Materials Literature
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The electronic structure of Mn in amorphous Si (a-MnxSi1−x) is studied by x-ray absorption spectroscopy at the Mn L3,2 edges for x=0.005−0.18. Except for the x=0.005 sample, which shows a slight signature of Mn2+ atomic multiplets associated with a local Mn moment, all samples have broad and featureless L3,2 absorptio…
Hexagonal barium ferrite thick films (50–200 µm) have been deposited on Si and Al 2 O 3 /Si substrates using a screen printing technique. X-ray diffractometry, scanning electron microscopy and magnetometry were used to characterize and correlate the ferrite films' microstructure and magnetic properties. The experiment…
The intense bursts of heat released by explosively reacting multilayer foils can be controlled and used as heat sources in joining technologies. We use this method to produce Si/solder/Si joints to characterize the microstructure of the multilayer foil in the reacted state as well as the foil/solder interface. The res…
Antimony sulfide thin films (thickness, 500 nm) were deposited on chemically deposited CdS thin films (100 nm) obtained on 3 mm glass substrates coated with a transparent conductive coating of SnO 2 :F (TEC-15 with 15 Ω sheet resistance). Two different chemical formulations were used for depositing antimony sulfide fi…
In this study, the authors have investigated the optical properties of hydrothermally grown ZnO nanorods subjected to the combination of thermal annealing and nitrogen plasma treatments. In particular, ultraviolet-visible micro-Raman scattering has been used to study the influence of nitrogen incorporation in ZnO nano…
The aging effect of a 0.2mol% Fe-doped 0.62Pb(Mg1∕3Nb2∕3)O3–0.38PbTiO3 single crystal was investigated. The authors found that aging induced a double ferroelectric hysteresis loop and a giant recoverable electrostrain of 0.8% at an electric field of 1.2kV∕mm in the ⟨001⟩-oriented tetragonal crystal. This result is muc…
ABSTRACT Whey protein, a by‐product of cheese manufacture, can be used to make edible films and coatings that are oxygen, aroma, oil and/or moisture barriers. Dried peanut kernels were packed into whey protein concentrate (WPC)–olive oil composite films and stored at 25C for 4 weeks. Peroxide value (PV), moisture upta…
We have measured steady state photoinduced absorption (PIA) of PbS quantum dot (QD) film in an energy range of interband electronic transitions at low temperature. PIA spectra show both positive and negative PIAs corresponding to five consecutive interband transitions. The close resemblance between PIA spectrum and th…
We have found that an addition of SnO in a bismuth-borate glass, CaO–B2O3–Bi2O3–Al2O3–TiO2, decreases the optical absorption coefficient in the visible region, in which selective crystallization of TiO2 was observed after heat treatment. Since selective crystallization of TiO2 was also attained in the SnO-containing g…
Ferroelectric SrBi 2 Ta 2 O 9 (SBT) thin films have been deposited by the radio-frequency magnetron sputtering technique on bare p-Si as well as on HfO 2 insulating buffer p-Si. XRD patterns revealed the formation of a well-crystallized SBT perovskite thin film on the HfO 2 buffer layer. The electrical properties of t…
Cobalt-doped (1−x)BiScO3-xPbTiO3 piezoelectric ceramics were fabricated by conventional solid state synthesis, in which a morphotropic phase boundary (MPB) region was observed in the compositional range of 0.48⩽x⩽0.53 from the phase structure measurement. Co doping in the 0.50BiScO3–0.50PbTiO3 ceramics resulted in a r…
We report on the direct observation of tetragonal nanodomains within an average monoclinic MC phase of Pb(Mg1∕3Nb2∕3)O3-0.35PbTiO3 single crystals by high-resolution transmission electron microscopy. These nanodomains are geometrically arranged in alternating layers of twins. The findings are consistent with the funda…
Air-stable n-type field effect transistors were fabricated with an axially oxygen substituted metal phthalocyanine, tin (IV) phthalocyanine oxide (SnOPc), as active layers. The SnOPc thin films showed highly crystallinity on modified dielectric layer, and the electron field-effect mobility reached 0.44cm2V−1s−1. After…
The improvement in the phase change characteristics of Ge2Sb2Te5 (GST) films for phase change random access memory applications was investigated by doping the GST films with SiO2 using cosputtering at room temperature. As the sputtering power of SiO2 increased from 0to150W, the activation energy for crystallization in…
Abstract Silica‐, nanoclay‐, and carbon black (CB)‐filled ethylene–propylene–diene terpolymer (EPDM) mixtures were prepared and subsequently vulcanized. Rheological properties and cure characteristics of the mixtures and mechanical properties of vulcanizates were measured. Rheological property measurements indicated t…
The unique geometry of multilayer thin films, with layer thicknesses on the nanoscale, gives rise to a wide range of novel properties and behavior that are not observed in the bulk. The novel behavior is critically dependent on the microstructure of the films. This paper reviews the use of a range of transmission elec…
Epitaxial ZnO thin films were grown on c-plane sapphire substrates by rf magnetron sputtering at room temperature followed by a rapid thermal annealing process. We found that crystallinity of the films was strongly affected by the partial oxygen pressure during deposition. Both x-ray diffraction and transmission elect…
Abstract The thermal oxidative degradation kinetics of poly(ethylene terephthalate) (PET) copolymers modified with poly(lactic acid) (PLA) were investigated with thermogravimetric analyzer (TGA). The thermal properties of the modified products were also determined by differential scanning calorimeter (DSC) technique.…
Abstract Poly(phenylene sulfide) (PPS)/multiwalled carbon nanotubes (MWNTs) conductive composites were prepared through the simple mixing of PPS granules with MWNT powder and subsequent compression. The electrical properties as a function of MWNT loading clearly showed a low percolation threshold of about 0.22 vol % a…
We analyze cloaking of transverse electric (TE) fields through homogenization of radially symmetric metallic structures. The two-dimensional circular cloak consists of concentric layers cut into a large number of small infinitely conducting sectors which is equivalent to a highly anisotropic permittivity. We find that…