Comments on "Room temperature interfacial reactions in electrodeposited Au/Sn couples"

Recently, Tang et al. (Acta Mater. 56 (2008) 5818) published a paper explaining room temperature growth of the phases in the Au/Sn system. In their analysis, they considered Au as the only mobile species for all the product phases, and Sn as virtually immobile. It is shown here that this analysis is not correct, since Sn has a higher diffusion rate through the AuSn4 phase. On the other hand, the mobilities of species in the AuSn2 phase are as yet unknown.

Rudolf and Antoinette von Kahler in living room; Vienna-Doebling Architecture; Residences

Digital Image

Collecting Planks for Kumbal (Small Room ), Guards do not Interfere Artworks

Digital Image

Collecting Planks for Kumbal (Small Room) Artworks

Postwar Version of F 39343

Living room of Henrietta Gottschalk nee Rothschild; Marienstrasse, Hannover, Germany.

The family has been curious about the family tree on the wall. Family lore suggests that it was produced by French POWs during WWI

Aenny Catzenstein nee Gottschalk in her living room; London.

Digital Image

Printing room 1; Paul I. Landmann Manufacturing Factory; Mannheim-Neckarau Business Establishments; Factories

"Drucksaal 1"

Printing room; Paul I. Landmann Manufacturing Factory; Mannheim-Neckarau Business Establishments; Factories

"Umdruckerei"

Stamping room; Paul I. Landmann manufacturing factory; Mannheim-Neckarau Business Establishments; Factories

"Pragesaal"

Amide-based Room Temperature Molten Salt as Solvent cum Stabilizer for Metallic Nanochains

A simple and efficient method for spontaneous organization of long assemblies of gold nanoparticles is described. This is achieved in a molten solvent containing acetamide, urea and ammonium nitrate that acts as a solvent cum stabilizer. There is no external aggregating agent or stabilizing agent added to the system. Depending on the concentration of the metal salt in the ternary melt, either chain-like assemblies or individual nanoparticles could be obtained. The amine groups present in the components of the melt (acetamide and urea) help in the stabilization of nanoparticles. Ammonium ions present in the eutectic mixture are likely to assist in the organization of the particles. The method is simple, highly reproducible and does not require any templating agent for the formation of chain-like assemblies.

Portrait of Henny Molling nee Meyerhof and her daughter Therese Molling in living room; Germany.

Digital Image

Dining room; Mosse family residence; Berlin Architecture; Residences; Interior

Digital Image