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Palladium nanoparticles with cubic silsesquioxanes (POSS) (Pd-POSS) were produced from the reaction of palladium (II) acetate andocta(3-aminopropyl)octasilsesquioxane octahydrochloride (POSS-NH3+) in methanol at room temperature. Functionalized multiwalled carbon nanotubes (MWNT-COOH) were prepared by acid treatment of pristine MWNTs. The hybrid nanocomposites with Pd-POSS and MWNT-COOH were synthesized...
Epoxy resin has become an integral part of electronic and electrical devices where the material is exposed to pulse stress. Surface charge accumulation and decay of charged dielectric materials are very important parameters related to the electrical properties of the material. Nano-composite technology makes it possible to improve electrical properties of insulating materials. Therefore, it is important...
Present work addresses the dielectric spectroscopy investigation of epoxy-based composites, filled with magnesium oxide (MgO) nanoparticles with a fillgrade of up to 10 percent by weight. An even distribution of the nanoparticles was realized via ultrasonic vibration and high shear mixing. Dielectric spectroscopy measurement was performed on samples which were cured for 4 hours. Further measurement...
By the use of a coaxial pulsed vacuum arc discharge deposition method (APD), we have developed a catalyst deposition system for support powders or sheet materials under vacuum. In this poster, we introduce Pt catalysis processing for fuel cells and evaluation of the resulting electrical properties.
For high performance dye-sensitized solar cells (DSSCs), Nanostructural TiO2 films with large surface area were prepared by the living radical polymerization and sol-gel process. Titania (TiO2) nanoparticles were surface-modified via atom transfer radical polymerization (ATRP) with hydrophilic poly(metyl methacrylate) (PMMA), which can photodegradable by UV irradiation. Following application of a...
We studied the high-frequency characteristics at 0.5–1.5 GHz of mask-printed silver paste lines with different filler sizes (nanoparticles or micro-sized flakes) and an etched copper foil on glass fiber reinforced epoxy substrate. Although the resistivity of silver-nanoparticle lines was 10 times larger than that of the etched copper foil, its return loss was almost equal to that of the etched copper...
Characterization and measurement science lies at the core of fundamental and applied research, technology development, and commercialization in every scientific discipline. Unfortunately, the importance of the characterization process and its burden on time and money resources is often overlooked and becomes a bottleneck to technology development and commercialization[1]. The ad hoc approach to characterization...
Ultra-thin Silicon-on-Insulator films, in the pseudo-MOSFET configuration, have been used to detect the presence of charged gold nanoparticles on their top free surface. The detection is based on the coupling between the free surface and the channel created at the silicon film - buried oxide interface. The presence of the charged particles on the free surface induces shifts in the electrical characteristics...
A composite structure made of Ag nanoparticles adsorbed on GaN nanowires were used as a Surface-Enhanced Raman Scattering (SERS) substrate. With Rhodamine 6G used as a SERS probe, high enhancement factor of 9*1011 was derived. Detection limit as low as 10−12M was observed. Intensity of the SERS was correlated to the adsorbing pattern of the Ag nanoparticles. Low Ag coverage corresponded to isolated...
Titanium dioxide (TiO2) photoelectrode is one of the most important components in a dye-sentisized solar cell (DSSC). In common, the overall performance of the DSSC depends on the surface area of the TiO2 photoelectrode which is directly correlated to the amount of dye loading. Dye loading increased with the increase in the surface area of TiO2 layer that enhanced short circuit current (Jsc) performance...
Ceramic liposomal nanoparticles, cerasomes, are functionalized with antibodies on their surfaces that act as targeting ligands. This is achieved by using the siloxane network present on the cerasome surface as the foundation for chemical treatment processes previously developed for silicon surfaces. The bio-functionality and physical integrity of the cerasomes are characterized demonstrating successful...
Bionano crystallized poly-Si film for increasing tensile stress in MEMS/NEMS device structures is presented. Ni nanoparticles (NPs) formed in a cage-shaped protein supramolecule, apoferritin, are used as catalyst material for metal-induced lateral crystallization (MILC) of amorphous Si film. Although as-deposited amorphous Si film has compressive stress, with the MILC using the apoferritin containing...
In this paper, a straightforward method based on elastic light scattering is shown to provide a sensitive and reliable tool for the quantitative determination of receptor-ligand interactions that occur at the surface of suitably designed core-shell nanoparticles. The assay makes use of monodisperse nanocolloids that have minimal optical contrast with the aqueous environment. By properly coating the...
Improving the performances of a sensor is a prominent objective in developing innovative for clinical applications. Sensitivity is key features for a biosensor such applications. An improvement in sensitivity is reported when nanoparticles (NPs) are exploited for functionalizing the interacting surface. In this work an original nanostructure was investigated. Gold nanoparticles are immobilized on...
Metal nanoshells, consisting of a dielectric core with a metallic shell of nanometer thickness, are a new, composite nanoparticle whose optical resonance can be designed in a controlled manner. By varying the ratio of the silver ammonia solution to the silicon dioxide solution, we fabricated a strawberry silver/silicon dioxide structure, whose optical resonance is very similar to the nanoshell structure...
Silver nanoparticles embedded in glass are prepared by double ion-exchange process. Silver ions are introduced into glass in silver ion-exchange, and reduced into metallic silver in subsequent potassium ion-exchange. The formed particles are characterized by optical absorption measurement and transmission electron microscopy, and their application in SERS is also demonstrated.
Surface nitrile group functionalized multi-walled carbon nanotubes supported Pt nanocomposites were prepared by the reduction of hexachloroplatinate acid in glycol solution suspended surface functionalized multi-walled carbon nanotubes. Average particle sizes of Pt nanoparticles were estimated by XRD method and TEM micrographs. The data show narrow distribution of the particle size of the Pt nanoparticles...
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