The interfacial bonding utilizing Ag2O-derived silver nanoparticles was evaluated using TEM observation and molecular dynamics simulation. The TEM observation reveals that the crystal orientation of the sintered silver corresponded to that of the gold substrate. This is considered that the epitaxial layer of silver was formed through in-situ formation of silver nanoparticles from Ag2O paste, an...

Acoustic vibrations of single gold nanorods coated with silver were investigated. We used single-particle pump-probe spectroscopy to monitor the silver deposition through the particle vibrations. Two vibration modes, the breathing mode and extensional mode, are observed, and the vibrational frequencies are measured as functions of the amount of silver deposited on single gold nanorods. The brea...

In this present study, we reported broccoli (Brassica oleracea L.) as a potential candidate for the synthesis of gold and silver nanoparticles (NPs) in green chemistry method. The synthesized metal nanoparticles are evaluated their antimicrobial efficacy against different human pathogenic organisms. The physico-chemical properties of gold nanoparticles were analyzed using different analytical t...

vibrio cholerae is a human pathogen that causes mild to severe diarrheal illnesses and has major public health significance. the aim of this study was to investigate the effects of antimicrobial activity of the gold nanoparticles on vibrio cholera. gold and silver nanoparticles are chemically synthesized. standard strain of vibrio cholerawas cultured in a nutrient broth. minimum inhibitory conc...

Meeting. This periodic gathering brings together chemists, pharmacologists and physicians interested in the medicinal use of these two precious metals. The participants were drawn from 8 countries and three continents. This meeting, because it is small and interdisciplinary, provides an intense interchange of ideas during the formal sessions, and perhaps more importantly, informal discussions s...

Silver and gold, together with copper, form the transition metal group IB elements in the periodic table and possess very different nuclear magnetic resonance (NMR) spectroscopic properties. While there is only one gold isotope ((197)Au), which has a spin of 3/2 and therefore a quadrupole moment, silver occurs in two isotopic forms ((109)Ag and (109)Au), both of which have a spin 1/2 and simila...

According to the unique properties and many applications of nano silver powder, it was prepared from acid leaching tail solution. The low value residual gold and silver ions were occurred with fellow heavy metals as pollutants (Fe2+, Cu 2+ and Zn2+) in acid leaching tail solution in Mouteh gold mine in Iran. Preparation of nano silver particles was achieved in two steps: first, by addition of a...

Metal and alloy nanoparticles are increasingly developed for biomedical applications, while a firm understanding of their biocompatibility is still missing. Various properties have been reported to influence the toxic potential of nanoparticles. This study aimed to assess the impact of nanoparticle size, surface ligands and chemical composition of gold, silver or gold-silver alloy nanoparticles...