Materials Literature
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In this paper, HZSM-5 zeolites were modified by aluminium nitrate using the method of impregnation. And the catalytic performances of samples on alkylation of phenol with isopropanol were reviewed. Results show that: after modified with aluminium nitrate, selectivity to o-isopropylphenol was increased and p-isopropylp…
In this paper a comparison between two active power filters is presented; both filters, the ARD and the HVC, are used for the active resonance damping in a distribution line. The ARD is an active power filter whose control strategy is typical for the resonance damping so that the harmonic voltage compensation is a wel…
Nanosized titanium dioxide particles doped with rare earth element cerium were prepared by sol-gel method. Particle size and photocatalytic activity was characterized by X-ray Diffraction and Ultraviolet-visible light spectroscopy. Treatment of Methyl orange wastewater using prepared TiO2photocatalyst was studied and…
The degradation of bearing preload and the creep of magnetic steel properties are the main degradation causes of inertial platform systems heading sensitive drift, gyroscopes installation error and other system parameters in the long-term storage conditions. Combining the bearing preload theory and magnetic steel prop…
For shaping a beam of millimeter-wave reflectarrays arbitrarily, this paper proposes a directivity synthesis based on the algorithm of the phase-retrieval method. The unknown phase distribution is numerically determined from an illumination distribution on the aperture and a desired beam pattern by iterative approach.…
Zn nanoparticles at room temperature show two absorption peaks in the near-infrared (NIR) and the ultraviolet (UV) regions, both of which satisfy the criterion of surface plasmon resonance (SPR). From X-ray diffraction at high temperatures, it was found that the Zn nanoparticles in SiO2melt at 360-420°C and solidify a…
There is an ongoing need in the microelectronics industry to increase circuit density in multilevel back-end-of line (BEOL) interconnects to improve the operating speed and reduce power consumption. One way to maintain capacitance-resistance (RC) performance, without de grading yield or reliability is through introduc…
This paper addresses the simulation of carbon nanotube interconnects with the inclusion of the effects of parameter uncertainties due to the fabrication process. The proposed approach is based on the available state-of-the-art models of nanointerconnects and on the expansion of the voltage and current variables in ter…
A facile mercury (II) ions absorbent was prepared by surface sol-gel process and functionalized monolayers treatment using filter paper as supports. The resulting functionalized monolayers on filter paper-silica gel composites supports remained the original complex morphology of filter paper and its filterable charact…
High surface area activated carbon (AC) obtained by KOH activation was pulverized by ultrasonic air-jet pulverization equipment and the effect of particle size of AC on rate performance of electric double layer capacitors (ECs) was investigated by electrochemical impedance spectrometry using an equivalent circuit mode…
Langatate (LGT) is a member of the langasite family of crystals appropriate for high-temperature frequency control and sensing applications. This paper identifies multiple LGT SAW orientations for use at high temperature, specifically in the 400 to 900°C range. Orientations with low sensitivity to temperature are desi…
Surface plasmon polaritons (SSP), moving along a smooth curved interface between two isotropic media with slowly varying dielectric permittivities and magnetic permeabilities and supporting SSP, are studied theoretically. Solutions of Maxwell equations are investigated within a small wavelength limit in the boundary l…
Lead free piezoelectric ceramics of (1-x)Bi0.5K0.5TiO3-xBaTiO3(BKT-BT) were fabricated by the solid state reaction method with normal sintering. The influence of BT addition on the crystal structure, phase transition and dielectric properties was investigated. The crystal structure and ferroelectric phase transition w…
A simple MEMS technology for wafer-scale integration of tunable VCSELs is presented. The tunable VCSEL is composed of a "half-VCSEL", which is a VCSEL without top distributed Bragg reflector (DBR), and an external mirror, which is a micromachined membrane ("MEMS")The GaAs-based half-VCSEL comprises a bottom DBR, an ac…
Control of epitaxial crystal growth orientation and diameter of Si nanowires were accomplished using anodic aluminum oxide (AAO) template formed on Si substrates. Vapor-Liquid-Solid (VLS) growth of Si nanowires was initiated on the size-controlled Au catalyst electrodeposited in AAO, and growth direction of nanowire w…
Many applications -like spectroscopy- require spectral filtering, commonly achieved using Fabry-Pérot stacks. These can be designed to fulfill varying requirements (central wavelength, bandwidth and rejection). However, practical fabrication of the stack imposes some limitations. Indeed, reducing the bandwidth require…
In order to produce kiwifruit juice, by single factor and orthogonal test, according to the juice yield, preservation rate of Vc, changes of juice color and aroma as the index, using pectinase and pulp enzyme dealed with kiwi fruit pulp to explore a better technology. The results showed that two enzymes both could imp…
Finite volume scheme on unstructured meshes is applied to evaluation of optical properties of photonic crystal waveguides with a bend. Reflection and transmission coefficients are studied for a range of frequencies inside the photonic crystal bandgap for different bend configurations. Frequencies and configurations fo…
A novel NOR Flash cell with a build-in 2-bit capability consisting of two physically isolated ONO charge-storage nodes separated by an oxide dielectric in between over the channel region is demonstrated. This memory cell employs the virtual ground array architecture, much like NROM arrays, is sensed with the reverse r…
Understanding the mechanisms underlying different cellular signaling pathways implicated in the pathogenesis of cancer are leading to the identification of novel drug targets as well as novel drug candidates. Multiple targeted therapeutics that modulate aberrant molecular pathways have already reached the clinic. Howe…