Sintering of nano Ag paste on bare Cu has attracted more interests recently for high-temperature electronics packaging, which offers the advantages high reliability, cost-effective and direct bonding process. However, current methods normally need a protective atmosphere or metallization substrate to avoid oxidation. In this study, self-assembled monolayers (SAMs) were deposited suppress oxidat...

Silver sintering is a promising alternative to high melting point (HMP) solders which contain lead. Indeed, it offers better thermal and electrical properties, and can operate at higher temperature. Currently, several implementations of this technique are available, based on various silver particles sizes and sintering additives. This paper presents a review of the different implementations, an...

OBJECTIVES We sought to establish a novel method to generate nano-sized carbon black particles (nano-CBPs) with an average size smaller than 100 nm for examining the inhalation exposure risks of experimental rats. We also tested the effect of nano-CBPs on the pulmonary and circulatory systems. METHODS We used chemical vapor deposition (CVD) without the addition of any additives to generate na...

Questions about how to regulate nanoenhanced products regularly arise as researchers determine possible nanoparticle transformation(s). Focusing concern on the incorporation and subsequent release of nano-Ag in fabrics often overshadows the fact that many "conventional silver" antimicrobials such as ionic silver, AgCl, metallic Ag, and other forms will also form different species of silver. In ...

Nanoparticles have as characteristics super sliding, extreme pressure, self-healing, etc., which can improve the friction reduction and anti-wear performance of sliding components, when used lubricating oil additives. Nano-copper particles a good synergistic effect with other antifriction agents, antioxidants grease additives because their low shear strength grain boundary slip effect, showing ...

This study investigates the degradation of a commercially available gear lubricant and potential nano-additives to mitigate such degradation. Initially, we performed an experimental on chemical API GL-4 EP90 by mixing different concentrations aqueous hydrochloric acid (aqueous HCl) varying from 0.0005% v/v up 0.0025% v/v, while maintaining overall water content in oil below prescribed limits. T...

OBJECTIVES The present study was conducted to evaluate the effect of nanosized aluminum trioxide (Al2O3) particles when added to the Nano-Bond adhesive system and its effect on the microshear bond strength of nanocomposite resin to dentin. MATERIALS AND METHODS A newly developed adhesive (Nano-Bond) and one type of light-cured resin restorative material (nanocomposite resin) were used in this...

BACKGROUND Oral cavity is a doorway for a variety of products containing titanium dioxide (TiO2 ) nanoparticles (NPs) (nano-TiO2 ) such as food additives, oral healthcare products and dental materials. Their potential to penetrate and affect normal human oral mucosa is not yet determined. OBJECTIVES To evaluate the ability of nano-TiO2 to penetrate the in vitro reconstructed normal human bucc...

The actual task of this work is to obtain homogeneous hard alloys with fine carbide grains, combining high hardness and strength. Studies were carried out establish the most favorable phase compositions rational technical methodology for their production. In research work, a nanostructured WC-TiC-Co powder charge was obtained by mechanochemical synthesis. Nanosized WC nanopowder precipitated Co...