Materials Literature
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Interfacial intermetallic compounds (IMCs) in solder joints are formed during soldering and continue to grow after assembly. Excessive interfacial IMC growth may impact the reliability of solder interconnections due to changes in material behavior. The impact of thermal aging on IMC growth can be determined by subject…
Techenetium-99m is a diagnostic radioactive medical isotope that is currently used 30,000 times a day in the United States. All supplies of techenetium-99m’s parent isotope molybdenum-99 currently originate from nuclear reactor facilities located in foreign countries and use highly enriched uranium (HEU). In accordanc…
This study examined simple approaches for combining the enhanced internal efficiency, photon–solid interaction volume, and extraction efficiency concepts that affect the photoluminescent (PL) brightness of sol-gel-coated film phosphors (FPs). The overall aim was to improve the PL brightness of FPs over commercial and…
This paper describes the formation of fluidic channels by surface adhesion control of the patterned perfluoro polymer layer. We proposed release technology using the poor adhesive region formed by the patterned perfluoro polymer layer. Proposed method releases layered films so as to form a space for a channel. It is p…
Selective Catalytic Reduction (SCR) systems have been shown to be the most promising exhaust aftertreatment system for near term in-use applications to meet the stringent US 2010 oxides of nitrogen (NOx) emissions regulations of 0.2 g/bhp-hr for on-highway heavy duty diesel engines. SCR systems use the ammonia-contain…
In order to control ash deposition on heat exchanger tubes in coal or woody biomass combustion boilers, surface treatment of the tubes, using a thermal spraying technique, was proposed in this study. The ash deposition mechanisms were elucidated, based on physical and chemical aspects, under the condition of long expo…
The nitrogen-doped ZnO particles were prepared by heating a mixture of an ammonium salt and the aqueous sol of zinc peroxide nanoparticles. In the case that the sol of zinc peroxide nanoparticles were mixed with ammonium nitrate in the sol, nitrogen-doped ZnO particles were obtained by heating the mixture at 573 K for…
Recent advance of nanotechnology enables us to develop drug delivery system using nanocarriers. Here I focused on the treatment of inflammatory diseases using nanotechnology, although the most of the pipelines have been developed for cancer treatment so far. First, I described the basic characteristics of nanocarries…
The formation of polydimethylsiloxanes (PDMSs)-based layer-by-layer multilayer ultrathin films on charged surfaces prepared from water and phosphate buffer solutions has been investigated. The multilayer films prepared under these conditions showed different surface roughness. Nanoscale islands and network structures…
The structure of the rust formed on silicon (Si) bearing steel was analyzed by EPMA and FIB-TEM, and the electrochemical behavior of the rust was investigated by the electrochemical impedance spectroscopy (EIS) method after the exposure test. The Si bearing steel showed high corrosion resistance compared to carbon ste…
The phase transition of natural and synthetic ilmenite during oxidation by Cl2 at 390–560°C was characterized. The ilmenite phase was converted to crystallographic shear (CS) phases during the oxidation. One third of the Fe2+ in the ilmenite phase was converted to FeCl3. The remaining Fe2+ was oxidized to Fe3+ in the…
Dependence of bulk modulus on both pressure and temperature, the elastic constants C ij and the pressure and temperature dependence of normalized volume V/V 0 of cubic Ni 2 MnGa alloy are successfully obtained using the first-principles plane-wave pseudopotential (PW-PP) method as well as the quasi-harmonic Debye mode…
Nano-sized polystyrene (PS)-silica nanocomposite particles have been prepared by soap-free emulsion polymerization using a cationic initiator, 2,2'-azobis(isobutyramidine) hydrochloride (AIBA) with a colloidal silica (Ludox SM30, 7 nm diameter). The cationic initiator leads to the formation of the PS-silica nanocompos…
Multilayer ZnO films fabricated by the combination of sol-gel and aqueous solution deposition routes exhibit many flowerlike clusters with the diameter of on their top layer. Each flowerlike cluster is an assembly of nanoparticles in diameter. The investigation of electrochemical properties, phase, and composition of…
Crystallographically oriented yet morphologically squiggly nanoscale ZnO architecture was produced through epitaxial growth by using a simple aqueous solution system. Specific adsorption of pyranine, an organic dye molecule having three sulfonic groups, suppressed regular growth in the c direction, and thus induced la…
Abstract The copolymerization of 2‐aminoethyl methacrylate hydrochloride (AEMA) with styrene (St), butyl acrylate (BuA) or butyl methacrylate (BuMA) in miniemulsion leads to amino‐functionalized nanoparticles. The influences of different pH values and different monomer/water ratios onto the incorporation of AEMA into…
BACKGROUND: Electron cryomicroscopy is a fast developing technique aiming at the determination of the 3-dimensional structures of large protein complexes. Using this technique, protein density maps can be generated with 6 to 10 A resolution. At such resolutions, the secondary structure elements such as helices and bet…
We report an electrothermally-actuated microlens scanner suitable for biomedical imaging applications. Large vertical actuation range of ~0.9 mm with small lateral shift (< 7 mum) and tilting (< 0.38deg) is demonstrated for assembled glass lenses.
With component sizes approaching the mesoscale, conventional size microstructures offer insufficient homogeneity in mechanical properties, forcing microstructures to be reduced to the nanoscale. This work examines the effect of a nanocrystalline surface layer on the dynamic consolidation response of two different morp…
We have developed low temperature and large area nanocrystalline-diamond growth methods using microwave plasma-assisted chemical vapor deposition sustained by surface waves. Highly transparent and smooth nanocrystalline-diamond films were successfully grown on borosilicate glass, aluminum and other substrate materials…