Materials Literature
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The short range structure of (CaO)(0.5)(P(2)O(5))(0.5) glass has been studied using x-ray and neutron diffraction and modelled using the reverse Monte Carlo method. Using this combination of techniques has allowed six interatomic correlations to be distinguished and fitted to obtain a set of bond lengths and coordinat…
A strategy for preparing peptide-based magnetic resonance contrast agents with multiple gadolinium chelates is described.
A quantitative study using laser confocal microscopy combined with differential interference microscopy on the kinetics and thermodynamics of the crystallization of glucose isomerase is presented. Fundamental crystallization parameters are determined from the kinetics of step advancement and rates of two-dimensional (…
Dendritic magnetite crystals were fabricated by a surfactant-assisted hydrothermal method. The phase purity and composition of the dendrites were characterized by Mössbauer spectroscopy and X-ray diffraction (XRD), respectively. The morphology of the dendrites was measured by scanning electron microscopy (SEM) images.…
A p-type phosphorus-doped ZnO film (ZnO : P) was grown on a quartz substrate by sputtering a ZnO target mixed with 2 wt% P 2 O 5 using a mixture of Ar and O 2 and then annealed rapidly at 750 °C for 5 min in air ambient. The lattice constant of the c -axis was 0.5176 nm, smaller than the value of 0.5211 nm of pure ZnO…
The dimeric, sandwich-type tungstophosphate [{PhSbOH}(3)(A-alpha-PW(9)O(34))(2)](9-) (1) has idealized D(3h) symmetry and represents the first organoantimony-containing polyoxometalate. Polyanion 1 was synthesized in an aqueous, acidic medium via three different routes and was fully characterized in the solid state by…
This paper reports the size-exclusion properties of nanoporous films derived from polystyrene-poly(methylmethacrylate) diblock copolymers (PS-b-PMMA) for biomacromolecules. These properties were assessed by measuring cyclic voltammetry of ferritin (12 nm in diameter) adsorbed onto recessed nanodisk-array gold electrod…
Hydrothermal reactions of cadmium(II) or manganese(II) salts with aryl arsenic acids RAsO(3)H(2) (R = C(6)H(5)-, H(2)L(1); 3-NO(2)-4-OH-C(6)H(3)-, H(3)L(2)) and 1,10-phenanthroline (phen) led to six new cadmium(II) and manganese(II) organo arsonates, namely, Cd(phen)(HL(1))(2)(H(2)O) (1), M(phen)(H(2)L(2))(2) (M = Mn,…
In order to explore the novel application of boron nitride nanotubes (BNNTs), we investigate reactivities of pristine and silicon-doped (Si-doped) (8,0) single-walled BNNTs towards the CO molecule by performing density functional theory calculations. Compared with weak physisorption on the pristine BNNT, the CO molecu…
Fine-grained binary PbTe thermoelectric materials have been fabricated by a combination of a reflux chemical synthesis and hot pressing. The grain sizes of the hot pressed bulk samples varied from 200 to 400 nm, which significantly contributed to the thermal conductivity reduction due to the enhanced phonon scattering…
Using polarizing optical microscopy we studied thin films and droplets of smectic- A 4-cyano- 4;{'} -n-octylbiphenyl (8CB) liquid crystal deposited in air on crystalline surfaces of muscovite mica that induce monostable planar anchoring. The competition with the homeotropic anchoring at the 8CB-air interface leads to…
Binary polymer brushes with hydrophobic/hydrophilic behavior are forming a two-layer system with a collapsed hydrophobic and a swollen hydrophilic phase. The process of switching upon sudden change of the solvent quality is analyzed in detail for various solvent selectivities, chain lengths, and grafting densities. Th…
Recent magnetic measurements at La0.67Ca0.33MnO3/YBa2Cu3O7 interfaces led to conflicting interpretations: a magnetic "dead" layer on the LCMO side or antiparallel Cu and Mn magnetic moments. Here we report results of first-principles density-functional calculations of position-dependent magnetic couplings between inte…
The equilibrium and flow properties of a polymer liquid confined in a brush-coated channel are studied by molecular dynamics simulations using a dissipative particle dynamics (DPD) thermostat. We focus on the regime of high-grafting density, where the brush progressively becomes a stiff and smooth, soft surface and la…
Superhydrophobic and also highly transparent coatings can be prepared by a sol-gel dip-coating method. Polystyrene spheres (PSs) are used as a removable template and the coatings have a volcano-like micro/nano structure. The micrometer-sized pinnacles form by the assembly of PSs and silica particles, whereas the nanom…
A facile method for rapid fabrication of micrometre-thick films with hierarchical micro- and nanostructures was developed by layer-by-layer (LbL) deposition of hydrogen-bonded complexes of poly(vinylpyrrolidione) (PVPON) and poly(acrylic acid) (PAA) (denoted PVPON&PAA) with poly(methacrylic acid) (PMAA). FT-IR spectro…
A colloidal seeded-growth strategy, relying on time-programmed delivery of selected stabilizing surfactants, has been developed to synthesize bimagnetic hybrid nanocrystals (HNCs) that consist of a single-crystal tetrapod-shaped skeleton of ferrimagnetic (FiM) iron oxide functionalized with multiple polycrystalline sp…
Four homologous dyads with a phenothiazine donor, rigid variable-length p-xylene bridges, and a ruthenium(II) tris(2,2'-bipyridine) acceptor were synthesized. Photoexcitation of these donor-bridge-acceptor molecules in the presence of excess methylviologen generates a highly oxidizing Ru(III) intermediate, which trigg…
The electro-optical response and the microstructure of multiwalled carbon nanotubes dispersed in nematic liquid crystals with negative dielectric anisotropy are investigated. In contrast to undoped liquid crystals, the liquid crystal dispersions of carbon nanotubes are characterized by the irreversible electro-optic r…
We newly prepared liquid crystalline (LC) polymer brushes containing an azobenzene (Az) mesogenic moiety on a quartz or silicon substrate by surface-initiated atom transfer radical polymerization (ATRP). The grafted chain length was controlled by polymerization time and initial monomer concentration. The grafted chain…