Materials Literature
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We have performed an ab initio study of structural, electronic, vibrational, and superconducting properties of Cr3RhN. The calculations have been carried out by employing the density functional theory, a linear-response formalism, and the plane-wave pseudopotential method. A striking feature of the phonon spectra in t…
Baggy Bounds Checking is a backward-compatible defense against out-of-bounds errors. It is reported as being faster than any previous bounds checking tool. However, it enforces allocation bounds instead of object bounds and thus cannot detect memory errors that are in padding areas. In this paper, we present BBAC: a t…
The spectral and temporal characteristics of X-ray luminescence of composites consisting of microparticles of “heavy” components (oxides, fluorides, sulfates) and an organic polymer binder containing optically active impurities have been investigated. It has been found that, in the case of pulsed X-ray excitation of t…
Analytic estimates and numerical computations are carried out to test the concept of a laboratory experiment on the demonstration of a runaway electron (RE) avalanche and RE-induced air breakdown under high overvoltages. It is shown that the development of an RE avalanche is impossible under the conditions of the give…
Inherently, zirconium carbide (ZrC) suffers from low fracture toughness (~3 MPa*m1/2) and excessive porosity when sintered in vacuum. One way to improve ZrC’s sinterability and fracture toughness is the addition of binder metal or other carbides to increase densification. Using mechanical activated synthesis (MAS) to…
This paper reports the modeling of pressure waves from the explosive reaction of nano-thermites consisting of mixtures of nanosized aluminum and oxidizer granules. Such nanostructured thermites have higher energy density (up to 26 kJ/cm3) and can generate a transient pressure pulse four times larger than that from tri…
Abstract (Bis‐selenolato) and (bis‐tellurolato)diiron complexes [2Fe2E(Si)] were prepared and compared with the known (bis‐thiolato)diiron complex A to assess their ability to produce hydrogen from protons. Treatment of [Fe3(CO)12] with 4,4‐dimethyl‐1,2,4‐diselenasilolane (1) in boiling toluene afforded hexacarbonyl{μ…
Fulfilling need of compact, cheap and efficient antennas is immensely sought after by the technocrats. The patch antennas are providing necessary support as planar antennas for satellite and radar communications. The Left Handed Materials, Metamaterials, allows us to tweak the properties of electromagnetic waves and h…
The structural instability of SrTiO3 at T S = 105 K is reinvestigated experimentally and theoretically by birefringence measurements and within the self-consistent phonon approximation. Analogous to BaTiO3 the phase transition shows precursor dynamics starting approximately 60 K above the phase transition temperature.…
The results of experimental studies of the decomposition of the solid solution in cast and microcrystalline (MC) Al- X wt % Mg-0.22 wt % Sc-0.15 wt % Zr ( X = 0, 1.5, 4.5) aluminum alloys that were described in part I of this work are analyzed. The data on the electrical resistivity of the alloys are used to determine…
Abstract Cassava starch (ST)–konjac glucomannan (KGM) blend films were prepared, characterized, and their suitability as matrices for the sustained release of a model drug, theophylline (Thp) was investigated. Structural studies showed that there was a good compatibility between ST and KGM and also revealed the existe…
The Gaerttner Laboratory electron linear accelerator at Rensselaer Polytechnic Institute was used in the measurement of the neutron total cross section of natural beryllium and carbon (graphite) in the energy range of 0.4 to 20 MeV. Neutron transmission measurements were made using the time-of-flight method with a 100…
Synthesis of gold nanoparticles using cefopernazone as a stabilizing reagent for a sensor was proposed. The gold nanoparticles were characterized by scanning electron microscopy, transmission electron microscopy, infrared spectrometry, ultraviolet- visible spectrophotometry, powder X-ray diffraction and cyclic voltamm…
Analysis of laser assisted frit sealing processes for high CTE > 5x10 -6 /C (coefficient of thermal expansion) glasses was done. The method is based on the thermal fusion of two glasses with a low melting point glass frit. This method is used when thermal sensitive materials such as OLED (organic light emissive device…
The electronic structure of quaternary natural minerals PbBi 2 Te 2 S 2 (aleksite), Pb 2 Bi 2 Te 2 S 3 (saddlebackite), and PbBi 4 Te 4 S 3 ( C phase) has been theoretically studied. These compounds have a layered structure: aleksite and saddlebackite are formed by seven- and nine-layer blocks, respectively, and C pha…
We conduct a systematic investigation into the mechanism of hole collection in amorphous/crystalline silicon heterojunctions solar cells using transient-capacitance techniques. The devices are formed by depositing undoped amorphous silicon (i layer) followed by p-type amorphous silicon on n-type crystalline silicon wa…
The fuel cell sector faces a fundamental problem that must be addressed urgently: the absence of basic research on fuel cell technology . This article, based on my recently published book – Fuel Cells: Current Technology Challenges and Future Research Needs – provides the rationale for this ambitious research. And pol…
In mass manufacturing of optical fibers, the wet-on-wet polymer resin coating is an efficient process for applying double layer coatings on the glass fiber. This paper presents an analytic study on the behavior of non-Newtonian polymer resins in the double layer coating liquid flow inside a secondary coating die of th…
In this work, a selective catalyst of BXE ALKCAT zeolite has been developed with about 30 % of ZSM-5 balanced with kaolinite, and applied for gas-phase alkylation of benzene (BZ) with ethylene (E). The catalyst has been tested in a fixed-bed down-pass flow reactor under different conditions of temperatures ranging bet…
The general framework of the origin of life on Earth is outlined, emphasizing that the so-called prebiotic 'RNA world' is as yet on shaky scientific ground, and that one should any way ask the question of the structure of the first protocellular compartments capable of the initial forms of metabolism. This question is…