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Copper nano powder was incorporated into Sn-3.5Ag solder at 3wt%, by mechanically alloyed (MA) by ball milling in a planetary ball mill at room temperature. The rotation speed was kept constant at 150 rpm with different milling time, 26 hours, 78 hours and 120 hours. The milled solder was mixed with flux and reflowed at 240degC for 60 seconds. XRD result confirmed the formation of Cu3Sn after 120...
Microfluidic devices appear to offer important opportunities for modern research, especially for the clinical diagnosis, drug delivery and biomedicine research due to their numerous advantages, such as very low reagent consumption and waste generation, fast reaction time, high reaction efficiency and a large surface to volume ratio. Therefore, microfluidic have been paid much more attention by the...
This paper describes activities aiming to evaluate and compare the resistance to a prolonged corona and ozone exposure for a range of epoxy based compositions filled with micro- and nano-fillers of silica at different proportions. It has been earlier shown for this system that substitution of 5 wt% of micro-filler by nano-filler slightly improved mechanical properties, yielding an increase in Young's...
Epoxy resin systems are used in high voltage transformers, cable terminations, bushings, power apparatus, or insulation for X-ray tubes. They could be used more widely, but low thermal conductivity limits their applications. Polymers used as insulating materials generally lack the ability to dissipate excess heat efficiently. The aim of this study is to investigate the influence of different types...
Nanotechnologies are now inevitable regardless of the scope. In electrical engineering, especially in the context of "major" power systems, insulating materials of tomorrow are in the field of nanotechnologies. These new materials are commonly called "nanodielectrics". Having conducted numerous studies on the intrinsic electrical properties of nanomaterials, we propose in this...
For the application of nanocomposite materials to solid insulator in electric power apparatus, we investigated the influence of the dispersibility of nanoparticles on dielectric property. Experiments were carried out in epoxy/alumina nanocomposites with the particle dispersion techniques using ultrasonic wave and centrifugal force. As the result, we verified the specific characteristics of dielectric...
Nanodielectrics have been extensively researched in recent years with the expectation that they may enhance electrical performance. In this paper we have studied the electrical conduction processes in linear low density polyethylene (LLDPE) filled with nano alumina particles. The electrical conduction was measured at various applied electric fields. It has been found that the conduction current shows...
In order to purify blogical Chinese herbal medicine from wood etractives and hmicellulose at the molecular level, the fresh Chinese-fir cells were extracted in LiOH solution, and were analyzed by ZETA and SIZER to find out the leaching rule of nano particles in Chinese-fir cells. The results are as follows: (1) The extraction mass arrived at the maximum value when LiOH concentration is about 17.5%...
In order to overcome the above-mentioned negative effects, the extractives of the fresh Cunninghamia lanceolata shavings, which were obtained by using both the sorbitic-extracting approaches, were analyzed by ZETA and SIZER to find out the leaching rule of nano particles in Chinese-fir wood. The results are as follows: (1) The extraction mass arrived at the maximum value when NaOH concentration is...
Microsphere particles have been introduced in a wide range of bio-medical applications, such as controlled drug delivery system and tissue repair materials. Microspheres can be produced in many ways including emulsion and stirring. These traditional methods have many restrictions such as large microspheres, production of air bubbles in the microspheres, uneven size and uneven morphology. All these...
In the past decade, rapid development happened in the field of nanotechnology. Recently, nano-material, especially inorganic hybrid molecule, has become an increasingly hot issue in medicine area for safe drug delivery system. In this paper, nano-layered double hydroxides (nano-LDHs) were chosen to be a potential drug carrier. In order to explore the biocompatibility of nano-LDHs with Hela cells,...
CdSe nanoparticles combined with electron accepting materials, specifically methyl viologen (MV2+) and single walled carbon nanotubes (SWCNT), have been investigated. By using transient absorption spectroscopic measurements, ultrafast electron transfer has been shown to occur between the nanoparticles and the accepting materials. These composites were then mixed with poly(3-hexylthopene) to create...
The traditional modular building block for space solar arrays consists of solar cells mounted to an aluminum honeycomb panel with carbon composite facesheets. This design not only provides the structural rigidity for the array, but is critical for heat dissipation during operation in the space. The honeycomb provides consistent thermal conduction and emissive properties throughout the panel, and good...
We present novel metallic/bimetallic (Pt, Au-Pt) nanoparticle-decorated carbon nanotubes and bilirubin oxidase-decorated carbon nanotubes deposited on nano-tube buckypaper as promising supported electro-catalytic systems and as electrode material respectively for mixed-reactant biofuel cell applications at neutral pH. We found that the novel enzyme-decorated carbon nanotubes on nanotube buckypaper...
Highly roughened coral-like porous Au electrode with electroplated Pt nano-particles was newly developed and characterized. The porosity and window-pore size of the fabricated porous Au electrode were approximately 50% and 100-300 nm, respectively. The electroplated Pt nano-particle size was approximately 5-10 nm. For miniaturized electrochemical and biochemical sensor applications, the fabricated...
In this study, nanosized calcium deficient hydroxyapatite (KEHA) was synthesized using microwave irradiation. The synthesized powder was compared with a sample synthesized without using microwave with respect to the observed phases, particle size and powder morphology based on the XRD, particle size analysis and SEM observations. Studies showed that application of microwave has positive effects on...
Wastes from electrical and electronic equipment are the fastest growing waste category. In order to reclaim most of this waste, it is important to consider environmental, safety and health issues of products end-of-life phase as early as in the design phase. Maximum advantage is gained when these issues are already considered while new technology, such as printed electronics, is under development...
The electronic industry drive for miniaturization and increasing functional integration forces the development of feature sizes down to the nanometer range. Moreover, harsh environmental conditions and new porous or nano-particle filled materials introduced on both chip and package level - low-k and ultra low-k ILD materials in back-end of line (BEoL) layers of advanced CMOS technologies, in particular...
Particulate zinc oxide (ZnO) is a known antibacterial agent. Studies have shown that reducing the size of ZnO particles to nanoscale dimensions further enhances their antibacterial properties. ZnO is also piezoelectric. Upon mechanical deformation of ZnO, a transient electrical charge across the material is produced. The purpose of the present in vitro study was to investigate the antibacterial properties...
The lead telluride (PbTe) nanoparticles have been synthesized under ultrasonic/microwave co-irradiation. These PbTe nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and DSC.
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