Materials Literature
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Ultra-broadband infrared luminescence has been observed in bismuth (Bi)-doped germanate thin-films prepared by pulsed laser deposition. The films are compatible with various types of substrates, including conventional dielectrics (LaAlO(3), silica) and semiconductors (Si, GaAs). The emission peak position of the films…
The phosphotransferase system (PTS) is involved in the use of carbon sources in bacteria. Bacillus sphaericus, a bacterium with the ability to produce insecticidal proteins, is unable to use hexoses and pentoses as the sole carbon source, but it has ptsHI genes encoding the two general proteins of the PTS: enzyme I (E…
Epitaxial CoFe2O4 (CFO) films of varying thickness were grown on piezoelectric Pb(Mg1∕3Nb2∕3)0.72Ti0.28O3 substrates. The magnetic anisotropy of the CFO films is controlled by the piezoelectric in-plane strain imposed by the substrate constraint during application of an electric field. We find that the strain-induced…
To investigate heterostructures of interest for catalytic applications, we integrated rutile TiO2 epitaxial thin films with Al2O3(0001), Al2O3(101¯0), and Al2O3(011¯2) substrates and studied structure and properties of the epilayers as a function of the crystallographic characteristics of the substrate. The epitaxial…
High throughput transmission electron microscopy (TEM) is limited by the time that it takes to prepare each specimen and insert it on the microscope. It is further impeded by the deteriorating vacuum of the microscope upon frequent specimen cycling. Nevertheless, in most cases only a small fraction of the specimen is…
Universal exhaust gas oxygen sensors (UEGOs) are in widespread use in internal combustion engines where they are used to measure lambda (the non-dimensional air–fuel ratio) and oxygen concentration (). The sensors are used on production engines and for research and development. In a previous paper, a model of the UEGO…
This paper is concerned with the estimate of second Hankel determinant for the classes of analytic- univalent functions with respect to conjugate points and with respect to symmetric conjugate points in the unit disc E={z:|z|<1}
Nitrogen adsorption isotherms (NAI) and Nitrogen desorption isotherms (NDI) are commonly used to evaluate specific surface area (SSA) of soils and other materials. Scaling analysis of N 2 isotherms yield complementary information about the complexity of the soil surface. We evaluated the specific surface area (SSA) an…
A review of studies on the computer simulation of the phase behavior of various stiff-chain polymer systems is presented. Methods for calculating phase diagrams of a polymer solution in a computer experiment are discussed, including the methods of extended ensembles, entropic simulation, and the Wang-Landau algorithm…
Graphene represents a two-dimensional material having extraordinary physical properties, which make it a prospective material for many applications. In particular, graphene oxide (GO), with abundant chemical functional groups, further extends the new functions of graphene-based materials. However, the preparation of G…
A coupled transmission line model whose parameters are analytically given is provided for fast and accurate analysis of miscellaneous plasmonic structures with metal-dielectric-metal (MDM) arrangement. The coupling of surface plasmons supported by the planar metal-dielectric interfaces is included in the proposed mode…
Contrary to previous studies that identified the ground state crystal structure of the entire ${R}_{3}$Co series ($R$ is a rare earth) as orthorhombic $Pnma$, we show that Y${}_{3}$Co undergoes a structural phase transition at ${T}_{t}\ensuremath{\simeq}160$ K. Single crystal neutron diffraction data reveal that at ${…
ABSTRACT In this work, a reduced size planarized antenna based on metamaterial split‐ring resonators (SRRs), for personal communications, is presented. The antenna is based on different size concentric SRRs that operates in the R band, centered at 2.3 GHz. The antenna area is about 15 × 25 mm2, approximately. The meas…
The methanol-oxidizing system (mox) is essential for methylotrophic bacteria to extract energy during the oxidoreduction reaction and consists of a series of electron-transfer proteins encoded by the mox operon. One of the key enzymes is the α₂β₂ methanol dehydrogenase complex (type I MDH), which converts methanol to…
Sensitized aluminum 5456-H116 is characterized by a continuous network of β phase. The use of ultrasonic impact treatment refines the near surface microstructure to produce nanograins that vary in size from 2 to 200 nm in diameter. The deformation layer does not exhibit the presence of a continuous β phase indicating…
The photosynthetic photosystem I reaction center complex (PSI-RC), which has a molecular diameter of 21 nm with 100 pigments, was incorporated into silica nanopores with a 100-nm diameter that penetrates an alumina plate of 60-μm thickness to make up an inorganic-biological hybrid photocell. PSI-RCs, purified from a t…
Silicon metal-assisted chemical etching (MACE) is a nanostructuring technique exploiting the enhancement of the silicon etch rate at some metal-silicon interfaces. Compared to more traditional approaches, MACE is a high-throughput technique, and it is one of the few that enables the growth of vertical 1D structures of…
A systematic investigation of the non-linear interplay between the uniaxial magnetic anisotropy induced by oblique deposition and the unidirectional magnetic anisotropy induced by exchange bias coupling in NiFe/MnIr bilayers was performed. It was found that depending on the oblique angle, the uniaxial anisotropy induc…
Hysteresis hinders the precision of smart materials in sensors and actuators and impedes the development of smart material actuators. This paper addresses a novel piecewise identification approach of hysteresis in smarts materials, where hysteresis is modeled by discrete Preisach operator. The hysteresis curve is divi…
A photoluminescence method is proposed for quantification of N in Czochralski-grown Si. We transformed N impurities on the order of 1013–1015 cm-3 into radiative centers responsible for the A-line at 1.1223 eV by forming an isoelectronic Al–N pair using Al ion implantation. The relative intensity of the A-line to the…