Silver has been in use since time immemorial in the form of metallic silver, silver nitrate, silver sulfadiazine for the treatment of burns, wounds and several bacterial properties of silver nanoparticles pdf. But due to the emergence of several antibiotics the use of these silver compounds has been declined remarkably.
Nanotechnology is gaining tremendous impetus in the present century due to its capability of modulating metals into their nanosize, which drastically changes the chemical, physical and optical properties of metals. Metallic silver in the form of silver nanoparticles has made a remarkable comeback as a potential antimicrobial agent. The use of silver nanoparticles is also important, as several pathogenic bacteria have developed resistance against various antibiotics. Hence, silver nanoparticles have emerged up with diverse medical applications ranging from silver based dressings, silver coated medicinal devices, such as nanogels, nanolotions, etc.
Check if you have access through your login credentials or your institution. What are Corrected Proof articles? 68 55 55 55 14. 18 45 45 0 12. Today the synthesis of silver nanoparticles is very common due to their numerous applications in various fields. Silver nanoparticles have unique properties such as: optical and catalytic properties, which, depend on the size and shape of the produced nanoparticles. So, today the production of silver nanoparticles with different shapes which have various uses in different fields such as medicine, are noted by many researchers.
This article, is an attempt to present an overview of the shape-controlled synthesis of silver nanoparticles using various methods. Peer review under responsibility of King Saud University. Production and hosting by Elsevier B. This is a good article. Follow the link for more information.
This article is about the chemical element. Silver is extremely ductile, and can be drawn into a monoatomic wire. This distinctive electron configuration, with a single electron in the highest occupied s subshell over a filled d subshell, accounts for many of the singular properties of metallic silver. 12, where only the single 5s electron is delocalized, similarly to copper and gold. At wavelengths shorter than 450 nm, silver’s reflectivity is inferior to that of aluminium and drops to zero near 310 nm. Zinc-silver alloys with low zinc concentration may be considered as face-centred cubic solid solutions of zinc in silver, as the structure of the silver is largely unchanged while the electron concentration rises as more zinc is added.
This almost equal abundance is rare in the periodic table. Ag with a half-life of 7. Ag with a half-life of 3. Ag with a half-life of 6. Silver is a rather unreactive metal. 1 oxidation state, reflecting the increasingly limited range of oxidation states along the transition series as the d-orbitals fill and stabilize. The precipitation of copper in ancient silver can be used to date artifacts, as copper is nearly always a constituent of silver alloys.
O, upon the addition of alkali. O which behaves as a metallic conductor. S, is very readily formed from its constituent elements and is the cause of the black tarnish on some old silver objects. They can all be obtained by the direct reaction of their respective elements.