Materials Literature
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We experimentally demonstrate a structured thin film that selectively absorbs incident electromagnetic waves in discrete bands, which by design occur in any chosen range from near UV to far infrared. The structure consists of conducting islands separated from a conducting plane by a dielectric layer. By changing dimen…
Purpose – The purpose of this paper is to assess the serious corrosion problems of the water injection system on the offshore oil field and to study the type, and effect factors and mechanisms of corrosion on the offshore oil field in order to develop an effective corrosion inhibitor for the sea water injection system.
Abstract Purpose – The purpose of this paper is to develop an empirical equation of SRB corrosion based on their metabolic species. Design/methodology/approach – Solution containing SRB metabolic species was simulated using abiotic chemistry approach. Linear polarization technique was used to measure the corrosion rat…
In-doped tin pyrophosphate materials were synthesized with varying metal to phosphate ratios to assess the influence of an excess amorphous polyphosphate phase on conductivity. Total conductivity at 250°C increased with phosphorus to metal (P:M) ratio, with the 2.81 P:M ratio material exhibiting maximum conductivity o…
In this work a breakthrough in the field of low cost uncooled infrared detectors is presented: an 80x80 MWIR VPD PbSe detector monolithically integrated with the corresponding Si-CMOS circuitry. Fast speed of response and high frame rates are, until date, non existing performances in the domain of low cost uncooled IR…
Abstract Shape‐controlled iron oxide nanocrystals were prepared by using an ionic liquid‐mediated hydrothermal process. Different morphologies can be synthesised, such as cubes and porous nanotubes. Owing to the different morphologies developed, accessible surface area varies from a few m 2 g −1 to more than 50 m 2 g…
Self-consistent band calculations on four intermetallic compounds of the CsCl structure are presented. The calculations were performed employing the self-consistent ultrasoft pseudopotential method based on the density functional theory, within the local density approximation and the generalized gradient approximation…
The inhibitive effect of fructose, glucose, lactose, maltose, and sucrose against the iron corrosion is investigated using density functional theory at the B3LYP/6-31 G level (d) to search the relation between the molecular structure and corrosion inhibition. The electronic properties such as the energy of the highest…
ABSTRACT The work focuses on the synthesis and layer by layer (LbL) assembly of oligoallylamine and phosphonated oligoallylamine. To this aim, the synthesis of oligoallylamine and the phosphonated form have been done by free radical polymerization in aqueous media. First, radical polymerization of acid salt of allylam…
CdZnS quantum dots (QDs) with systematically varied Zn content (from 0 to 100%) are formed in an organic matrix using the Langmuir–Blodgett technique. Annealing of the QD structures leads to a removal of the organic matrix and an increase in the Zn content for free-standing CdZnS QDs. After annealing, the size of QDs…
Nanocrystals composed mainly of β-sheet polyalanine are responsible for the high toughness of major ampullate (dragline) spider silk. Fourier-transform infrared (FTIR) spectroscopy is employed to study their response to (i) uniaxial stress and (ii) hydrostatic pressure. In the former a red shift and in the latter a bl…
Uncooled infrared detectors with 12μm pixel pitch video graphics array (VGA) have been developed. To improve the signal to noise ratio (SNR) for 12μm pixel pitch, a highly sensitive bolometer material, an advanced pixel structure for thermal isolation and a newly designed read-out IC (ROIC) have been also developed. T…
We present a computational, atomistic electrodynamics investigation of the effects of planar defects on the optical properties of silver nanocubes, where the planar defects we considered are different surface orientations, twins, partial dislocations, and full dislocations. We find that for nanocubes smaller than abou…
This paper introduces a method of broadband absorption enhancement that can be integrated with the conventional suspended microbolometer process with no significant additional cost. The premise of this study is that electric field can be enhanced throughout the structural layer of the microbolometer, resulting in an i…
The segmental dynamics of a low glass transition temperature T g polymer under different conditions of morphological confinement are shown to manifest the influence of the frustration of the local “packing” of chain segments at interfaces of varying curvatures, unique to the morphology. Of particular interest are the…
We present scanning tunneling microscopy and spectroscopy studies around an individual excess Fe atom, working as a local perturbation, in the parent material of the iron-chalcogenide superconductor Fe${}_{1+\ensuremath{\delta}}$Te. Spectroscopic imaging reveals an isosceles triangular electronic structure around the…
The evolution of the crystalline morphology of two poly(propylene) films deformed in the rubbery state using wide‐ and small‐angle X‐ray scattering and extensional rheology experiments is presented. The mechanical behavior can be either isotropic or anisotropic depending on the manufacturing process. The microstructur…
Abstract A concise method for preparing five tetraazadioxaacene derivatives through condensation reactions between 2,3,7,8‐tetraaminodibenzo‐1,4‐dioxin tetrahydrochloride and commercially available diketones has been developed. The as‐prepared compounds have interesting photophysical and electrochemical properties. Cy…
In the frame of thermodynamic approach, it is shown that all the admissible values of the d33, d32, and d31 piezoelectric moduli of any orthorhombic (mm2) single crystal in the 3-dimensional (d33, d32, d31) space lie within a restricted area having the form of ellipsoid. The main parameters of this ellipsoid (the aspe…
The glass–ceramics containing a rarely achievable nanocrystalline Sr II Nb IV O 3 phase in the 53.75 SiO 2 –18.25 K 2 O –9 Bi 2 O 3 –9 SrO –9 Nb 2 O 5 –0.5 CeO 2 –0.5 Eu 2 O 3 (mol%) glass system were prepared by the melt‐quench technique followed by a two‐stage controlled heat treatment. The unusual oxidation state o…