Materials Literature
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The binary glass system of (TeO2)x (B2O3)1-x with x= 60 to 80 mol% were synthesized by rapid quenching method. Longitudinal and shear ultrasonic velocity were measured at room temperature and at 5 MHz frequency. Elastic properties, Poisson’s ratio and micro hardness have been calculated from the measured density and u…
Optomec's patented Aerosol Jet technology is a maskless, non-contact material deposition system used to enable 3-dimensional semiconductor packaging. This presentation highlights results of printing high density, 3-D interconnects on stacked die modules which incorporate video, communication and memory chips. Such pac…
Article Two-dimensional Numerical Simulations of Nonlinear Ultrasonic Propagation in Bubbly Liquids was published on December 1, 2010 in the journal International Journal of Nonlinear Sciences and Numerical Simulation (volume 11, issue 12).
In this review chapter, we introduce the recently developed Lattice Monte Carlo method for addressing and solving phenomenologically-based thermal diffusion problems especially for composite and porous materials. We describe in detail the application of this method to calculate effective thermal diffusivities and to d…
Combination of photodegradation and adsorption processes induces strong beneficial effects in removal of dyes. Addition of high adsorption capacity activated carbon to photoactive titanium dioxide in photodegradation of dyes improves the efficiency of dye mineralization. The present study involves the preparation of i…
We apply the recently introduced Silicon Nitride Thermal Oxidation (SiNTO) process for the industrial fabrication of silicon solar cells that feature a thermal oxide-passivated rear surface. The SiNTO process utilises a SiNX anti-reflection layer for masking the front side of the solar cell during the thermal oxidatio…
We describe in detail the different steps involved in the construction of a carbon nanotube field-effect transistor (CNTFET) based on a network of single-walled carbon nanotubes (SWCNTs), which can selectively detect human immunoglobulin G (HIgG). HIgG antibodies, which are strongly adsorbed onto the walls of the SWCN…
Nanoparticles containing cefoxitin (CEF) made of D,L-PLA (PLA) were designed by a multiple emulsion/solvent evaporation method. The particles were extensively evaluated in relation to morphology, encapsulation efficiency, drug-polymer interactions as well as in vitro drug release kinetics. Nanoparticles were spherical…
Mineralogy of clay fractions and characteristics of soils developed from granite-gneiss parent material of Yerpedu Mandal in Chittoor district of Andhra Pradesh were studied. The clay fraction of these soils exhibited the characteristic peaks of smectite, mica and kaolinite. Semi-quantification of clay fractions based…
In this research, we report the synthesis of ZnS nanocrystals with a size range of 1-10 nm in diameter with varying manganese (Mn) concentrations. Various samples of Zn1-x MnxS, with x = 0.0001, 0.007, 0.02, 0.03, 0.055, 0.09 and 0.13, have been prepared from a quaternary W/O microemulsion system. It is observed that…
Based on the geometric theory of concave grating, we deduce the mathematical expressions of the meridional curve, Sagittal curve and the relational expression for the holographic flat-field image concave grating. We also propose a new optimal method in all used range for correcting the meridional and sagittal aberrati…
In this paper the phase transition temperature of epitaxial ferroelectric thin film is analyzed and discussed systematically via the dynamic Ginzburg-Landau (DGL) equation by taking the effective interior stress, surface eigenstrain relaxation and depolarization field. When the thickness of ferroelectric film is chang…
Nanolaminates such as the Mn₊₁AXn (MAX) phases are a material class with ab initio derived elasticity tensors published for over 250 compounds. We have for the first time experimentally determined the full elasticity tensor of the archetype MAX phase, Ti₃SiC₂, using polycrystalline samples and in situ neutron diffract…
The propagation of shockwave in nanocrystalline copper has been studied by means of molecular dynamics simulation. The samples are prepared by Voronoi method and crystalline orientations of each grain are limited by three conditions. The result shows for the first time that nanocrystalline copper shows the phenomenon…
The indoor and outdoor radon/thoron progenies concentrations and natural background radiation levels throughout Sarawak and Sabah were measured. The measurements were carried out at 234 locations in 40 towns in Sarawak and Sabah. The mean indoor and outdoor radon equilibrium equivalent concentrations (EEC) in Sarawak…
This chapter contains sections titled: Introduction: Need for Fuel Cell Dynamic Models Nomenclature (PEMFC) PEMFC Dynamic Model Development PEMFC Model Structure Equivalent Electrical Circuit Model of PEMFC PEMFC Model Validation This chapter contains sections titled: References
Investigation into the effect of different acids used for coagulation of Natural rubber latex on PRI were carried out. Different concentrations of Formic, Acetic and Citric (lemon) acids were prepared and used to coagulate natural rubber latex. The coagulum were milled and dried. The plasticity retention index (PRI) t…
Some atmospheric depositions of zinc and iron in mining areas of Dorna Basin were investigated by passive monitoring with six species of bryophytes (Plagiomnium undulatum, Plagiomnium cuspidatum, Rhizomnium punctatum, Polytrichum strictum, Thamnobryum alopecurum and Polytrichum commune) in two periods: April -Septembe…
This paper is focused on the optimization of the rear contact scheme of p-type c-Si LFC-PERC high efficiency solar cells minimizing base ohmic losses without jeopardize rear passivation. This is carried out optimizing on one hand the LFC laser conditions for minimum point resistance and on the other hand through a pro…
The activation regime of a MgAl-LDH type catalyst is of of prime importance on its activity and selectivity in a acid-base catalyzed reaction, the aldol condensation between acetaldehyde and heptaldehyde. The optimal activation temperature was determined exprrimentally and comparisons were possible with the commercial…