)(H(2)O)(8)](SO(4))(H(2)O)(10). The compound has been characterized by single-crystal and powder X-ray diffraction, vibrational spectroscopy, as well as variable-temperature magnetic susce…
Abstract A bioflocculant, quaternized carboxymethyl chitosan (QCMC), was developed by the quaternization of N,O‐carboxymethyl chitosan (N,O‐CMC) and characterized by FTIR, 1 H‐NMR, GPC, and potentiometry. The efficiency of the removal of chemical oxygen demand (COD) in printing wastewater by this flocculant was furthe…
We report a study of localized surface plasmon resonance (LSPR) in single Au nanowires (NWs) created by atomic force microscopy nanolithography with widths and thicknesses of less than 110 and 30 nm, respectively, and lengths of a few micrometers. Two LSPR peaks at around 630 and 490 nm in wavelength are observed, and…
Ternary Cu/ZnO/<TEX>$Al_2O_3$</TEX> catalysts were prepared by a co-precipitation method. The precursor structures were monitored during the aging. The first precipitate structure was amorphous georgeite, which transformed into the unknown crystalline structure. The transition crystalline structure was assigned to the…
Abstract Polyaniline micro‐ or nanostructures have been widely investigated due to their unique physical and chemical properties. Although several studies have reported the synthesis of polyaniline microspheres and nanotubes, their mechanisms of formation remain controversial. This study reports our observation of the…