Tunable mechanical properties in nanoscale porous gold

By Eileen De Guire / June 13, 2011

SEM of nanoporous gold structure. Credit: Helmholtz Association of German Research Centers. Several recent, unrelated posts have been about materials with nanoscale porosity (diamond aerogels, chalcogenide PCMM). Here is another one, but perhaps this one will prove to be not so unrelated. In the June 3 issue of Science, authors Jin and Weissmüller describe a…

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Nanoscale intergranular films shed light on grain boundary behavior

By Eileen De Guire / May 26, 2011

During one of their studies, grain boundary researchers began with gold films broken into particles (via annealing) dispersed across a sapphire substrate. Credit: Baram, et al; Technion. Materials scientists have long recognized that grain boundaries and interfaces can limit a material’s bulk properties, especially at high temperatures. Significant research effort has gone into understanding their nature with an eye to…

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