Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"nanosilver"”.
-
Die-Attachment on Copper by Nanosilver Sintering: Processing, Characterization and Reliability
… performance of the power electronics packages. Nanosilver sintering has becoming an emerging solder-free, environmental friendly die-attach technology. Researchers have demonstrated the feasibility of die-attachment on silver (Ag) or gold (Au) surfaces by pressure-less or low-pressure (< 5 MPa) …
-
Effects of nanosilver and silver nitrate exposure on fathead minnows (Pimephales promelas) and zebrafish (Danio rerio)
Silver nanoparticles (AgNPs) due to their unique antimicrobial properties are among the most widely utilized nanoparticle. Because of the nature of the products that utilize AgNPs, environmental release of AgNPs is inevitable. At greatest risk is the aquatic ecosystem due to known toxicity of the …
-
Processing and Properties of Die-attachment on Copper Surface by Low-temperature Sintering of Nanosilver Paste
… role in the total packaging process. Sintered nanosilver paste may be used as a lead-free alternative to solder for die-attachment at sintering temperature below 300 °C without applying any pressure. Typically, the substrate, such as direct bond copper (DBC) substrates, has surface …
-
A diffusion-viscous analysis and experimental verification of the drying behavior in nanosilver-enabled low-temperature joining technique
… during the pressure-free drying of a die-attach nanosilver paste. Furthermore, the important drying parameters, such as drying pressure, low temperature drying time and temperature ramp rate of nanosilver LTJT process, are experimentally studied and analyzed with the numerical simulation. The …
-
Release of Silver from Nanotechnology Consumer Products and Potential for Human Exposure
Silver nanoparticles (nanosilver) are gaining significant attention from the academic and regulatory communities, not only because of their antimicrobial effects and subsequent product applications, but also because of their potential health and environmental impacts. Although some human health …
-
Effect of silver nanoparticles on planktonic and biofilm cell growth
… that the toxicity of Ag NPs was dependent on nanosilver particle sizes and related to of the concentration of intracellular reactive oxygen species (ROS). However, other metallic/oxide particles such as TiO₂ nanoparticles showed lower toxicity than Ag NPs to the microorganisms with higher ROS …
-
Assessing interactions between nutrients and aquatic toxicity : influences of nitrogen and phosphorus on ionic silver toxicity to the aquatic macrophyte Lemna gibba.
… Such coexposures are important because nanosilver is increasingly released to the environment, and recent studies indicate that the dissolved fraction of nanosilver appears to be more acutely toxic to aquatic life. The primary objective of this study was to understand the effects of …
-
Polysulfone ultrafiltration membranes impregnated with silver nanoparticles show improved biofouling resistance and virus removal
… and enhanced the removal of MS2 bacteriophage. Nanosilver incorporation also increased membrane hydrophilicity, reducing the potential for other types of membrane fouling. Thus, the incorporation of nAg into polysulfone ultrafiltration membranes increases both membrane efficiency and …
-
Bacterial Responses to Silver Nanoparticle Treatment: Community Structure, Resistance, and Function.
… with varying concentrations of both ionic and nanosilver. Cell samples were collected periodically to assess the presence and identity of cultivable silver resistant bacteria and to map the microbial community changes taking place under different treatments using Next Generation Sequencing. …
-
Planar Packaging and Electrical Characterization of High Temperature SiC Power Electronic Devices
… electrical and thermal properties of sintered nanosilver. The packaging using a bump bond as an improved structure was processed and proved to possess desirable forward and reverse I-V behavior. The cross-sections of both planar structures were inspected. High-temperature packaging materials, …
-
Fate of Antibiotic Resistance Genes During Anaerobic Digestion of Wastewater Solids
… of antibiotic sulfamethoxazole and antimicrobial nanosilver did not induce enhanced rates of horizontal gene transfer. Finally, ARG concentrations in biosolids increased during cold temperature storage suggesting that there is a stress induction of horizontal gene transfer of integron-associated …
-
Design Methodology and Materials for Additive Manufacturing of Magnetic Components
… as-prepared magnetic paste and a commercial nanosilver paste was developed and optimized. The properties of as-fabricated magnetic components, including inductance and DC winding resistance, were characterized to prove the feasibility of fabricating magnetic components via 3D-printing. The …
-
Stealth technologies based on thin microwave FSS absorbers
… was obtained by employing a suitable mixture of nanosilver particle ink mixed with an aqueous solution in conjunction with controlling the print dot density. The same manufacturing technique was used for all of the experimental test pieces described in this thesis. A single sheet (140 µm, Rs = 50 …