Materials Literature
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Treating ZnO and NiO oxides with glow discharge oxygen plasma and high-frequency argon plasma is found to affect the catalytic activity of these oxides in the dehydrogenation reaction of isopropanol, leading to an increase in the conversion of alcohol and the yield of acetone. The increased activity of ZnO is due to t…
We report on a memory effect observed in an inverted bulk heterojunction organic photovoltaic device, where the electron-collecting electrode is ZnO nanowires grown on an indium tin oxide (ITO) substrate. The device presented a unique response to light by switching from a rectifying behavior in the dark to a resistive…
Metamaterials possess intricate, sub-wavelength microstructures, making scalability a salient concern in regard to their practicality. Fiber-drawing offers a route to producing large quantities of material at relatively low cost, though to our knowledge, a fiber-based design capable of negative refractive index behavi…
The present article is focused on the studies regarding the effects of ultraviolet (UV) light on poly(ethylene terephthalate) (PET) films surfaces using scanning electron microscopy (SEM), Fourier transform infrared, X-ray photoelectron spectrometry (XPS), and atomic force microscopy (AFM) measurements, subsequent to…
It is shown that a droplet will levitate over the liquid surface for 50–700 ms when released from a critical height 1.5–4 times the droplet diameter. While releasing a droplet out of this range will lead to direct submersion. Additionally, it is shown that by applying a temperature difference between the liquid pool a…
Large-scale evaporative cooling is one of the leading sources of fresh water consumption. Dry cooling based on existing heat exchangers, however, has found limited usage due to the high cost and large foot prints/weights. Development of alternative low-cost light-weight heat exchangers for dry cooling is therefore urg…
Prussian Blue analogue (PBA) nanoparticles can be self-assembled at air/liquid interfaces to build novel materials with interesting magnetic features. Herein, we study the influence of the size of PBA Cs0.4 Ni[Cr(CN)6 ]0.9 and K0.25 Ni[Fe(CN)6 ]0.75 nanoparticles on the self-assembly behavior by synchrotron X-ray refl…
Abstract Manganese oxyhydroxide (MnOOH) nanoparticles were synthesized by the reaction of [Mn(Hsal)2] complex and NaOH in the presence of ultrasound irradiation. In this study, the effect of different reaction parameters such as type of solvent, sonication time and type of surfactant on the morphology and the particle…
Thinner printed wiring assemblies (PWA) and smaller clearances are driven by the continuing increase of functionality and miniaturization in portable electronic devices. The probability of secondary impact during accidental drop and impact between a circuit card and adjacent components increases with the decrease in t…
Nanostructures with various configurations have been extensively used to engineer the emission properties of embedded fluorophores, but lack the flexibility to dynamically control fluorescence. Here we report a thin-film cavity system, comprising a quarter wavelength thick dye-doped dielectric coating on a reflecting…
The drive for ever more safety and fuel efficiency in the automotive industry led the industry to search for steels with enhanced strength and ductility. Promising candidates to satisfy these demands are steels with a microstructure consisting of martensite and significant fractions of retained austenite. One class of…
Phosphonoacetate (PAA), diethyl phosphonoacetate (DPA), and sulfoacetate (SAA) anions have been intercalated into the galleries of the layered double hydroxide (LDH) [LiAl 2 (OH) 6 ·X]· y H 2 O (LiAl-X; X = Cl, NO 3 ). X-ray diffraction (XRD), Fourier transform infrared spectroscopy, and elemental microanalysis confir…
Solder micro-bumps, which serve as interconnects between stacked dies in 3D electronic packages, are typically very thin (25μm or less) and contain a high proportion of intermetallic compounds (IMCs). This makes micro-bumps brittle, and prone to fracture, particularly under drop conditions. In this paper, the fracture…
Highly filled thermally conductive silicone gels are routinely used as first level thermal interface materials (TIMs) between the die and lid, in flip-chip organic packages. The main challenge for these TIMs is overcoming the Coefficient of Thermal Expansion (CTE) mismatch between the die and lid materials. The TIMs m…
Conformational parameters of some aromatic polyimides–containing naphthalene units have been calculated by Monte Carlo method taking into consideration the hindered rotation produced by voluminous naphthalene units. Several physical properties such as solubility, glass transition temperature ( T g ), and initial decom…
InAs/GaAs1−xSbx Quantum Dot (QD) infrared photodetectors are analyzed by photocurrent spectroscopy. We observe that the integrated responsivity of the devices is improved with the increasing Sb mole fraction in the capping layer, up to 4.2 times for x = 17%. Since the QD layers are not vertically aligned, the vertical…
The morphology of polyethylene synthesized over rac‐Et(indenyl)2ZrCl2/MAO catalyst supported on silica nanotubes of anodized aluminum oxide (AAO) template and on liberated silica nanotubes have been studied. A silica nanotube is quickly filled up with polymer, which extrudes out to the bulk liquid phase as nanofibrils…
The chemical polymerization method was used to prepare a poly (o-toluidine) which was characterized by different techniques including (FTIR, XRD, SEM) while, blend polymer of poly (o-toluidine)/polyvinyl alcohol (PVA) was made by mixing different volume ratios of PVA and POT (1:1, 1:2, 2:1)respectively. Thin films of…
The solubility, phase equilibria, and critical phenomena in the cesium nitrate-water-butyric acid ternary system, in which the boundary binary liquid system is not separated over the whole temperature range of its liquid state, were studied by the visual-polythermal method at 5–100°C. The temperature of formation of t…
Molybdic acid–modified phenolic resin (Mo-PF) had been synthesized and was used to prepare fabric composites. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) indicated that the thermal properties were improved when the phenolic resin was modified by molybdic acid. The tribological properti…