Materials Literature
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Analysis of correlation between growth rates and interfacial structure of a crystal is the key to understanding the growth behavior of crystal faces. The subject of this paper is research on the morphological importance of crystal faces in connection with their growth rates and crystallographic structure of the crysta…
Poly(3-hydroxybutyrate-co-3-hydroxyoctanoate), PHBO, represents a class of PHA copolymers that contain both short-chain-length and medium-chain-length repeat units. Radiolabeled and cold PHBO, containing 90 mol % 3-hydroxybutyrate and 10 mol % 3-hydroxyoctanoate were chemically synthesized using a new difunctional alk…
In this paper we describe a new approach for the formation of nanoporous particles in which a thermally stable, water-soluble, and therefore easily leached second component is employed during spray pyrolysis to produce a composite particle. We demonstrate the new synthetic approach for synthesizing nanoporous aluminum…
The unique photochemical properties of TiO2 provides a stepwise approach for the easy and precise patterning of colloidal crystal films. In this approach patterns of hydrophobic and hydrophilic areas are formed on a TiO2 surface and then a colored film of monodispersed polystyrene spheres is deposited on to the hydrop…
This study describes the transformation of cellulose acetate filters into porous carbon structures by a facile, direct process. Filters from cigarettes were used as the source for cellulose acetate filters. Carbon was obtained by high-temperature treatment under inert conditions without extensive preparative methods.…
Die Materialwissenschaften zeichnen uns eine Zukunft, in der selbstreparierenden und intelligenten Materialien eine bedeutende Rolle zukommt. Dieses Konzept findet in den letzten Jahren durch eine neue Klasse von Polymeren stetig wachsende Beachtung. Die Formgedächtniskunststoffe, die in Anlehnung an den englischen Be…
A simple and efficient synthetic method for highly ordered nanoporous carbons with high mechanical and thermal stability has been performed through a direct template carbonization using as-synthesized MCM-48 hosts.
Large low-field magnetoresistance (LFMR) together with high Curie temperatures (TC) are requirements for some applications in magnetoelectronics. In order to optimize both parameters, we have investigated double perovskites (Ba0.8Sr0.2)2−xLaxFeMoO6 (0⩽x⩽0.4). High-temperature neutron diffraction measurements indicate…
Shape-persistent multi(NCN-palladium and/or -platinum) complexes having one- (5 and 6), two- (1 and 2), and three-dimensional (3 and 4) geometries were prepared in moderate to good yields. Two different approaches were used to construct the multimetallic materials: (i) the construction of the multisite ligands followe…
To develop biodegradable packaging that both acts as a moisture barrier and as antimicrobial activity, nisin and stearic acid were incorporated into a hydroxy propyl methyl cellulose (HPMC) based film. Fifteen percent (w/w HPMC) of stearic acid improved film moisture barrier. However, film mechanical resistance and fi…
Contact-induced damage has been studied in single-crystal (wurtzite) ZnO by cross-sectional transmission electron microscopy (XTEM) and scanning cathodoluminescence (CL) monochromatic imaging. XTEM reveals that the prime deformation mechanism in ZnO is the nucleation of slip on both the basal and pyramidal planes. Som…
Structural stability and bonding properties of the hydrogen storage material Mg(2)NiH(4) (monoclinic, C2/c, Z = 8) were investigated and compared to those of Ba(2)PdH(4) (orthorhombic, Pnma, Z = 8) using ab initio density functional calculations. Both compounds belong to the family of complex transition metal hydrides…
A controlled quenching process allows the nucleation period to be increased sufficiently, such that high-resolution transmission electron microscopy can be used to reveal the structural and shape transformations during the onset and development of mesophase ordering of the hexagonally ordered silica–surfactant mesopha…
Spheres without templates: The direct assembly of a complex inorganic polymer with a spherical-shell architecture (see electron microscopy image) was obtained by addition of polyacrylate or polyaspartate during the crystallization of octacalcium phosphate from aqueous solutions. The process does not require the interv…
A ternary microemulsion polymerization was successfully used to prepare nanosized hollow polystyrene (PS) microlatexes with triblock copolymers of poly(oxyethyene)−poly(oxypropylene)−poly(oxyethylene)[(EO) x (PO) y (EO) x ]. Micelle formation using triblock copolymers is a useful nanoreactor in order to make polymer n…
The Langmuir-Blodgett technique has been used to assemble one-dimensional nanoscale building blocks. Various superstructures can be obtained as a result of different interactions between the individual nanostructures and different surface pressure applied. The general assembly behavior is exemplified here with BaCrO4,…
The layer-by-layer assembly between cationic chitosan and anionic dextran sulfate was analyzed quantitatively by a quartz crystal microbalance technique in the absence and presence of 0.2, 0.5, and 1 M NaCl in the polymer solution. The apparent film thickness increased upon increasing the NaCl concentration. The anti-…
An aldopyranoside-based gelators (dodecanoyl-p-aminophenyl-beta-D-aldopyranoside)s and [1,12-dodecanedicarboxylic-bis(p-aminophenyl-beta-D-aldopyranoside)]s 1-4 were synthesized, and their gelation ability was evaluated in organic solvents and water. Simple aldopyranoside amphiphiles 1 and 2 were found to gelate organ…
Abstract The heat of fusion measured with differential scanning calorimetry (DSC) is typically divided by a constant value of the heat of fusion of 100% polyethylene (PE) crystal (Δ H ) for the estimation of the fraction crystallinity of PE copolymers, regardless of the density [i.e., the short‐chain branching (SCB) c…
<001> oriented 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 single crystals were poled under different electric fields, i.e. Epoling=4 kV/cm and Epoling=13 kV/cm. In addition to the temperature-dependent dielectric constant measurement, X-ray diffraction was also used to identify the poling-induced phase transitions. Results showed…