Materials Literature
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The approach based on the incubation time concept is used to analyze experimental data on acoustic cavitation in degassed water and in sea water. Earlier, a similar approach proved to be effective in analyzing the cavitation due to pulse loading and in studying the dynamic strength of solids. The proposed criterion ta…
Abstract Thermal degradation of the glycolide/trimethylene carbonate copolymer used for bioabsorbable surgical sutures (Maxon™) has been studied by isothermal and nonisothermal methods. Thermal decomposition always follows a single mechanism, although some differences have been found between the two performed analyses…
The preparation of Si1-xGex alloy nanocrystals via the simultaneous thermally induced disproportionation of hydrogen silsesquioxane and germanium diiodide is reported. The presented method affords oxide encapsulated nanocrystals that are readily liberated upon hydrofluoric acid etching to yield freestanding hydride su…
Abstract A novel hybrid film composed of copolyimide with hydroxyl group, silica and γ‐glycidyloxypropyltrimethoxysilane (CPI‐OH/SiO 2 /GOTMS) was prepared by the sol–gel process based on hydrolyzed tetraethoxysilane (TEOS) under acidic condition. GOTMS, as the coupling agent, and hydroxyl group in PI chain were used…
Iron is essential for the survival of almost all organisms, although excess iron can result in the generation of free radicals which are toxic to cells. To avoid the toxic effects of free radicals, the concentration of intracellular iron is generally regulated by the ferric uptake regulator Fur in bacteria. The 150 aa…
Composites consisting of magnetic shape memory (MSM) particles embedded in a polyester matrix were prepared. Single-crystalline MSM particles were obtained by mortar grinding of melt-extracted and subsequently annealed Ni50.9Mn27.1Ga22.0 (at. %) fibers. The crystal structure of the martensite is tetragonal (5M) with c…
The dehydratation process of layered lanthanide silicates K3[LnSi3O8(OH)2], Ln = Y, Eu, Tb, and Er, and the structural characterization of the obtained small-pore framework K3LnSi3O9, Ln = Y, Eu, Tb, and Er solids, named AV-23, have been reported. The structure of AV-23 has been solved by single-crystal X-ray diffract…
Oriented lamellar structures were developed in a blend of poly(1,4-butylene succinate) (PBSU) and poly(vinylidene fluoride) (PVDF), a miscible crystalline/crystalline polymer blend, by uniaxial compression flow using a pair of channel plates. The temperatures of the compression flow were varied in the range 140−163 °C…
In this paper, we present a new approach based on crystallization onto self-assembled multilayers (SAMs) for the control of polymorphism. To demonstrate our approach, we studied the crystallization of l -glutamic acid on a self-assembled multilayer of a phenyalanine derivative. It is shown that crystallization of l -g…
Received 16 March 2007DOI:https://doi.org/10.1103/PhysRevLett.98.129903©2007 American Physical Society
Abstract Polyaniline–polypyrrole (PANI‐PPy) composite was prepared by in situ polymerization of pyrrole in PANI dispersion using FeCl 3 ·6H 2 O as oxidant and sodium dodecyl benzene sulfonate (SDBS) as surfactant. Different synthesis conditions of PANI dispersion including the relative concentration of aniline and SDB…
Abstract An aromatic diamine containing both sulfone and diphenyl ether groups, bis[4‐(4‐aminophenoxy)phenyl]sulfone, was synthesized in a two‐step way, whose structure was confirmed through Fourier transform infrared spectrometry, nuclear magnetic resonance, and elemental analysis. Then, the obtained BAPS was used as…
Two neutral dinuclear metallamacrocycles, [Cu2(hbca)2].2CHCl3.2H2O (1) and [Zn2(hbca)2].7H2O (2), have been assembled from reactions of the new rigid carbazole-based ligand H2hbca [N,N'-bis(2-hydroxobenzylidene)-9H-carbazole-3,6-diamine] with copper(II) or zinc(II) acetate. The extended aromatic ligand spacer is respo…
Verhaltensmuster: In CHCl3 erzeugte Komplexe aus dem Cluster {Mo72Fe30} und dem Tensid Dioctadecyldimethylammoniumchlorid (DODMACl) bilden beim Verdampfen des Lösungsmittels Muster mit Wabenstruktur an der Luft-Wasser-Grenzfläche (siehe SEM-Bild). Die Tensidkonzentration entscheidet, ob die {Mo72Fe30}-Makroanionen in…
Using first-principles calculations with ultrasoft pseudopotential formalism and the generalized gradient approximation for the exchange-correlation functional, we study the stability of MonSm (n =1-6 and m ranging from n to 3n) clusters and obtain the optimal stoichiometry for each n corresponding to the magic cluste…
Three new metal complexes with 1,2-bis(2'-methyl-5'-(carboxylic acid)-3'-thienyl)perfluorocyclopentene (BM-5-CATP) were synthesized and characterized by X-ray diffraction analysis. BM-5-CATP serves as a bis-monodentate ligand that bridges metal centers to generate three 1D polymers. The two thienyl rings in the three…
Molecular dynamics simulations are employed to elucidate the important factors in mechanical energy transfer between carbon nanotubes. Our calculations show that sharp resonance effects allow for near complete and highly efficient energy transfer. In addition, the weak coupling between two nanotubes sets the time scal…
Polarization and angle-resolved two-photon photoelectron spectroscopy was employed to determine the adsorption geometry of di-tert-butyl-perylene when anchored via two different acid groups on rutile $\mathrm{Ti}{\mathrm{O}}_{2}(110)$. With the carboxylic acid group as anchor and a rigid bridge group the binding geome…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTIn-Situ Formation of CdS Nanoarrays by Pore-Filling Nanoporous Templates from Degradable Block CopolymersKuan-Hsin Lo, Wen-Hsien Tseng, and Rong-Ming HoView Author Information Department of Chemical Engineering, National Tsing-Hua Unive…
We have synthesized a Sr 2 CrReO 6 double perovskite sample with the expected high Curie temperature ≈ 600 K, which shows negligible impurity phases and ≈ 15% Cr/Re structural antisite disorder as shown by X-ray and neutron diffraction. High-field magnetization measurements up to 47 T show that the saturation magnetiz…