Materials Literature
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This work presents the processing and the characterization of diopside–Ca‐Tschermak clinopyroxene‐based glass–ceramics (GCs), where partial (i.e., 5%, 10%, and 20%) substitution of Ba for Ca was attempted in the composition of CaMg 0.8 Al 0.4 Si 1.8 O 6 . Sintering, crystallization, microstructure, and properties of t…
A new series of dendrimers was prepared by covalently attaching a Newkome dendron, a Fréchet dendron, and a redox active, aminoferrocene group to a central triazine core. Growth of the Newkome dendron has a more pronounced effect on the half-wave potential for the one-electron oxidation of the ferrocene residue than g…
Phase equilibria of the ZrO 2 –SmO 1.5 system have been studied by X‐ray diffraction, scanning electron microscopy, and energy‐dispersive X‐ray spectroscopy. The compositions of phases in the tetragonal+fluorite, fluorite+pyrochlore, and fluorite+B‐Sm 2 O 3 two‐phase fields have been determined for samples quenched fr…
Combining the one-dimensional tight-binding Su-Schrieffer-Heeger (SSH) model and the extended Hubbard model (EHM), we investigate the effect of electron-electron interactions on the dynamics of a charged polaron in a conjugated polymer chain, by using a nonadiabatic dynamical method. Both the localization and the velo…
We have studied Co-doped indium-tin oxide (ITO) films deposited by magnetron sputtering on fused-quartz substrates under various conditions. We find that the magnetic and electrical transport properties of these films vary strongly with post-growth treatment. In films with more than $8\phantom{\rule{0.3em}{0ex}}\mathr…
Free sodium metal clusters have been studied by probing the $\mathrm{Na}\phantom{\rule{0.2em}{0ex}}2p$ core level using x-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). The development of electronic structure with size has been studied and discussed in comparison with the atom, dimer, and…
An organic aqueous solution of metal acetylacetonate precursors was subjected to spray pyrolysis in order to fabricate SrAl 2 O 4 :Eu (SAO) nanoparticles. Non‐agglomerated luminescent SAO nanoparticles, having a spherical shape with a size of 10–30 nm, were achieved in a single step, while only submicrometer‐sized SAO…
Abstract A novel approach has been explored to prepare brain‐like polyaniline (PANI) nanostructures with many convolutions (140–170 nm in average diameter) using aniline/citric acid (CA) salt as the template and chlorine gas as the oxidant by a gas/solid reaction for the first time. The method provided here differs si…
The aim of this study is the synthesis of nanoscale, nonagglomerated, and redispersible Co 3 [Co(CN) 6 ] 2 nanoparticles via a microemulsion approach. Furthermore, the micellar system is heated to reflux to enhance materials crystallinity. Crystallinity, chemical composition, and optical and thermal properties of the…
Fully stabilized zirconia containing 8 mol% yttria (8Y‐FSZ) in nanocrystalline form has been synthesized by the coprecipitation method. The formation of an easily filterable hydroxide is facilitated by the addition of ammonium sulfate and polyethylene glycol during precipitation. The precipitate is then calcined to pr…
As a part of current systematic investigations of strontium tellurite, SrTeO3, with particular emphasis on crystal chemistry and phase transitions, the structure of the γ phase has been determined at 583 K using a single-crystal analysis. Both structural and nonlinear optical measurements indicate a β–γ first-order ph…
Abstract Sr 0.2 Na 0.4 Nd 0.4 Bi 4 Ti 4 O 15 is prepared by Sol‐Gel route using the modified polymeric precursor method based on the Pechini process and its electrical properties are investigated by Complex Impedance Spectroscopy (CIS). Results are presented in two ways, complex plane plots (real versus imaginary) and…
Abstract Two new monomers (2‐methyl‐oxiranylmethyl)‐phosphonic acid dimethyl ester ( 3 ) and [2‐(dimethoxy‐phosphorylmethyl)‐oxyranylmethyl]‐phosphonic acid dimethyl ester ( 6 ) were prepared and used with dicyandiamide ( 7 ) and citric acid ( 8 ) to impart flame resistance to cotton plain weave, twill, and 80:20‐cott…
GeS 2 –Sb 2 S 3 –CsCl glass–ceramics with fine porous surfaces were synthesized and tested as optical elements. The porosity is obtained through a two‐step process, including controlled nucleation of CsCl nuclei in the glass matrix followed by selective etching of the nuclei with an acid solution. The porous surface i…
ABSTRACT Structural ceramics are brittle and sensitive to flaws. As a result, the structural integrity of a ceramic component may be seriously affected by inherent flaws. Self‐crack‐healing is an excellent answer to this problem. At the moment, however, there is no technique to heal embedded flaws. Therefore, a techni…
Abstract MWNTs of various sizes were compounded into SPI matrix by solution mixing and then compression‐molded into nanocomposite sheets, which were characterized by XRD, SEM, TEM, and tensile and water uptake testing. The resultant nanocomposites showed improved mechanical performance and higher water resistance depe…
Abstract Two kinds of hybrids based on diallyl bisphenol A modified bismaleimide (BMI‐BA) and carbon nanotubes (CNTs) or aminated carbon nanotubes (A‐CNTs) were prepared, their static and dynamic mechanical properties were investigated in detail by using impact and flexural measurements as well as dynamic mechanical a…
Abstract A novel amphiphilic biodegradable triblock copolymer (PGL‐PLA‐PGL) with polylactide (PLA) as hydrophobic middle block and poly(glutamic acid) (PGL) as hydrophilic lateral blocks was successfully synthesized by ring‐opening polymerization (ROP) of L ‐lactide (LA) and N ‐carboxy anhydride (NCA) consecutively an…
Abstract Cationic copolymerization of L,L ‐lactide (LA) and ε‐caprolactone (CL) initiated by low molecular weight diols in the presence of acid catalyst gives corresponding copolyesters terminated at both ends with hydroxyl groups in practically quantitative yield. Copolymerization proceeds by Activated Monomer mechan…
High Resolution Image Download MS PowerPoint Slide The electron storage and discharge properties of single wall carbon nanotubes (SWCNTs) are probed by their interaction with radiolytically and photolytically produced methyl viologen (MV +• ) radicals. Quantitative estimation of stored electrons amounts to one electro…