Materials Literature
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The aimed of this research are to compare physical dan mechanical properties between raw materials and Shielded Metal Arc Steel Weld Metals and to find optimum temperature of annealing. A series of Shielded Metal Arc Steel Weld Metals were made on 3 mm of Thick A 287 carbon steels. The electrode used was E 6013, Ø…
In this paper, a new optical pick-up actuator is proposed using PMN-PT (lead magnesium niobate–lead titanate) bimorphs for slim and small form factor optical disk drives. We suggest a novel structure enabling both tracking and focusing motions by changing the moving directions of the two parallel bimorphs. A cymbal-ty…
The authors fabricated random-network single-walled carbon nanotube field-effect transistors (FETs) with high-κ gate insulators. The gate insulator in the FETs was changed from SiO2 to Ba0.4Sr0.6Ti0.96O3 (BST, εs=100), which was fabricated by a sol-gel method. The gate-switching voltage of a FET with a BST insulator i…
Si 3 N 4 and Ge 3 N 4 are important structural ceramics with many applications because of their outstanding high-temperature and oxidation-resistant properties. Two stable phases of them, α and β, have thus far been synthesized. The high-pressure and high-temperature spinel phases of these two materials were noticed t…
Polyacrylic acid- co -poly(vinyl sulfonic acid)/polyaniline interpenetrating polymer network (IPN) hydrogels were prepared, and an electrical stimulus was applied to the IPN hydrogels in an electrolyte solution, where the IPN hydrogels underwent a change in volume. The IPN hydrogels showed a reversible change in volum…
Abstract Polyaniline (PANI) was synthesized by chemical oxidative polymerization of aniline (ANI) in the presence of sulfonated crosslinked polystyrene (SCPS) particles in neutral water. The polymerization of ANI occurred preferentially on the surfaces of the SCPS particles, resulting in core/shell structured SCPS/PAN…
Abstract The crystal structure of the adamantane compound CuFeInSe 3 , belonging to the system (CuInSe 2 ) 1– x (FeSe) x with x = 0.5, was analyzed using X‐ray powder diffraction data. Several model structures were derived from the structure of the selenium rich phase CuInSe 2.3 by permuting the cations in the availab…
The present computational study investigates the adsorption of N(2) by Cu-ZSM-5, with particular regard to the interaction with pairs of Cu(+) ions, employing simple cluster models in the calculations. It shows that several interaction patterns between N(2) and couples of Cu(+) sites are possible within the Cu-ZSM-5 s…
Abstract The polymorphism of poly(vinylidene fluoride) (PVDF) and its nanocomposites was studied by means of solid state nuclear magnetic resonance spectroscopy. 13 C cross polarization magic angle spinning ( 13 C CP MAS) NMR spectra were recorded using simultaneous high‐power decoupling on both the proton and fluorin…
As the phase transformation temperatures influence the phase transformation behaviors of shape memory alloys, a constitutive model which can predict their phase transformation behaviors is necessary. In this study, a series of DSC tests is conducted to determine the phase transformation temperatures of shape memory al…
The drive towards ubiquitous electronics requires fundamental shifts in our approach to microelectronic fabrication as well as advances in materials and processing technologies. For large area electronics, low cost manufacturing, including roll-to-roll and printing technologies, will be required. These techniques pres…
Nonquasistatic effects in ac characteristics of carbon nanotube field-effect transistors are examined by solving a full time-dependent, open-boundary Schrödinger equation. The nonquasistatic characteristics, such as the finite channel charging time, and the dependence of small signal transconductance and gate capacita…
Attractive van der Waals--London dispersion interactions between two half crystals arise from local physical property gradients within the interface layer separating the crystals. Hamaker coefficients and London dispersion energies were quantitatively determined for $\ensuremath{\Sigma}5$ and near-$\ensuremath{\sum}13…
The authors report low-temperature preparation of Pb(Zr0.6,Ti0.4)O3 (PZT) thin films below 300°C using SrTiO3 seed layers on (111)Pt∕IrO2∕SiO2∕(001)Si substrates by metal-organic chemical vapor deposition. The critical parameters contributing low-temperature preparation for PZT were crystallinity and orientation of Sr…
The real part of the complex electric permittivity at low frequencies and at several biasing fields (between 0 and $5\ifmmode\times\else\texttimes\fi{}{10}^{5}\phantom{\rule{0.3em}{0ex}}\mathrm{V}∕\mathrm{m}$) has been measured in ferroelectric crystals ${[\mathrm{C}{\mathrm{H}}_{3}\mathrm{N}{\mathrm{H}}_{3}]}_{5}{\ma…
Oxidation of Cu3Au(100) using a hyperthermal O2 molecular beam (HOMB) was investigated by x-ray photoemission spectroscopy in conjunction with a synchrotron light source. From the incident energy dependence of the O-uptake curve, it was determined that the dissociative adsorption of O2 implies a higher activation barr…
Abstract Mono‐polyhedral oligomeric sillsesquioxane‐end capped poly(ε‐caprolactone) (mPPCL) can form inclusion complexes (ICs) with α‐ and γ‐cyclodextrins (CDs) but not with β‐CD. These CD ICs have been characterized with X‐ray diffraction, solid‐state 13 C cross‐polarization/magic‐angle‐spinning NMR spectroscopy, 1 H…
The authors report the fabrication of the nanopillars with single InGaAs∕GaAs quantum well by selective-area metal organic vapor phase epitaxy. The standard diameter deviation of the nanopillars is about 8% and the standard deviation in their height about 5%. Their photoluminescence peak positions shift to the longer…
The authors report depth-resolved optical properties of excitonic and phonon-assisted transitions in ZnO epilayers by photoluminescence (PL) and cathodoluminescence. A weaker free exciton (FX) emission than its first longitudinal optical phonon replica (FX-1LO) is observed at elevated temperatures (T>150K) for…
Room temperature Co K-edge extended x-ray absorption fine structure (EXAFS), x-ray absorption near edge structure (XANES) including pre-edge and x-ray diffraction (XRD) studies are carried out on LaCoO3 and PrCoO3. The Co-O, Co-La/Pr and Co-Co bond lengths are obtained from EXAFS analysis and compared with those obtai…