Surface effects on the radiation response of nanoporous Au foams

EG Fu and M Caro and LA Zepeda-Ruiz and YQ Wang and K Baldwin and E Bringa and M Nastasi and A Caro, APPLIED PHYSICS LETTERS, 101, 191607 (2012).

DOI: 10.1063/1.4764528

We report on an experimental and simulation campaign aimed at exploring the radiation response of nanoporous Au (np-Au) foams. We find different defect accumulation behavior by varying radiation dose-rate in ion- irradiated np-Au foams. Stacking fault tetrahedra are formed when np-Au foams are irradiated at high dose-rate, but they do not seem to be formed in np-Au at low dose-rate irradiation. A model is proposed to explain the dose-rate dependent defect accumulation based on these results. (C) 2012 American Institute of Physics. http://dx.doi.org/10.1063/1.4764528

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