Materials Literature
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In this study, we systematically investigated 39 secondary amines as additives in concentrated EB/NMP solutions for gelation and degradation. We discovered that when both the width (defined as the longest distance between two hydrogens in the plane perpendicular to the NH bond of the amine) and depth (defined as the l…
A carboxylic acid-substituted picolinic hydrazone ligand (pcoap) forms a homoleptic [2 × 2] tetranuclear Cu(II)4 complex with four six-coordinate Cu(II) centers bridged by μ-O alkoxide groups in a square grid structure. The terminal carboxylic groups complete the six-coordinate structures at each copper centre, cappin…
We study transient drop deformation in dilute emulsions for large values of the capillary number Ca . We consider steady planar linear flows characterized by the dimensionless vorticity β. For drop-to-matrix viscosity ratios λ < 1, we find that the drops are strongly elongated by the extensional component of the flow…
Novel poly(ester−urethane) block copolymer has been synthesized by use of telechelic hydroxylated poly-[( R )-3-hydroxyoctanoate] (PHO-diol) with number-average molecular weight ( M n ) of 2400 as the amorphous soft segment, telechelic hydroxylated poly-[( R )-3-hydroxybutyrate] (PHB-diol) with M n of 2600 as the crys…
Abstract The influence of molecular architecture on morphology, mechanical properties, and micromechanical deformation behavior of asymmetric styrene/butadiene star block copolymers is investigated by transmission electron microscopy (TEM) and uniaxial tensile testing. In contrast to diblock copolymers, star block cop…
Both Fe(C) and Fe(O) nanoparticles have been successfully synthesized using a modified graphite arc-discharge method. X-ray diffraction (XRD), high-resolution transmission electron microscopy (HREM), and electron diffraction (SAED) analyses indicated that both of these Fe nanoparticles have an average grain size of 15…
A novel complexed bridging ligand [Cu(bptap)2] which acts as a ferromagnetic coupler forms one dimensional chain consisting of tri-copper(II) [Cu2(Cu(bptap)2)]4+ units in which adjoining copper(II) ions are ferromagnetically coupled.
We have studied the experimental and theoretical aspects of the interaction of gold nanoshells on a waveguiding structure. Gold nanoshells are core−shell particles consisting of a silica core surrounded by a thin gold shell. The waveguiding structure consists of a 2 μ m thick layer of gold with a dielectric layer of v…
Abstract Electrochemical copolymerization of pyrrole and indole was performed galvanostatically in a solvent of acetonitrile (AN)/water (vol %: 99/1). The product obtained was characterized by cyclic voltammetry and infrared spectroscopy. The influence of the monomer feed ratio of pyrrole and indole on the synthesis o…
A new series of polymeric chainlike materials exhibiting the spin crossover phenomenon has been synthesized in aqueous conditions using different iron(II) salts and 4-(formylamino)-1,2,4-triazole (fatrz). The magnetic and thermogravimetric behaviors of the compounds of general formula [Fe(fatrz) 3 ](A) 2 · x H 2 O are…
On the surface of MgO nanoparticles 1- and multiple (n = 3 and 4) coordinated hydroxyl groups are generated site-selectively and studied by transmission infrared spectroscopy. Their formation is based either on the stepwise dehydration of previously hydrated samples or on simple surface reactions involving molecular h…
In situ high-resolution transmission electron microscopy is used to study grain boundary structure and kinetics in bicrystalline Au films at elevated temperature. We report the first direct evidence for the existence of cooperative atomic motion in grain boundary migration. Certain nanoregions at grain boundaries, typ…
The composites [{Ba(DMSO)5(H2O)}2(SiMo12O40)] (1) and [{Ba(DMSO)3(H2O)3}{Ba(DMSO)5(H2O)}(GeMo12O40)] (2) have been synthesized and characterized by IR and UV spectroscopy, and single-crystal X-ray structural analysis. Compound 1 forms an unprecedented one-dimensional linear chain built from alternating polyanions and…
Abstract A series of damping rubbers based on poly(meth)acrylate and poly(meth)acrylate‐containing silicone rubbers has been prepared. The dynamical mechanical properties were evaluated by using a dynamic mechanical viscoelastometer (DMA). A detailed investigation is reported on the relationship of the damping capabil…
Application of pressure to the nonemitting system ${\mathrm{Lu}}_{2}{\mathrm{O}}_{3}:{\mathrm{Ce}}^{3+}$ leads to the generation of luminescence in the visible. The luminescence is assigned to the $5\stackrel{\ensuremath{\rightarrow}}{d}4f$ transition of ${\mathrm{Ce}}^{3+},$ and is attributed to a pressure-induced el…
Employing photoelectron emission microscopy (PEEM) and scanning photoelectron microscopy (SPEM) the surface reduction of zirconia solid electrolyte under cathodic polarisation has been observed in situ. A microstructured platinum film and a porous platinum paste have been used as electrodes. Starting from the three ph…
Abstract Lamellae‐forming styrene/butadiene star block copolymers are studied to investigate the influence of morphology on micromechanical deformation mechanisms and mechanical properties by using transmission electron microscopy and tensile testing. A large homogeneous plastic deformation of polystyrene (PS) lamella…
Ranjan et al. [Phys. Rev. B 65, 060102(R) (2002)] have recently presented results of a powder neutron-diffraction study of the high-temperature monoclinic ${(F}_{M}^{\mathrm{HT}})$ to low-temperature monoclinic ${(F}_{M}^{\mathrm{LT}})$ phase transition in $\mathrm{Pb}({\mathrm{Ti}}_{1\ensuremath{-}x}{\mathrm{Zr}}_{x}…
Interactions in semiconductor nanocrystal assemblies have been studied on films of the cluster crystal compounds Cd 17 S 4 (SCH 2 CH 2 OH) 26 and Cd 32 S 14 (SCH 2 CH(CH 3 )OH) 36 prepared by spin coating. Misinterpretations of observed alterations of transition energies in theses structures are avoided by the choice…
We report ab initio analysis of current-voltage $(I\ensuremath{-}V)$ characteristics of carbon nanotubes with nitrogen substitution doping. For zigzag semiconducting tubes, doping with a single N impurity increases current flow and, for small radii tubes, narrows the current gap. Doping a N impurity per nanotube unit…