Materials Literature
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High aspect ratio diamond nanocone arrays are formed on freestanding diamond film by means of focused ion beam (FIB) milling technology and hot-filament chemical vapor deposition (HFCVD) method. The structure and phase purity of an individual diamond nanocone are characterized by scanning electron microscopy (SEM) and…
Advanced thin dicing blades for cutting sapphire were fabricated and evaluated for cutting performance with respect to dicing blade wear and meandering of cutting lines. Three kinds of different commercial blades were used to compare the cutting performance. These blades had the same thickness and the same diamond gra…
NaxCoO2 material is of great interest because of its rich electronic phase diagram, as well as for displaying superconductivity when intercalated with water. This paper briefly reviews our research activity on its optical properties and a metamagnetic transition phenomenon.
Wireless sensor networks (WSN) play a significant role in environmental pollution control, for example, air pollution control. To become widely acceptable and commercially viable, miniaturization of WSN should be investigated. For this reason, CMOS implementation of sensors and their integration into WSN have drawn mu…
We have fabricated highly stable organic electroluminescent devices based on spin-coated poly-p-phenylene-vynylene (PPV) thin films. The electrical properties of aluminum cathode, prepared by ion beam assisted deposition, on PPV have been investigated and compared to those by thermal evaporation. Although energetic pa…
This review article summarizes briefly some important achievements of our recent reserach on anatase and/or rutile TiO2 thin films, fabricated by helicon RF magnetron sputtering, with good crystal quality and high density, and gives the-state-of-the-art of the knowledge on systematic interrelationship for fabrication…
The structural and electrical properties of infinite-layer CaCuO2 (IL CaCuO2) under high pressure at room temperature were studied using a diamond anvil cell by in situ high pressure energy-dispersive X-ray diffraction with synchrotron radiation and by simultaneous resistance and electrical capacitance measurements. T…
Using a π-orbital tight-binding model, we investigate the transport properties of a coiled carbon nanotube (also called carbon nanotube spring), which we construct by connecting carbon nanotubes periodically in three-dimensional (3D) space. The conductance is quantized due to the translational symmetry in the coiled d…
Much attention is being directed toward understanding and co-opting the mechanisms by which diatoms control patterning of silica for nanotechnology applications. Given the enormous diversity of cell-wall patterns among diatom taxa, a complete understanding of these mechanisms will require comparative analysis of nanop…
Preface (V. Galiatsatos). 1. Ab Initio Polymer Quantum Theory (B. Champagne). 2. Quantum-Chemistry-Based Force Fields For Polymers (G. Smith & O. Borodin). 3. Monte Carlo Simulations of Binary Polymer Liquids (M. Muller). 4. Mesoscopic Simulations of Polymer Mixtures (O. Evers). 5. Prediction of Mechanical Properties…
A marked increase of relaxivity has been observed upon rigidifying the internal frame of Gd-containing PAMAM dendrimers: the effect has been attained by either protonation of the dendrimer or by forming supramolecular adducts with cationic polyaminoacids.
We have applied the line patterning method, which involves printing of patterns on a plastic or paper substrate using a commercial printer followed by coating of the non-printed areas by a conductive polymer, or metal conductor, to build laterally configured polymer and metallic interdigitated electrodes (IDEs) for el…
Quantitative analysis of Raman spectra of vitreous or molten silicate is always one of the key subjects in some fields, e.g. materials science, geological physi cs, etc. But there are many difficulties with this analysis, one of which is the determination of Raman scattering coefficient. Not long ago, we developed a n…
Photoinduced anisotropy of a photochromic pyrrylfulgide/PMMA film was investigated by using two linearly polarized beams. Excitation by linearly polarized light induces into the film an optical axis that has the same polarization as the excitation beam. This causes a change of the transmittance and of the polarization…
This paper presents the application of a hybrid neuro-fuzzy system for the prediction of cotton yarn strength from HVI fibre properties. The proposed system possesses the advantages of both artificial neural networks and fuzzy logic, and is thus more intelligent. HVI fibre test results are used to train the neuro-fuzz…
A seven-step design process proposed by Watkins (1995) was used as a framework to guide the development of a one-piece female-specific sailing garment. An objective analysis of user needs uncovered through personal interviews and participant observation led to the development of design criteria based on the user need…
The influence of a left-handed medium (LHM) on the performances of a circular patch antenna is quantified numerically. For this, a homogenization procedure of the LHM is carried out in order to design the patch antenna at a suitable frequency where the losses of the LHM are low. From the first results obtained, it is…
Linter cellulose was oxidized with sodium hypochlorite with catalytic amounts of sodium bromide and 2,2,6,6-tetramethylpiperidine-1-oxy radical (TEMPO) under various conditions. After this TEMPO-mediated oxidation, fibrous water-insoluble fractions were collected, and characterized in terms of carboxyl and aldehyde co…
Magnesioferrite spinel, MgFe 2 O 4 , was synthesized at 900 °C from equimolar amounts of reagentgrade oxides, MgO and Fe 2 O 3 , and quenched in air. The structural behavior of magnesioferrite was determined from in situ synchrotron X-ray powder-diffraction data [λ = 0.92225(4) Å] at room pressure and temperatures fro…
PURPOSE: To investigate the difference in enhancement effects and relaxivities of the gadolinium chelate at 1.5 and 3 Tesla (T) and to elucidate the contribution of the high magnetic field to contrast enhancement in spin-echo (SE) and gradient-echo (GRE) images. METHODS: Phantoms containing water with or without gadop…