Tuning the ligament/channel size of nanoporous copper by temperature control†
Abstract
Nanoporous Cu powders have been fabricated through mechanical alloying and subsequent dealloying. The ligament/channel size of as small as 21.3 ± 2.7 nm has been obtained by dealloying as-milled Al–Cu powders in a NaOH solution at room temperature, and can be tuned by changing the dealloying temperature. The surface diffusivity of Cu adatoms and mean