Materials Literature
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The effect of manufacturing errors on diffraction efficiency for multilayer diffractive optical elements (MLDOEs) used in imaging optical systems is discussed in this paper. The relationship of diffraction efficiency and depth-scaling errors are analyzed for two different cases: the two relative depth-scaling errors c…
The short-time mutual diffusion at an interface of linear polystyrene/linear deuterated polystyrene with different molecular weights was examined by time-resolved neutron reflectivity (TR-NR) measurements. The model scattering length density ( b / V ) profiles obtained by solving a partial differential equation for th…
Single-walled carbon nanotubes (SWNTs) have shown promise for use in organic electronic applications including thin film transistors, conducting electrodes, and biosensors. Additionally, previous studies found applications for SWNTs in bioelectronic devices, including drug delivery carriers and scaffolds for tissue en…
The preparation of neutral red covalently-functionalized graphene nanosheets (NR-FGN) is presented via replacement of the carboxyl acid groups at the edges of graphene nanosheets using NR. The obtained NR-FGN was characterized by UV-vis, Fourier transform infrared (FT-IR), Raman spectroscopy, X-ray diffraction (XRD) a…
The development of the gas turbine engine over the past 60 years has been mirrored by the success of the titanium industry, with a clear symbiant relationship existing between the two industries. Immediately apparent in the early days of the evolution of the gas turbine was the need for a material which could provide…
We present an experimental study on mixtures of the gibbsite platelets and silica nanospheres of the same charge sign. In these mixtures the spheres act as depletants changing the phase behaviour of the platelet system, for which two very different time scales can be distinguished. At short times as a result of a stro…
Superhydrophobic electrospun polyacrylonitrile nanofibre membranes have been prepared by surface coating of silica nanoparticles and fluorinated alkyl silane. The coated membranes were characterised by scanning electron microscopy, water contact angle, thermogravimetry analysis, Brunauer–Emmett–Teller, Fourier transfo…
Energy dispersive X-ray microanalysis of micron-sized inclusions in steel is of considerable industrial importance. Measured spectra and Monte Carlo simulations show a significant effect of the steel matrix on analysis of CaO-Al(2)O(3)-MgO inclusions: the steel matrix filters the softer (Al and Mg) characteristic X-ra…
Abstract The electrical properties in polymer/carbon nanotube (CNT) nanocomposites are governed not only by the degree of dispersion but also to a greater extent on the aspect ratio of the CNTs in the final composites. Melt‐mixing of polymer and CNTs at high shear rate usually breaks the CNTS that lowers the aspect ra…
The nano-crystalline BiFeO3 were prepared under controlled substrate temperature by spray pyrolysis method. Their structural, optical and electrical properties were studied and correlated. A blueshift (Δλ ∼ 8.17 nm) in the absorbance peaks was observed in the films with decrease in grain size. The absorption coefficie…
Abstract Kolloidale anorganische Nanokristalle bestechen durch chemische Eigenschaften, die im Synthesestadium flexibel über Größe, Form und passend zugeschnittene Zusammensetzungen einstellbar sind, und eine Einsetzbarkeit in einem weiten Bereich technischer Anwendungen, angefangen mit der Optoelektronik, über die En…
Carrier depletion and transport in a single ZnO nanowire Schottky device have been investigated at 5 K, using cathodoluminescence measurements. An exciton diffusion length of 200 nm has been determined along the nanowire axis. The depletion width is found to increase linearly with the reverse bias. The origin of this…
Ozonation of two commercial carbon blacks (CBs), Printex 90 (P90) and Flammruss 101 (F101), was carried out and changes in their morphology, physical properties, and cytotoxicity were examined. The hypothesis examined was that different methods of manufacture of CBs influence their chemical reactivity and toxicologica…
This study was designed to investigate the ability of single- and multi-wall carbon nanotubes (CNTs) as an ultraviolet radiation absorber for cotton fabric finishing. The results were compared with the traditional nano- and micro-mineral UV absorbers of ZnO and TiO2 as well as chemical UV absorber Ciba Fast W. The per…
We report on the coalescence of a two-dimensional (2D) chain of La@C(82) metallofullerene molecules encapsulated inside a single-wall carbon nanotube (SWNT). 2D packing of metallofullerenes is known to adopt a zigzag arrangement and cause elliptical distortion to the cross-section of the SWNT host. We show that after…
A convenient and simple route to multifunctional surface coatings via the alternating covalent layer-by-layer (LBL) assembly of p-nitrophenyloxycarbonyl group-terminated hyperbranched polyether (HBPO-NO(2)) and polyethylenimine (PEI) is described. The in situ chemical reaction between HBPO-NO(2) and PEI onto aminolyze…
We have demonstrated a facile protocol for the synthesis of CuS cages wholly exposed with nanotwinned building blocks via a sacrificial Cu2O template solution route. The as-prepared CuS cages exhibit higher photocatalytic activity for enhancing degradation of methylene blue.
The phase diagram (critical temperature and compensation temperature) and the total magnetizations in a nanoscaled transverse Ising thin film with thickness L and a negative interlayer coupling at the surfaces are investigated by the use of both the effective-field theory with correlations and the mean-field theory. P…
A polymer-stabilized blue phase liquid crystal is one of the candidates for the next-generation display material. In this study, effects of monomer/liquid crystal compositions on electro-optical characteristics of polymer-stabilized blue phase liquid crystals were investigated. By optimizing monomer/liquid crystal com…
We have investigated spin-wave excitations in a four-sublattice (4SL) magnetic ground state of a frustrated magnet CuFeO${}_{2}$, in which ``electromagnon'' (electric-field-active magnon) excitation has been discovered by recent terahertz time-domain spectroscopy [Seki et al., Phys. Rev. Lett. 105, 097207 (2010)]. In…