Materials Literature
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Abstract The crystallization behavior of nylon 1212, irradiated at 60 Co γ‐rays (50 kGy), was studied by a rheometer, polarized optical microscopy (POM), and differential scanning calorimeter (DSC). The results showed that irradiated nylon 1212 samples exhibited abnormal crystallization behavior during the crystalliza…
Reaction between cationic units of carboxylate-bridged diruthenium complexes [Ru(2)(mu-O(2)CR)(4)](+) (R = Me, CMePh(2), CMe(3), CH(2)CH(2)OMe, C(Me)=CHEt, C(6)H(4)-p-OMe, Ph) and tetrabutylammonium perrhenate gives complexes with different arrangements in the solid state. Thus, the compounds Ru(2)(mu-O(2)CR)(4)(ReO(4…
Abstract The conversion of 12‐metallacrown‐4 complexes with copper( II ) in the central cavity to 15‐metallacrown‐5 complexes with lanthanide( III ) ions in the central cavity upon addition of trivalent lanthanide ions was analysed in solution by electrospray ionisation mass spectrometry (ESI‐MS), absorption spectroph…
Abstract Narrow fractions of a side‐chain acrylate oligomer/polymer with phenyl benzoate side chains are separated in a broad range of the degree of polymerization (7 ≤ P w ≤ 149). An examination of the phase behavior of the obtained fractions has shown that only the longer macromolecules can form the two‐dimensional…
The growth of silver at room temperature on the two polar faces of ZnO, (0001) Zn terminated and $(000\overline{1})$ O terminated, has been investigated in situ by using grazing incidence x-ray diffraction and grazing incidence small angle x-ray scattering (GISAXS). On both surfaces, silver forms nanoclusters with (11…
Multilayer assemblies containing various cell-adhesive proteins such as gelatin, collagen IV, and laminin or polycations polylysine and poly(ethyleneimine) were immobilized on the polystyrene surface using the layer-by-layer technique based on hydrophobic and electrostatic interactions between oppositely charged macro…
We report herein the effect of palladium on the redox electrochemistry of ferrocene monocarboxylic acid encapsulated within an organically modified sol-gel glass network (ORMOSIL). It has been found that amount of palladium and its geometrical distribution significantly alter the redox electrochemistry of FcMCA. The g…
For classical elasticity, the constitutive equations (Hooke’s law) have the same functional form for both homogeneous and nonhomogeneous materials. However, for strain-gradient elasticity, such is not the case. This paper shows that for strain-gradient elasticity with volumetric and surface energy (Casal’s continuum),…
Application of polynuclear metal clusters for phasing X-ray crystal structures of macromolecules is discussed. Their strong isomorphous and anomalous scattering signal is particularly useful for phasing structures of large macromolecules and complexes, especially at low resolution. The popularity of the metal clusters…
Abstract Magnetic crystals were formed using supramolecular cation structures that consist of ( S )‐AIH + (dibenzo[18]crown‐6), ( R )‐AIH + (dibenzo[18]crown‐6), or ( RS )‐AIH + (dibenzo[18]crown‐6) (AIH + = indan‐1‐aminium) as the counter cation to [Ni(dmit) 2 ] – ions (dmit 2– = 2‐thioxo‐1,3‐dithiole‐4,5‐dithiolate)…
The ideal torsional strengths of a class of carbon nanotubes, and the torsional stiffnesses of all carbon nanotubes are computed using a novel combination of an ab initio electronic structure total energy technique and a physically motivated scaling form. The specific torsional strengths of multi-walled tubes are pred…
The quality of life of patients who wear an orbital prosthesis would be vastly improved if their prostheses were also able to execute vertical and horizontal motion. This requires appropriate actuation and control systems to create an intelligent prosthesis. A method of actuation that meets the demanding design criter…
Heterophasic propylene−ethylene copolymers (HPEC) containing 1 wt % bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate (Tinuvin 770) as a hindered amine stabilizer (HAS) were aged by exposure of ≈3 mm thick plaques to UVA and UVB sources in weathering chambers at 318 K. Two types of copolymers, HPEC1 and HPEC2, were exam…
Preparation of a nearly stoichiometric $\mathrm{Mg}[{\mathrm{Ti}}_{2}]{\mathrm{O}}_{4}$ spinel with a transition at ${T}_{t}=260\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ has been accomplished by solid-state reaction. Schmidt et al. [Phys. Rev. Lett. 92, 056402, 2004] have shown a tetragonal $(c∕a<1)$-cubic transition…
We investigate a thin Sn film grown at elevated temperatures on the fivefold surface of an icosahedral $\mathrm{Al}\mathrm{Cu}\mathrm{Fe}$ quasicrystal by scanning tunneling microscopy (STM). At about one monolayer coverage, the deposited Sn is found to form a smooth film of height consistent with one-half of the la…
PURPOSE: In vitro evaluation of labeling efficiency of human mesenchymal stem cells (hMSCs) with different types of superparamagnetic iron oxide nanoparticles as well as detection and quantification by MRI at 3T. MATERIAL AND METHODS: hMSCs were incubated for 24 hours with 5 ultrasmall superparamagnetic particles of i…
The ferromagnetic state of thin ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ layers ($d=300\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$; $x=0.014$, $p=6.7\ifmmode\times\else\texttimes\fi{}{10}^{19}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$, ${T}_{C}=40\phantom{\rule{0.3em}{0ex}}\mathrm{K}…
We have performed numerical calculations and experimental studies on the dipole-dipole interaction in the hexagonal nanowire arrays. Using the dipole approximation with a length correction, the dipolar fields in the cylindrical wire arrays were calculated. By means of M\"ossbauer spectroscopy, the dipolar fields in th…
The synthesis of two chiral isomers of 3-substituted polythiophenes, with cationic side-chain functionalities, and their use as conformational sensitive optical probes for the recording of pH-induced conformational changes in a synthetic peptide are reported. The conformational changes of the synthetic peptide gives r…
This contribution describes the synthesis of gold nanorod (Au NR)/single-wall carbon nanotube (SWCNT) heterojunctions assembled directly on Si/SiOx substrates. SWCNTs are attached to amine-functionalized Si/SiOx substrates, and Au monolayer-protected clusters (MPCs) are adsorbed to the surface of SWCNTs through hydrop…