Materials Literature
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C3-symmetrical molecules are described which consists of a 1,3,5-benzenetricarboxamide core extended with dipeptide fragments bearing peripheral mesogenic groups. Small structural modifications in the dipeptide fragment have been performed to demonstrate their influence on the stability of the stacks and on the order…
Well-aligned plain CdS and ternary Cd 1- x Zn x S nanowire arrays were successfully fabricated via a noncatalytic and template-free metal−organic chemical vapor deposition process. The nanowires were grown on a 1 μm thick buffer layer formed in situ on the surface of silicon substrates. These nanowires were 20−40 nm i…
Avoiding toxic starting materials such as (CH3)4Sn, a cheap, environmentally benign high-yield synthesis has been developed for the multitalented catalyst methyltrioxorhenium(VII) (MTO; see picture: black C, white H, blue Re, red O). This novel approach is applicable on a large scale and for several derivatives of MTO…
Significant improvements of the microdomain order in cylinder-forming diblock copolymer thin film samples subjected to directional solidification are reported. Samples annealed in a sweeping solidification front have defect densities reduced by two orders of magnitude compared to regular thermal annealing, whereas add…
The kinetics of the polycondensation of A 2 and B 3 monomers leading to hyperbranched polyesters was studied by NMR spectroscopy and compared with theoretical predictions. Combinations of two different A 2 monomers, the aromatic terephthaloyl chloride (TCl, A 2 ) and the aliphatic adipic acid (AA, A 2 ), respectively,…
We present a detailed investigation of the electrical properties of epitaxial ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}∕\mathrm{Sr}{\mathrm{Ti}}_{0.98}{\mathrm{Nb}}_{0.02}{\mathrm{O}}_{3}$ Schottky junctions. A fabrication process that allows reduction of the junction dimensions to current ele…
In contradiction to current bonding paradigms, two terminal Au-oxo molecular complexes have been synthesized by reaction of AuCl3 with metal oxide-cluster ligands that model redox-active metal oxide surfaces. Use of K10[alpha2-P2W17O61].20H2O and K2WO4 (forming the [A-PW9O34]9- ligand in situ) produces K15H2[Au(O)(OH2…
Microscopic polymer liquid state theory is employed to study the real space pair correlation functions and collective scattering structure factors of melt polymer nanocomposites composed of hard spheres and adsorbing homopolymers over length scales ranging from monomeric to macroscopic. Increasing filler volume fracti…
Maghemite-Au core-shell nanoparticles incorporated into a polyaniline film associated with an electrode lead to reversible, magnetoswitchable, controlled charge transport across the polymer, and to magnetoswitchable bioelectrocatalysis (see figure).
Abstract Blends of polyamide6 (PA6) and acrylonitrile butadiene styrene (ABS) were prepared in presence or absence of up to 5 wt % of a reactive compatibilizer [styrene maleic anhydride copolymer (SMA) modified with 5 wt % multiwall carbon nanotubes (MWNT)] by melt‐mixing using conical twin screw microcompounder where…
Highly ordered arrays of boron nitride nanotubes (BN-NTs) were prepared for the first time by combining a polymer thermolysis route and a template process. The strategy involves four steps, i.e., synthesis of a liquid polymeric borazine, liquid-phase infiltration of an alumina membrane, thermolysis at 1200 °C under ni…
Abstract Novel apatite‐type silicates are attracting considerable interest as a new family of oxide‐ion conductors with potential use in fuel cells and ceramic membranes. Combined computer modeling and X‐ray absorption (EXAFS) techniques have been used to gain fresh insight, at the atomic level, into the site selectiv…
Abstract A composite material consisting of hydroxide‐modified hemp fibres and euphorbia resin was produced. The composites were tested in tension, short‐beam interlaminar shear stress and in impact. There was an increase in the tensile strength and modulus for resins with high‐hydroxyl‐group based composites. Similar…
Nowadays, the majority of the commercially available calcium phosphate materials is fabricated by 'classical' materials science approaches, i.e., from rather poorly defined slurries or from organic solvents, often at high temperatures and pressures. Bioinspired precipitation of inorganics with (polymeric) additives fr…
Nanocomposites films have been processed from a filler and a matrix having the same nature, i.e. waxy maize starch. The filler consists of nanoplatelet-like starch particles obtained as an aqueous suspension by acid hydrolysis of starch granules and the matrix was prepared by plasticization and disruption of starch gr…
Abstract We describe the development and optimization of porous silicon photonic crystal surface chemistry towards implantable optical devices. Porous silicon rugate filters were prepared to obtain a narrow linewidth reflectivity peak in the near‐infrared (700–1000 nm) with low background reflectivity elsewhere. The m…
Abstract Inorganic nanofillers, CaCO 3 and nanoclay, are widely applied to improve the mechanical properties of polypropylene (PP). In general, the use of spherical CaCO 3 can enhance the impact strength while the use of layered nanoclay can enhance the modulus and yield stress. With the objective to simultaneously im…
Abstract In this study, we report the fabrication of a novel surface with both morphology and composition heterogeneities by casting polymer blend solution. The resultant poly (methyl methacrylate) (PMMA) and amphiphilic polyurethane (A‐PU) surface has a rough structure on microscale and separated hydrophobic and hydr…
Soil is a particulate material and its constituent particles have a wide range of sizes. Nanoparticles of usually 1 to 100 nm are the smallest particles in soil environments and exist in one of the three different forms: nanoplatelets, nanowires or nanotubes, and nanodots. Due to their tiny size, soil nanoparticles us…
Two new noncentrosymmetric (NCS) polar quaternary oxides, TlMVO 5 (M = Se 4+ or Te 4+ ), have been synthesized by hydrothermal techniques using Tl 2 CO 3, SeO 2 (TeO 2 ), and V 2 O 5 as reagents. The structures were determined by single-crystal X-ray diffraction (TlSeVO 5, orthorhombic, space group Pna 2 1 (No. 33) wi…