Materials Literature
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We present a computationally efficient semi-empirical method, based on standard first-principles techniques and the so-called virtual crystal approximation, for determining the average atomic structure of crystals with substitutional disorder. We show that, making use of a minimal amount of experimental information, i…
Cyclisierung im Dreierpack: Mit einer dreifachen Pictet-Spengler-Reaktion als Schlüsselschritt wurden Triazacoronen-Derivate in vier Stufen ausgehend von Veratrol synthetisiert. Die Produkte haben interessante photophysikalische und elektronische Eigenschaften und sind thermisch beständig sowie löslich, sodass sie vie…
Abstract We report a facile way of preparing microfluidic channels filled with electrospun functional fibers. Patterned elastic molds were in tight contact with electrospun fiber mats without any leak of the analyte solution. As an example of the simple devices, we demonstrated a microfluidic protein chip selectively…
The reactions of copper(II) salts, 1,3-bis(dimethylamino)-2-propanol (bdmapH) or 1,3-bis(amino)-2-propanol (bapH) and [(Tp)Fe(CN)(3)](-) (Tp = tris(pyrazolyl)hydroborate) gave four mixed-bridged heterometallic one-dimensional (1D) coordination polymers, {[(Tp)(2)Fe(2)(CN)(6)(OAc)(bdmap)Cu(2)(H(2)O)]·2H(2)O}(n) (1, HOA…
Author: Bier, M. et al.; Genre: Journal Article; Issued: 2010-09-28; Keywords: MPI für Metallforschung; Abt. Dietrich; Soft Matter at Interfaces; ; Title: Phase diagrams of binary mixtures of oppositely charged colloids
Abstract Tissue engineering is a promising interdisciplinary scientific field of regenerative medicine. Aiming at the structural and functional restoration of damaged tissues and organs, it possesses a role of significant socioeconomical impact. In the course towards the ultimate goal of artificially constructed natur…
Submicron-structured (Bi 0.5 Na 0.5 ) 0.94 Ba 0.06 TiO 3 (BNBT6) ceramics were obtained from nanometric powder synthesized by sol–gel auto-combustion at 500 °C. Hot-pressing at low temperatures and a combination of this with recrystallization, still moderate in order to reduce the loss of volatile elements, have been…
${\text{KCrF}}_{3}$ represents another prototypical orbital-ordered perovskite, where ${\text{Cr}}^{2+}$ possesses the same electronic configuration of $3{d}^{4}$ as that of strongly Jahn-Teller distorted ${\text{Mn}}^{3+}$ in many colossal magnetoresistance manganites. The crystal and magnetic structures of ${\text{K…
An innovative unimolecular precursor structure based on cadmium-bis(benzylthiolates), Cd(SBz) 2, has been devised for the preparation of polymer/CdS nanocomposite materials through a simple and inexpensive synthetic route. Cd(SBz) 2 and [Cd(SBz) 2 ] 2 ·MI, MI being methyl imidazole, dispersed in a polymer matrix have…
We report the results of x-ray photon correlation spectroscopy (XPCS) experiments on multilayers of a photosensitive azo-polymer which can be softened by photoisomerization. Time correlation functions have been measured at different temperatures and momentum transfers (q) and under different illumination conditions (d…
We report on investigations of the electronic structure and magnetic properties of ZnO doped with $15\text{ }\text{at}\text{.}\text{ }\mathrm{%}$ Co and postgrowth annealed at temperatures ranging between 250 and $800\ifmmode^\circ\else\textdegree\fi{}\text{C}$. In particular, we demonstrate how the presence of ${\tex…
The ability to direct polymer structure on the nanometer scale has provided access to enhanced material properties that may be tailored to accommodate a growing number of advanced biological and industrial applications. A promising method of generating nanostructure in organic polymers uses self-assembling lyotropic l…
Abstract A series of poly(ether urethane) networks were synthesized from polyether polyols obtained by ionic‐coordinative polymerization of epoxidized methyl oleate (EMO) using 4,4′‐methylenebis(phenyl isocyanate) or l ‐lysine diisocyanate as coupling agents. Moreover, a variety of segmented poly(ether urethane) netwo…
A series of borondipyrromethane (BODIPY)-dye-labeled resorcin[4]arene cavitands 1-4 with different lengths of oligo(phenylene-ethynylene) spacers between the dyes and the macrocyclic rim has been synthesized. Their switching behavior from the "vase" to "kite" conformations in bulk solution was examined by both variabl…
This paper reports the self-assembling and electrochemical nature of hexaazatriphenylene-based electron-deficient heteroaromatics with an expanded π-electron system. The tri(phenanthro)hexaazatriphenylenes (TPHAT-Cs) and tri(phenanthrolino)hexaazatriphenylenes (TPHAT-Ns) were prepared by condensation reactions of the…
Sequential treatment of trimethylsilylethynyl-TTF (TTFMe 3 ) 3a dissolved in methanol with potassium fluoride, the chloro complex Cp*(dppe)FeCl ( 8; Cp* = η 5 -C 5 (CH 3 ) 5, dppe = 1,2-bis(diphenylphosphino)ethane) in the presence of ammonium hexafluorophosphate, and finally with KOBu t provided Cp*(dppe)FeC≡C-TTFMe…
The resistivity of metallic structures depends on both electron-grain boundary scattering and electron-surface scattering. By tuning the grain size, we have been able to separate the contribution to the resistivity originating in electron-grain boundary scattering, from that arising in electron-surface scattering, on…
Several Au/Al 2 O 3 catalysts were prepared and evaluated in the oxidation of l -arabinose. Metal cluster size was varied by application of different preparation methods (DPU and DIE), washing agents (ammonia or water), calcination temperatures, and concentrations of the initial precursor solutions. The structure sens…
Mapping by angle-resolved photoemission spectroscopy of the spectral functions of graphite and graphene layers at low temperatures reveals a heretofore unreported gap of ~ 67 meV at normal emission. This gap persists to room temperature and beyond, and diminishes for increasing emission angles. We show that this gap a…
Some years ago, Prigogine minimum entropy production principle was generalized by Lebon and Dauby to account for the nonlocal heat transport equation derived by Guyer and Krumhansl. Here, this criterion is extended to incorporate the effects of heat slip flow along the walls. This formulation is shown to be useful for…