Materials Literature
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High-density arrays of uniform ZnO nanowires with a high-crystal quality have been synthesized by a catalyst-free vapor-transport method. First, a thin ZnO film was deposited on a Si substrate as nucleation layer for the ZnO nanowires. Second, spatially selective and mask-less growth of ZnO nanowires was achieved usin…
Carbon microspheres with unusual magnetic properties have been prepared by the method of solid-phase pyrolysis where metal-free phthalocyanine was used as a precursor. The morphology, structure, and magnetic properties of prepared samples were investigated using electron microscopy, magnetometry, and electron paramagn…
The thermal and dielectric behaviors of mixtures were investigated for systems of p-n-hexyloxybenzoic acid (6OBA) and p-n-octyloxybenzoic acid (8OBA) by differential scanning calorimetry, polarized optical microscopy, and dielectric measurements. The T-X phase diagram was obtained for this system. Eutectic composition…
A novel homologous series of heterocyclic chalconyl esters (C1 to C16) has been synthesized and studied with a view to understanding and establishing the effects of molecular structure on liquid crystal (LC) properties and the degree of liquid crystallinity. The C1 to C6 homologues are not liquid crystals, the C7 homo…
This study investigates the phase formation of Zr‐substituted [(Na 0.5 Bi 0.5 ) 0.80 Ba 0.20 ](Ti 1− y Z r y )O 3 system during its solid‐state synthesis. The synthesis was found to be a multistep process accompanied by the formation of a number of intermediate phases which depend on the solid solution's composition a…
We report the discovery of Fe 2 P-type TiO 2 -based photocatalysts, TiZr 2 O 6 and TiHf 2 O 6, through first-principle calculations. Appearing as the solid solutions of TiO 2 and Zr(Hf)O 2 at 150 GPa, Ti (Zr/Hf) 2 O 6 unit cells are constructed by replacing two Ti atoms with Zr or Hf atoms in the pure Fe 2 P-type TiO…
In an attempt to artificially imitate the importance of side chains in supramolecular architecture stabilization, we have synthesized a set of four model tripeptides Boc-4(X)-Phe-Aib-Yaa-OMe ( I – IV ), where X = I, F, N 3, and Yaa = Ile/Leu, respectively. Our experimental (X-ray crystallography) and computational inv…
Multiscale self-assembly is ubiquitous in nature but its deliberate use to synthesize multifunctional three-dimensional materials remains rare, partly due to the notoriously difficult problem of controlling topology from atomic to macroscopic scales to obtain intended material properties. Here, we propose a simple, mo…
Interface modification based on ultra‐thin mercapto‐propyl(trimethoxy)silane (MPTMS) films is shown to promote joining of copper and aluminum by plastic deformation followed by a heat treatment. The surface morphology and the surface chemistry of the metal substrates were analyzed by means of FE‐SEM, XPS, and FT‐IRRAS…
Abstract Ca 0.5 Zr 2 (PO 4 ) 3 and Ca 0.45 Eu 0.05 Zr 2 (PO 4 ) 3 nanophosphors have been synthesized by a sol–gel process under acid and basic conditions. In order to achieve the reduction of Eu 3+ to Eu 2+ , europium-doped samples were treated in a reducing atmosphere flow. The effects of the different synthesis con…
Understanding the molecular mechanisms which nature uses to control biomineral growth is a fundamental science goal with profound medical implication. In the case of calcium oxalate, a microscopic understanding of the interactions which regulate the growth and stabilization of metastable phases would permit to inhibit…
We report on the graphene-seeded growth and fabrication of photosensitive Cadmium telluride (CdTe)/graphene hybrid field-effect transistors (FETs) subjected to a post-growth activation process. CdTe thin films were selectively grown on pre-defined graphene, and their morphological, electrical and optoelectronic proper…
The development of a dedicated small-angle X-ray scattering setup for the investigation of complex fluids at different controlled shear conditions is reported. The setup utilizes a microfluidics chip with a narrowing channel. As a consequence, a shear gradient is generated within the channel and the effect of shear ra…
Dimer fatty acids demonstrate interesting raw materials for the synthesis of polyamides and polyurethanes. The industrially well‐established procedure of dimerizing poly unsaturated fatty acids yields a mixture of monomer, dimer and trimer structures, requiring the isolation of the pure dimer fatty acid. Within this s…
Nonplanar conformations of pyrazine-fused Zn(II) diporphyrins could be controlled by the choice of the meso-aryl substituents and an axial ligand on the central metals. Zn(II) diporphyrins bearing sterically demanding meso-aryl groups with ortho-substituents led to a twisted chiral D2 conformation, while an achiral C2…
A novel homologous series of hydrogen-bonded liquid crystals (HBLC) have been investigated. These Hydrogen bonds are formed between p-n dodecane dicarboxylic acid (DDC) and various p-n-alkyl benzoic acids (nBA), the present homologous series is referred as DDC + nBA. Seven complexes formed in the present homologous se…
The solid–liquid solubility of the title compound has been measured by a gravimetric method in five pure organic solvents over the temperature range (283 to 323) K. The melting temperature and associated enthalpy of fusion have been determined by differential scanning calorimetry (DSC), and the heat capacity of the so…
A system-level electromagnetic-mechanical-thermal multifield coupling model of a giant magnetostrictive transducer is proposed based on the thermodynamic theory, Jiles-Atherton model, energy balance principle, and structural dynamics principle of the transducer system. The model includes the electromagnetic-mechanical…
Amino acid-dithiocarbamate (amino acid-DTC) was developed as both the reductant and ligand stabilizer for biomimetic synthesis of gold nanoparticles (AuNPs), which served as an excellent surface-enhanced Raman scattering (SERS) contrast nanoprobe for cell imaging. Glycine (Gly), glutamic acid (Glu), and histidine (His…
We develop a scheme based on a real space microscopic analysis of particle dynamics to ascertain the relevance of dynamical facilitation as a mechanism of structural relaxation in glass-forming liquids. By analyzing the spatial organization of localized excitations within clusters of mobile particles in a colloidal gl…