Inverted and Planar Carbon
This chapter contains sections titled: Introduction, Scope and Nomenclature Theoretical Considerations Preparative Chemistry and Properties Conclusion Acknowledgment References
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The Promise of Dielectric Nanocomposites
Several research groups worldwide have now been able to document some significant improvements that can be made in the electrical, and other, properties of polymer composites through the incorporation of nanoparticulates. Although it is now becoming clear that the mechanisms responsible for these changes are by no mea…
Spectroscopy of zigzag single-walled carbon nanotubes: Comparing femtosecond transient absorption spectra withab initiocalculations
Femtosecond transient absorption spectroscopy was applied to map out the electronic transition energies of a selected semiconducting zigzag carbon nanotube, the (11,0) tube. The experiment was performed by resonant excitation of the lowest electronic transition with spectrally narrow pump pulses, ensuring predominant…
Comparison of Support Vector Machine Based Partial Discharge Identification Parameters
Partial discharge (PD) may have a significant effect on the insulation performance of power apparatus. Therefore, identification of PD sources is of interest to both power equipment manufacturers and utilities. With the development of PD measurement techniques, data analysis, signal processing and pattern recognition…
Fickian crossover and length scales from two point functions in supercooled liquids
Particle motion of a Lennard-Jones supercooled liquid near the glass transition is studied by molecular dynamics simulations. We analyze the wave vector dependence of relaxation times in the incoherent self-scattering function and show that at least three different regimes can be identified and its scaling properties…
PbS microcrystals with a magic-square-like structure prepared by a simple hydrothermal method
PbS microcrystals with a magic-square-shaped structure were successfully fabricated via a simple hydrothermal route, employing (CH3COO)2Pb and Na2S2O3 as the lead and sulfur source without the assistance of any surfactant or template. S2O32- ions acted not only a supplier of S2- ions but also a coordinating reagent. T…
Application of UHF Diagnostics to Detect PD During Power Transformer Acceptance Tests
Different diagnostic techniques are currently available for on-line insulation condition assessment of power transformers. Amongst these techniques a relatively new technique for detecting partial discharges (PD) in the ultra high frequency range of the spectrum is also introduced. The UHF technique has been recently…
Mechanical and optical properties of AIIBIVC2V and AIBIIIC2VI semiconductors
Abstract A simple method based on a plasma oscillations theory of solids is proposed for the calculation of mechanical and optical properties such as microhardness ( H ), bulk modulus ( B ), dielectric constant ( ϵ ), polarizability ( α ), electronic susceptibility ( χ ) of A II B IV C 2 V and A I B III C 2 VI semicon…
Electric Field Computation in Water Treed Polyethylene with Space Charge Accumulation
Electrical degradation of the insulating systems of energy cables is close related to the water treeing and space charge development. In this paper the results of the calculations of the electric field repartition in the insulation of a medium voltage cable affected by water trees and their related space charge are pr…
Use of Nano-Silica in Silicone Rubber for Ceramic Insulators Coatings in Coastal Areas
Nano-silica and micro-silica particles were mixed with silicone rubber. The resulting materials were compared with respect to erosion damage in inclined plane, and surface roughness and contact angle of virgin samples. Results have shown that nano-silica filled room temperature vulcanized (RTV) silicone rubber (SR) ha…
Tight-binding calculations of the elastic constants and phonons of hcp Zr: Complications due to anisotropic stress and long-range forces
We have calculated the phonons and elastic constants of zirconium in the hexagonal-close-packed (hcp) crystal structure using the Naval Research Laboratory (NRL) empirical tight-binding (TB) approach; the tight-binding parameters are obtained by fitting to ab initio density-functional theory--generalized gradient appr…
Structure and Interconversion of Oxygen-Vacancy-Related Defects on Amorphous Silica
Atomic structure and structural stability of neutral oxygen vacancies on amorphous silica are investigated using combined Monte Carlo and density functional calculations. We find that, unlike their bulk counterparts, the Si-Si dimer configuration of surface oxygen vacancies is likely to be unstable due to the high ten…
Nucleation kinetics and growth aspects of semi organic non-linear optical bis thiourea cadmium acetate single crystals
Nucleation parameters such as metastable zone width, induction period and interfacial energy have been determined for the aqueous solution growth of bis thiourea cadmium acetate (BTCA) single crystals. Solubility of BTCA has been determined for various temperatures. Metastable zone width and induction period values ha…
Mode-dependent energy transmission across nanotube junctions calculated with a lattice dynamics approach
A generalized scattering boundary equation method (SBM) is proposed for the calculation of the vibrational amplitude transmission across solid junctions. An energy transmission expression with relation to atomic masses, lattice constants, and group velocities is elucidated. The phonon transmission is computed by the S…
Assessment of Osmotic Process in Combination with Coating on Effective Diffusivities during Drying of Apple Slices
The effect of carboxymethyl cellulose (CMC) coating on the mass exchanges during the osmotic dehydration of apples and its effect on the quality of final product were studied. Coating semi-rings of apple with CMC solution (1%) was found to prevent solute uptake and to reduce salt diffusion coefficient from 4.35 × 10−1…
Dielectric studies of metal complexes of thiourea crystals for electro-optic modulation
In the present study three crystals of thiourea family viz. Zinc Thiourea Chloride (ZTC), Zinc Thiourea Sulfate (ZTS) and Bisthiourea Cadmium Chloride (BTCC) were grown from aqueous solution by slow evaporation technique. The grown crystals were studied by powder XRD, FT-IR and UV-visible. The dielectric study of grow…
A Theoretical Characterization of Covalency in Rare Earth Complexes through Their Absorption Electronic Properties: f−f Transitions
Experimental uncertainties concerning the coordination mode of trivalent plutonium in concentrated LiCl have led us to theoretically evaluate the f-f transitions of a series of rare earth aquo and chloro complexes. The calculation of Pr(III), U(III), Np(III), and Pu(III) systems' spectra was undertaken using the LFDFT…
PM0.1 Emissions during Diesel Trap Regeneration
A nanostructured spinel-type oxide catalyst (CoCr2O4) prepared by solution combustion synthesis was developed and deposited over a SiC wall-flow trap for diesel particulate removal. Bench tests proved that, after soot loading, the developed trap enables a faster and more complete regeneration at 550 degrees C than a c…
Etching and dielectric studies on L-lysine monohydrochloride dihydrate single crystal
The nonlinear optical single crystals of L-Lysine monohydrochloride dihydrate (L-LMHCl) have been grown and examined by High-resolution X-ray diffraction and etching studies for their perfection. The vibrational frequencies have been identified by the micro-Raman studies and the dielectric behaviour has been studied a…
Toughness of Glassy−Semicrystalline Multiblock Copolymers
We report a study on the mechanical properties of lamellae-forming glassy−semicrystalline block copolymers composed of poly(cyclohexylethylene) (C) and polyethylene (E). Tensile properties of polydomain CEC, ECEC, CECEC, and ECECE block copolymers, and blends of these materials, reveal a critical dependence on the con…