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To meet the requirements for future fine pitch and high-performance interconnects in advanced packaging, ICAs with nano-materials are attracting more and more interest due to their specific electrical, mechanical and optical properties. There has been extensive research on nano-conductive adhesives containing nanofillers such as nanoparticles, nanowires or carbon nanotubes. In this paper, copper nanoparticles...
In order to improve delivery of therapeutic agents, better delivery systems are required. However, many drug delivery platforms have been developed based on a trial and error approach. Systematic study of factors affecting nanomaterial internalization within cells is lacking. Several drug carriers including liposomes and polymeric microspheres have been proposed in the past. Furthermore, unmet needs...
Graphene found to be one of the best alternative to carbon nanotubes due to its superior properties and distinctive nanostructure. Graphene supported palladium electrocatalysts (Pd/G) is prepared using a facile microwave reduction method; which assists reduction of graphene oxide and further leads to formation of palladium nanoparticles. The structural characteristics of the prepared materials are...
A facile method for in-situ dressing of multi-walled carbon nanotubes (MWNTs) with TiO2 nanoparticles was achieved using modified microwave technique. TiO2/MWCNT nanocatalyst was formed using titanium (IV) isopropoxide as the precursor in the presence of MWCNTs and constantly irradiated for 5 min. FE-SEM micrographs suggested that TiO2 nanoparticles were well attached on the outer sidewall of MWCNTs...
Pulsed laser ablation in liquids is a simple synthesis process of nano-particles for the production of high purity material with no need for any expensive instrumentation except laser. The 532 nm wavelength laser beam with 5 ns pulse width and 10 Hz repetition rate was an ablating laser source. In order to control the size and stoichiometry of the nano particles, the laser ablation was done in the...
Nanocomposite materials are nowadays widely studied. It is often desired, by the addition of nanoparticles in an insulating matrix, to improve electrical and thermal properties. However, few types of nanoparticles enable improvement of combined electrical and thermal properties. Here the influence of the presence of graphene nanoparticles in an epoxy matrix on space charge accumulation is studied...
CNTs@SiO2 core-shell nanoparticles were synthesized via tetraethyl orthosilicate (TEOS) hydrolyzing and condensing on the CNTs' surface. The effect of reaction parameters, including temperature, time, ratio of the cationic surfactant cetyltrimethyl ammonium bromide (CTAB)/ CNTs, and TEOS/CNTs on the structure of nanoparticles was investigated. Results showed that the optimized temperature, time, ratio...
This study reports a simple but effective glycothermal method for synthesis of urchin-like vanadium pentoxide (V2O5) nanostructures for gas sensing. By this method, the V2O5 nanostructure was prepared by two steps, involving preparation of precursor, followed by calcinations. The as-prepared precursor particles were rods (200 nm×1 µm) and could assemble into microspheres or urchin-like structures...
In order to improve the electrocatalysis of oxygen reduction and reduce the captive cost of microbial fuel cell (MFC), graphene-supported catalyst of silver nanoparticles (Ag/RG) was prepared and its activity toward oxygen reduction reaction (ORR) in pH-neutral condition was examined. The Ag/RG catalyst was prepared by chemical reduction of aqueous silver ions to silver nanoparticles on the surface...
AgI nanoparticle has been reported to exhibit size-dependent properties. In the paper, we reported the use of combinations of surfactants, such as AOT, SDS, PVP and TWEEN20, to control the AgI synthesis. AgI nanoparticles can be obtained with different sizes. Measured and confirmed by DLS and TEM, the nanoparticles can be massively and evenly prepared with the sizes less than 20nm. The post-processing...
Adjustable carrier concentration is an attractive feature of semiconductor nanoparticle that allows its surface plasmon resonance to be tuned. While quasi-static treatment of the electromagnetic interactions with the charge species can account for the polarization process in a conductive nanoparticle, a full-wave solution of the Maxwell's equations is needed to give a realistic portrait of the current...
Dispersion effects and power dissipation by a conductive nanoparticle are revealed by its frequency dependent polarizability, which collectively represents the response of the charge species within the particle to an applied field when the particle diameter is small compared to the wavelength in the embedding medium. Plasmonic interactions in nanopaticles are impetus to a variety of novel device and...
Hybrid clusters comprising TiO2 nanoparticles (NPs) supported by discrete clusters of Au NP were fabricated through a template guided self-assembly strategy, and the electromagnetic interactions between the building blocks were investigated using experimental and theoretical tools. The performed studies reveal that electromagnetic interactions between the building blocks result in an enhancement of...
In this paper we present two examples of combining fluorescent nanoparticles with photonic materials. First, we present the results on new compound: nanodiamonds and silk. Second, we report on ZnO fluorescence, with ZnO nanoparticles obtained by Zn-ion implantation in silica.
A plasmon resonant mode is the collective oscillation of free electrons in a structure stimulated by incident light. Reducing the gap between two metal nanoparticles down to atomic dimensions uncovers novel plasmon resonant modes. Of particular interest is a mode known as the charge transfer plasmon (CTP). This mode has been experimentally observed in touching nanoparticles, where charges can shuttle...
Titanium dioxide (TiO2) has high optical refractive index and is transparent to visible light. No strong reflection is expected from a single layer of continuous TiO2 film. In this work, we report the unusually high reflection from a thick layer of TiO2 nanoparticles. TiO2 nanoparticles of different sizes (~ 21 nm and ~ 400 nm) were deposited on indium tin oxide (ITO) coated glass substrate by electrophoretic...
This study captures the time-dependent dielectric breakdown kinetics in nanoscale Cu/low-k interconnect structures, applying in-situ transmission electron microscopy (TEM) imaging and post-mortem electron spectroscopic imaging (ESI). A “tip-to-tip” test structure and an experimental methodology were established to observe the localized damage mechanisms under a constant voltage stress as a function...
We had suggested a novel method for the synthesis of silver nanoparticles by suitable choice of materials and solvents. It was a green, straight forward method in an aqueous medium. Additionally, nontoxic reagents were used in the experiment and the process was environmentally friendly. This green approach needs three reagents (dextran, tollens' reagent, glucose) which come from renewable resources...
This work highlights the interest of silver oxalates precipitated in hydro-alcoholic media as new soldering material. The silver-oxalate-based solder can be decomposed starting from temperatures as low as 90°C and leads to the formation of temporary nanometric grains of metallic silver having a high propensity for sintering. The final material is a porous silver network that can be used as high thermal...
Plasmonic core-shell nanoparticles (PCSNPs) can function as nanoantennas and improve the efficiency of dye-sensitized solar cells (DSSCs). To achieve maximum enhancement, the morphology of PCSNPs needs to be optimized. Here we precisely control the morphology of Au@TiO2 PCSNPs and systematically study its influence on the plasmonic enhancement effect. Enhancement mechanism was found to vary with the...
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