Materials Literature
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The doping effect of Cd ions on the giant dielectric response in Ca1−xCdxCu3Ti4O12 ceramics with x=0, 0.01, 0.03, 0.05 and 0.1 was studied in the frequency range of 10 kHz–1 MHz over the temperature range of 300–850 K. It is found that the chemical substitution of Cd ions at the Ca sites results in decrease in dielect…
Fundamental principles and p-i-n junction concept of organic solar cells are described. Methods for improvement of conversion efficiency such as nanostructure design of co-deposited i-layer and high-purification of organic semiconductors are explained. Conversion efficiency exceeding 5% was observed. Cell operation fo…
Iron oxide nanoparticles(Fe3O4NPs) have recently received increasing interest in the biotechnology and life science. However, little is known about the nanoneurotoxicity of Fe3O4NPs following exposure to neurons. This study was to elucidate the cytotoxicity and its mechanism of Fe3O4NPs on PC12 cells line which derive…
One-dimensional (1D) amorphous nanoblades were synthesized by a low-temperature hydrothermal process in an aqueous solution without using template. The presence of NaOH and urea is crucial for the formation of anisotropic nanostructures, but their concentrations should be carefully controlled to obtain large-scale nan…
This paper treats a band-broadening design technique of a dual-band branch-line coupler with matching networks composed of an impedance step and a short-circuited stub based on the equivalent admittance approach. By replacing each right-handed transmission line (RH-TL) with a composite right/left-handed transmission l…
Bulk heterojunction organic solar cells using blended poly (3‐octylthiophene‐2,5‐diyl)(P3OT) and (6,6)‐phenyl C71 butyric acid methyl ester (PC71BM) have been fabricated. P3OT and PC71BM were used as the electron donor (D) and acceptor (A), respectively. Both materials were mixed and dissolved in dichlorobenzene with…
We propose and demonstrate metamaterial immersion lenses (MILs) by shaping the interfaces of plasmonic metamaterials. The MILs can achieve super resolution and can be easily integrated with conventional optical systems.
Experiments have been conducted to investigate the fracture and fragmentation characteristics of a liquid phased sintered (LPS) tungsten and high strength steel alloys. Metal cylinders, each of which was 20.32 cm tall and 5.08 cm inner/5.88 cm outer diameter, were explosively driven to failure. Two complimentary types…
A nonlinear steady-state thermodynamic model was coupled with linearized dynamic transfer functions to achieve a dynamic description of the NETL HyPer Fuel Cell Gas Turbine (FC/GT) power plant. Nonlinear dynamic models insure accuracy in modeling steady-state behavior over a wide range of operation, but such models ar…
A granular system slightly below the percolation threshold is a collection of finite metallic clusters, characterized by wide spectrum of sizes, resistances, and charging energies. Electrons hop from cluster to clusters via short insulating “links” of high resistance. At low temperatures all clusters are Coulomb block…
Beta-tricalcium phosphate (β-TCP) has been used for bone regeneration in a variety of surgical procedures including dental implant therapy with satisfactory clinical results. However, very little is known about the molecular basis mechanisms enhancing the bone formation by β-TCP. To understand the molecular basis mech…
Selective deprotection of 4-(alkoxysilyl)benzaldehyde diethyl acetals 1a-1c in the two-solvent system of hydrochloric acid and chloroform gave 4-(alkoxysilyl)benzaldehydes 2a-2c in good yields. Under these conditions, undesired hydrolysis of the alkoxysilyl group was minimized. The reaction of benzaldehydes 2a and 2b…
A series of novel fluorinated copolyimides were synthesised with various diamine compositions by chemical imidisation in a two-pot procedure. The gas permeation behaviour of 2,2´-bis(3,4´-dicarboxyphenyl) hexafluoropropane dianhydride(6FDA)-2,4-diamine toluene(DAT)/1,3- phenylenediamine(mPDA) polyimides was investigat…
This paper proposes a thermo-mechanical orthogonal cutting finite element model (FEM) to investigate the variation of chip morphology from continuous chip to small and large saw-tooth chip. The corresponding experiments of hard turning AISI 52100 steel are conducted to validate the proposed FE model. Three one-factor…
A series of finite element thermoelectric coupling simulations on the Ti/Pt/Cr/Au thin film microheater array were conducted. The infrared image of the fabricated microheater device confirmed the simulation results. Based on these simulations, a microheater array was fabricated on Si/SiO2substrate, and carbon nanotube…
In this work we analyze the deposition process of (111)-textured Pb(Zr,Ti)O3 (PZT) thin perovskite films directly on copper-coated polymer films. Cu thin films with a thickness of about 200 nm were deposited by DC sputtering in a reel-to-reel processing system onto Kapton® HN films with a thickness of 25 m comprising…
The structure and magnetic properties of TbNi 2 Mn x compounds have been studied by the X-ray and neutron powder diffraction, magnetization and magnetostriction measurements. It was found that the compounds for x < 1 crystallize in a cubic MgCu 2 Laves phase structure, in spite of the R to 3d-metal ratio changes from…
Stoichiometric (1), Tl 2 S-enriched (2), and TiS 2 -enriched (3) Tl 4 TiS 4 crystals (with deviations from stoichiometry within the homogeneity range of the ternary compound) have been grown by the Bridgman method, and their thermoelectric properties have been studied by the Harman technique. All of the crystals have…
The main objective of this work was to develop fuel reforming technologies to produce a H2-rich synthesis gas to power a solid oxide fuel cell being developed by US DOE for applications like diesel auxiliary power units. In order to accomplish this objective the following efforts were required: 1) examination of the e…
A solution containing Cr(VI), Cr(NO3)3 and its complex with an organic acid as well as several commercial solutions containing Cr(III) complexes with an organic acid and additionally CO2+, F-, SO42- ions were used for the studies. Results of the studies obtained in the following commercial solutions: Likonda 2AT, Cr(N…