Materials Literature
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We present a method for treating birefringent effects in layered media and apply the formalism to analyze reflectance from a multilayer one-dimensional (1D) porous silicon (PS) structure at off-normal incidence. The approach is to characterize the fields in terms of s- and p-polarized amplitudes in each layer, and the…
Abstract Tensile experiments on micro-sized polycrystalline copper wires with diameters ranging from 14 μm to 50 μm were performed using a recently developed fibre tensile module capable of high accuracy and flexibility. This module is able to fit into a scanning electron microscope for in-situ deformation studies. In…
This paper demonstrated covalent functionalization of surface -COOH groups on cylindrical nanopores derived from a polystyrene-poly(methylmethacrylate) diblock copolymer (PS- b-PMMA) via amidation mediated by 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC). The surface functionalization led to conversion of the su…
We report theoretical investigations of the quantized spin-Hall conductance fluctuation of graphene in the presence of disorder. Two graphene models that exhibit the quantized spin-Hall effect (QSHE) are analyzed. Model I is with unitary symmetry under an external magnetic field B not = 0 but with a zero spin-orbit in…
Systems of solid solutions Bi1 − x Ca x FeO3 (I) and Bi1 − x CaxFeO1 − x Ti x O3 (II) have been obtained and their properties have been studied using neutronography and Mössbauer spectroscopy; magnetization and permittivity have been measured. It is shown that an increase in the concentration of calcium ions in system…
The growth of graphene on the silicon-terminated face of 6H-SiC(0001) was investigated by scanning tunneling microscopy (STM) measurements. The initial stages of ultrahigh vacuum graphitization resulted in the growth of individual graphene sheets on random SiC terraces. These initial graphene sheets contained few defe…
Peptide self-assembly on substrates is currently an intensively studied topic that provides a promising strategy for fabrication of soft materials and is also important for revealing the surface chemistry of amyloidogenic proteins that aggregate on cell membranes. We investigated the fibrogenesis of a beta-sheet formi…
Periodic mesoporous organosilicas incorporating diethylbenzene bridges in their pore walls were applied for the adsorption of nitroenegetic targets from aqueous solution. The materials were synthesized by co-condensing 1,4-bis(trimethoxysilylethyl)benzene (DEB) with 1,2-bis(trimethoxysilyl)ethane to improve structural…
Tetrahedral amorphous carbon (ta-C) films with many superior properties approaching those of diamond crystal were prepared using filtered cathodic vacuum arc technology. To ascertain the sp3-rich deposition condition, the dependence of the film microstructure on the deposition energy was investigated by means of visib…
A new production technology for magnesium strip, based on twin-roll-casting and strip rolling was developed in Freiberg Germany. By means of this economic method it is possible to produce strips in deep drawing quality with good forming properties in order to satisfy the request for low cost Mg sheets in the automotiv…
A new method of utilizing a commercial silicon nitride membrane calorimeter to measure the latent heat at a first order phase transition is presented. The method is a direct measurement of the thermoelectric voltage jump induced by the latent heat, in a thermally isolated system ideally suited for single crystal and s…
Luminescence data offer delicate probes of changes in structure and local environment in insulating materials. Therefore they have long been employed in studies of imperfections and characterisation of lattice distortions. Luminescence techniques are inherently very sensitive so respond to small concentrations of intr…
Five new d 8 and d 10 metal complexes, Pd(8-hq) 2 ( 1 ), [Ag(8-Hhq) 2 ]NO 3 ( 2 ), Ag(8-hq)(8-Hhq) ( 3 ), [(8-H 2 hq) 2 PdCl 4 ]·2H 2 O ( 4 ), and Pt(8-hq)(tht)Cl ( 5 ) (tht = tetrahydrothiophene), all with a fluorogenic chelating agent, 8-hydroxyquinaldine (8-Hhq), have been synthesized and characterized. The aggrega…
A group of ferrocene-containing poly(phenylacetylene)s (PPAs) with different alkyl spacers were synthesized by using organorhodium complexes [Rh(diene)Cl](2) and Rh (+)(nbd)[C(6)H(5)B (-)(C(6)H(5))(3)] as catalysts. With the aid of pi-pi interactions between the walls of carbon nanotubes (CNTs) and the PPA skeleton to…
Environmental Transmission and Scanning Transmission Electron Microscopy (R Sharma) In-Situ High-Resolution Observation of Solid-Solid, Solid-Liquid and Solid-Gas Reactions (H Saka) Atomic-Scale, In-Situ Studies of Solid-State Reactions (J L Hutchison) Functionality and Dynamical Properties of Metal Nanoclusters (J T…
A new three-dimensional (3-D) open-framework vanadium (IV) borophosphate, Na 2 [VB 3 P 2 O 12 (OH)]·2.92H 2 O (denoted as VBPO-CJ27), has been synthesized by using boric acid flux method. Single-crystal structure analysis reveals that its structure is constructed by the connection of VO 6 octahedra, PO 4 and BO 4 tetr…
and NaOH solutions. The ZnO films were characterized in terms of surface morphology by x-ray diffraction, energy-dispersive x-ray analysis (EDX), the use of a scanning electron microscope (SEM) and atomic force microscope (AFM) for surface morphology. The films exhibited a smooth morphology. The chemical states of oxy…
In this paper we extend our previous experimental work on interaction between polyelectrolytes and liposomes. First, the adsorption of chitosan and alkylated chitosan (cationic polyelectrolytes) with different alkyl chain lengths on lipid membranes of liposomes is examined. The amount of both chitosans adsorbed remain…
BaTiO 3 films were grown on highly dense CoFe2O4 ceramics via pulsed laser deposition. Microstructural characterization showed that polycrystalline BaTiO3 thin films with grain size of about 70 nm were grown on the CoFe2O4 ceramics. BaTiO3 films showed good ferroelectric feature. An obvious magnetoelectric response, w…
We report synthesis, optical absorption and luminescence spectroscopy of Ni +7 ion irradiated ZnS semiconductor quantum dots over coated with Silica (SiO 2 ) embedded in PVA matrix. Quantum dot samples are prepared via Chemical route. 100 MeV Nickel ion is selected for the irradiation experiment with different doses o…