Materials Literature
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It has been reported that protein adsorption on single-walled carbon nanotube field effect transistors (FETs) leads to appreciable changes in the electrical conductance of the devices, a phenomenon that can be exploited for label-free detection of biomolecules with a high potential for miniaturization. This work prese…
The assembly properties of two- and three-component rod-like building blocks consisting of gold and polymer block domains have been investigated. These structures behave like mesoscopic amphiphiles and form a series of single-layer superstructures consisting of bundles, tubes, and sheets depending upon the composition…
A water-soluble, blocked diisocyanate was proven to support stable growth of bilayers with branched poly(ethylenimine), bPEI, in a layer-by-layer (LBL) technique. A quartz crystal microbalance and ellipsometry were employed to measure bilayer formation and infrared spectroscopy of LBL deposited films of hexamethylene-…
Abstract To improve equilibrium water content, dehydrothermally crosslinked poly(vinyl alcohol) (PVA) hydrogel was grafted with N ‐vinyl pyrrolidone (NVP) or acrylic acid (AA) monomer using γ‐radiation. Swelling behavior of the grafted hydrogels was studied in phosphate‐buffered saline, and cell viability was evaluate…
The model-free approach has been extended with the derivation of a novel three-nuclei crystal-field independent method for investigating isostructurality in nonaxial (i.e., rhombic) complexes along the lanthanide series. Application of this technique to the heterotrimetallic sandwich complexes [LnLu2(TACI-3H)2(H2O)6]3…
A layered mixed-valence manganese complex, [Mn(II)(2)(bispicen)(2)(mu(3)-Cl)(2)Mn(III)(Cl(4)Cat)(2)Mn(III)(Cl(4)Cat)(2)(H(2)O)(2)](infinity), is synthesized and characterized structurally. It displays a slow magnetic relaxation and hysteresis effect.
The synthesis of Si−B−N−C ceramic materials can be accomplished via two different routes using B-tris(trichlorosilylvinyl)borazine ( 2 ) as starting material. This silyl-functionalized ethinylborazine is obtained by Pt-catalyzed hydrosilylation of B, B‘, B‘ ‘-tri-ethynylborazine ( 1) with HSiCl 3 in quantitative yield…
Abstract In the microelectronics industry, the drive for increasing device speed, level of functionality and shrinking size has placed significant demands on the performance characteristics of polymer dielectrics. In this study, a negative acting, photodefinable dielectric formulation based on a copolymer of decylnorb…
Außerordentlich große, planare Porphyrin-Systeme, zusammengesetzt aus 49 Nichtwasserstoffatomen in hochgradig delokalisierten π-Systemen, zeigen gemäß UV/Vis/NIR-Spektroskopie und Cyclovoltammetrie ausgesprochen niederenergetische Übergänge. Die gezeigten Spektren stammen von dem abgebildeten cis-Palladiumkomplex und…
The lattice location of copper in single-crystalline zinc oxide was studied by means of the emission channeling technique. Following 60-keV room-temperature implantation at a fluence of $2.3\ifmmode\times\else\texttimes\fi{}{10}^{13}{\mathrm{cm}}^{\ensuremath{-}2},$ the angular distribution of ${\ensuremath{\beta}}^{\…
The specific features of relaxation kinetics in systems with different kinds of confinements are discussed in the paper. In contrast to the usual Arrhenius, Eyring, or Vogel-Fulcher-Tammann patterns, a quite unusual nonmonotonic dependence of relaxation time versus temperature is observed in such systems. Based on the…
2D-Kristalle durch Ladungsänderung: Dichte Schichten individuell geladener Nanokristalle bilden sich an der Grenzfläche zwischen wässriger und organischer Phase durch leichte Reduktion der Oberflächenladung. Die Schichten sind bemerkenswert robust und kriechen am Probenglas hinauf (siehe Bild). Diese Eigenschaft sollt…
Imprismed metals: Hydrothermal crystallization of Fe and Co oxalates from extremely concentrated KBr solutions yield a coordination network where the paramagnetic metal ions are in rare coordination geometries (see structure). Both materials show a strong 1D magnetic character and for the FeII derivative no long-range…
Materials deposited in continuous wave (cw) and pulsed low-pressure octafluoropropane (C3F8) and octafluorocyclobutane (c-C4F8) plasmas were characterized using Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy, static contact angle measurements, spectroscopic ellipsometry, and scanning…
With the new substituted pyrazine ligand pyrazine-2,3-dicarboxylic acid bis[(pyridin-2-ylmethyl)amide], H(2)L, a binuclear complex [Cu(2)(LH)(Cl(3))(H(2)O)].H(2)O (1) and two [2 x 2]G grid complexes, [[Cu(4)(LH)(4)](ClO(4))(4)].5CH(3)OH.4H(2)O (2) and [[Ni(4)(LH)(4)]Cl(4)].5CH(3)CN.13H(2)O (3), have been synthesized a…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA Novel Lattice-Hardening Process To Achieve Highly Efficient and Thermally Stable Nonlinear Optical PolymersMarnie Haller, Jingdong Luo, Hongxiang Li, Tae-Dong Kim, Yi Liao, Bruce H. Robinson, Larry R. Dalton, and Alex K.-Y. JenVie…
A templating method is used to create conductive polymers that have a helical superstructure. The driving force is an electrostatic interaction between the negative charge in a synthetic lipid and the cationic charge generated in the polymers during oxidative electrochemical polymerization of ethylenedioxythiophene (E…
We have studied the high-bias transport properties of the different shells that constitute a multiwalled carbon nanotube. The current is shown to be reduced as the shell diameter is decreased or the length is increased. We assign this geometrical dependence to the competition between the electron-phonon scattering pro…
Abstract The influences of chemical structure of (meth)acrylate monomers, including the carbon atom number of alkyl ester groups and the α‐methyl group, on the adhesion of polyacrylate sizes to all‐polyester, pure cotton, and polyester/cotton blend fiber substrates are investigated by using an impregnated roving metho…
Carbon nanotubes with different nitrogen contents were produced by the arc-discharge technique. The samples were first submitted to a concentration process (purification) and analyzed by x-ray photoelectron spectroscopy, electron-energy-loss spectroscopy, electron transmission, and scanning electron microscopy to stud…