Materials Literature
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Auf Nanoröhren verankert: Der selbstorganisierte Aufbau von Hybriden aus Einzelmolekülmagneten (SMMs) und Kohlenstoffnanoröhren (CNTs; siehe Bild) gelingt unter Bedingungen, die sich auch zur Erzeugung elektronischer Funktionseinheiten eignen. Der Prozess lässt sich auf molekularer Ebene steuern, und die resultierende…
The aromatic polyimides (PIs) containing pendent tert -butyl side groups were synthesized via polycondensation of 1-(4-aminophenoxy)-4-(4-aminophenyl)-2,6-di- tert -butyl-benzene ( 4 ), 4-(4-aminophenyl)-1-(4-amino-2-trifluoromethylphenoxy)-2,6-di- tert -butyl-benzene with various aromatic tetracarboxylic dianhydrides…
An ATR-FT-IR-based method was applied to measure the degree of substitution (DS) of esterified cellulose. The strategy makes use of the capability of certain ionic liquids (ILs) to dissolve cellulose derivatives. To avoid high viscosity that could hamper the correct measurement, a mixture of DMSO/IL (2 : 1, w/w) was a…
Unsymmetrical crown ether derivatives 7 and 12 with one lateral o-terphenyl unit bearing different ester substituents were synthesized starting from methoxymethyl (MOM) protected bromobenzenes 3 and 8 by conversion into the respective borolanes 4 and 9, twofold Suzuki coupling with dibromobenzo[15]crown-5, acidic depr…
A characteristic of so‐called melting gels is that the gels, which are rigid at room temperature, are able to soften and resoften at temperatures around 110°C. However, after consolidation at temperatures higher than 150°C, the gels no longer resoften. Two systems of melting gels were investigated: phenyltrimethoxysil…
Crystal engineering of two new fully oxidized decavanadate based 1-D solid {Cu(pz)4}[{Cu(pz)3}2V10O28], 1 and a 2-D inorganic–organic hybrid solid (Hpz)2[{Cu(pz)4}2V10O28]·2H2O, 2 have been effected under self-assembly condition. 1 contains 1-D anionic chains of the composition [{Cu(pz)3}2V10O28] intercalated with {Cu…
The replacement of one of the acetate pendant arms with a 2-methylpyridine-N-oxide group in the molecule of H4dota significantly alters the coordination properties of the ligand in Ln(III) complexes. The structural properties of the complexes are investigated both in solution and in the solid state. The variable-tempe…
Systematic studies of the NdFeAsOF superconducting energy gap using point-contact Andreev-reflection (PCAR) spectroscopy are presented. At low temperatures the PCAR conductance spectra show a pair of gap-like peaks at about ± (4–7) mV and in most cases also a pair of humps at around ± 10 mV. Fits to the s-wave two-gap…
ZnO nanorod arrays with controlled diameter and density were synthesized on Si substrate with thereon two-dimensional periodic polymer aperture arrays at low temperature. A sharp size and density variation of ZnO nanorod arrays with the size of aperture was observed. Surprisingly, the diameter of the ZnO nanorod was l…
In this paper we report, for the first time, the alignment enhanced photoconductivity of single wall carbon nanotube films upon laser illumination. The photoconductivity exhibited an increase, decrease or even 'negative' values when the laser spot was on different positions between contact electrodes, showing a 'posit…
We report on a new method for enhancing the specificity of drug delivery for tumor cells, using thermosensitive immunoliposomes. The liposomes are conjugated to the antibody trastuzumab (Herceptin), which targets the human epidermal growth factor receptor 2 (Her-2), a cell membrane receptor overexpressed in many human…
The unit-cell volume of rhenium diboride $({\text{ReB}}_{2})$ has been measured by synchrotron x-ray diffraction at pressures and temperatures of up to 7.5 GPa and 1100 K with a cubic anvil apparatus. From the pressure $(P)$-volume $(V)$-temperature $(T)$ measurements, thermoelastic parameters were derived for ${\text…
Hydrogen-bonded layer-by-layer assembled films from poly(vinyl pyrrolidone) (PVPON) and poly(acrylic acid) (PAA) were fabricated. Fabry–Perot fringes were used as a simple but efficient method for studying the structure changes in the films during salt treatment. Results indicate that these films are very sensitive to…
Catalytic wet peroxide oxidation (CWPO) of organic contaminants may have a possible path for the treatment of decontamination waste containing chelating agents that cause a complex with radioactive cations leading to interferences in their removal by various techniques and may pose a hazard to the environment. The aim…
A new all-atom force field capable of accurately predicting the bulk and interfacial properties of 1,1,1,2-tetrafluoroethane (HFA134a) is reported. Parameterization of several force fields with different initial charge configurations from ab initio calculations was performed using the histogram reweighting method and…
A series of one-dimensional conductors, TPP[FeIII(Pc)L2]2 with L = CN, Cl, and Br, have been prepared. These compounds show giant negative magnetoresistance due to the interaction between conduction π-electrons and localized Fe-centered d-spins, but the magnitude is found to vary based on the axial ligand, suggesting…
In response to the growing need for metal oxide nanotubes and nanowires for nanoelectronic applications, polycrystalline titanate nanotubes are synthesized in this work at near-ambient conditions without the application of an external electric field or pre-existing solids. Nanotubes of complicated metal oxides includi…
A simple and efficient way of synthesizing conducting polymers on polymer templates and subsequently improving the connectivity between fibers and hence improving the electrical conductivity of nonwoven porous conducting polymer nanofiber mats is reported. The poly(3,4-ethylenedioxythiophene) (PEDOT) conducting polyme…
The polymer layers adsorbed on silica particles in rubber−silica systems have been investigated with the contrast variation small-angle neutron scattering (SANS) method. The scattering intensities of specimens swollen by solvents with various scattering length densities were measured. The contrast variation SANS for t…
In this study, a finite element model to predict shear force versus shear angle for woven fabrics is developed. The model is based on the TexGen geometric modelling schema, developed at the University of Nottingham and orthotropic constitutive models for yarn behaviour, coupled with a unified displacement-difference p…