Materials Literature
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The integration of vertical natural capacitors (VNCap) into existing backend-of-line (BEOL) stacks is an important aspect to enable radio-frequency and mixed signal features without extra mask costs. From manufacturing and reliability point of view these devices can be rather challenging since they may contain million…
A carbon-nanotube-atom fixed and activated scheme of non-equilibrium molecular dynamics simulations is put forward to extract the thermal conductivity of carbon nanotubes (CNTs) embedded in solid argon. Though a 6.5% volume fraction of CNTs increases the composite thermal conductivity to about twice as much as that of…
Cupromakovickyite, ideally Cu 8 Pb 4 Ag 2 Bi 18 S 36 , is a new mineral species that occurs at the skarn deposit of Baiţa Bihor, Romania, and at the scheelite deposit Felbertal, Salzburg Province, Austria. The associated minerals are makovickyite, bismuthinite derivatives (aikinite–friedrichite range), hodrusite, kupc…
Polycyanurate‐modified montmorrilonite (PCN‐MMT) nanocomposites were synthesized by polymerization of dicyanate ester of bisphenol A in the presence of MMT dispersed by ultrasound. Techniques of IR spectroscopy, WAXD, and TEM were applied to study polymerization kinetics and structure of the nanocomposites prepared, w…
Symmetrical bi‐1,3,4‐oxadiazole derivatives, namely 5,5′‐bis(phenyl 4‐alkoxybenzoate)‐2,2′‐bi‐1,3,4‐oxadiazole (BBOXD‐n, n = 6, 10, 14, 16), were synthesised. All BBOXD‐n exhibited remarkably stable SmC phases by virtue of the high transition enthalpies of SmC–I. In addition, BBOXD‐6 and BBOXD‐10 showed an enantiotrop…
This work is a study of the thermal stability of (001)-cut Pb(Mg1/3Nb2/3)1−xTixO3 (x=0.30) single crystals before and after an electric (E)-field poling by means of dielectric permittivity, hysteresis loop, domain structure, polarization current, and x-ray diffraction. An R(RNT)-R(RNT)/T(TNT)-T(TNT)-C transition seque…
The electrochemical behaviour of two Cu-Ag alloys, namely (20wt%Cu + 80wt%Ag) and (80wt%Cu + 20wt%Ag) alloys, was studied in 0.15 M borax and 0.15 M boric acid buffer solution, pH =8.45, by means of cyclic voltammetry, potentiodynamic anodic polarization and current/ time transients techniques. SEM and XRD microanalys…
We have conducted electromigration studies of Cu interconnects with wide-to-narrow transitions and observed bimodal failure distributions. The early failure mode corresponds to a fatal void at the width transition site while the late failure mode corresponds to a fatal void at the cathode. Also, we observed that as th…
Static-spray deposition of a polyol-based sol, containing nanoparticles of NiZn ferrite, on a moderately heated glass support, has been used to generate crystalline thin films. The films exhibit superparamagnetic behavior with a blocking temperature, which decreases as the zinc content increases, due to their nanocrys…
Phase formation in the B-C-N system has been studied at pressures from 6 to 15 GPa and temperatures from 1000 to 1600°C using mixtures of carbon nitride (C 3 N 4 ) nanospheres and boron. A new ternary phase with the structure of cubic boron nitride in which some of the nitrogen and boron atoms are replaced by carbon h…
High-temperature mass-spectrometric analysis is used to study the sublimation of SrMoO4(s) at 1570–1800 K. SrMoO4(g) molecules are found to be present in the vapor. The vapor pressure of the SrMoO4(g) molecule is determined to be log p = −19980/T + 7.99. The heat of sublimation ΔH s, 0 o (SrMoO4(s)) = 480 ± 40 kJ/mol…
A blend/clay nanocomposites of 50/50 (wt%) NR/SBR was prepared via mixing the latex of a 50/50 NR/SBR blend with an aqueous clay dispersion and co‐coagulating the mixture. The structure of the nanocomposite was characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Nanocomposites containi…
The paper describes our research of microwave usage in drying the size pick-up. An analysis of three different drying processes in relation to physical-mechanical properties of sized yarn has been carried out. Under the same sizing conditions, but different drying methods, the following parameters were determined: bre…
Site-specific single polyaniline nanowires were fabricated through electrophoresis growth with acetone wetting. After growing the nanowires, the post-process of acetone wetting of the nanowires improved morphology, topology, and electrical conductivity with coagulation and substitution in polyaniline. They showed resi…
We propose and demonstrate the "defect-induced plasma process" for the fabrication of the room-temperature-operated carbon nanotube single-electron transistors (CNT-SETs) with the SiO 2 protection films on the CNT channels. After introducing of defects in the CNT channels by O 2 plasma irradiation through the SiO 2 pr…
The problem of a single acoustically driven bubble translating unsteadily in a fluid is considered. The investigation of the translation equation identifies the inverse Reynolds number as a small perturbation parameter. The objective is to obtain a closed-form, leading order solution for the translation of the bubble,…
Size-dependence of optical properties and energy relaxation in CdSe/ZnS quantum dots (QDs) were investigated by two-colour femtosecond (fs) pump-probe (400/800 nm) and picosecond time-resolved photoluminescence (ps TRPL) experiments. Pump-probe measurement results show that there are two components for the excited car…
A acidez do solo e variáveis associadas são muito importantes nos manejos dos solos, especialmente nas regiões tropicais e subtropicais. Com o objetivo de estudar algumas variáveis da acidez do solo e verificar a influência da mineralogia da fração argila sobre a relação entre pH em CaCl2 e grau de saturação por bases…
Anchoring transitions were observed of nematic liquid crystal (LC) mixtures on obliquely evaporated SiO x by varying the relative abundance of two components in the mixture. Of these two components, one has a longitudinal cyano group and another has lateral cyano groups. It was also found that both temperature and SiO…
The crystal Structure of cupromakovickyite, ideally Cu8Pb4Ag2Bi18S36, from the skarn deposit at Baita Bihor, in Romania, has been solved by direct methods and refined to an RI index of 5.36% for 2680 unique reflections measured with MOKU radiation oil it four-circle diffractometer equipped with a CCD detector. Cuproma…