Galvanostatic Dealloying for Fabrication of Constrained Blanket Nanoporous Gold Films

摘要

A system and method for fabricating a blanket metallic nanoporous film positioned a substrate in an electrochemical cell using a galvanostatic dealloying method where areal current density is directly controlled and the process is terminated when the potential reaches a predetermined cut-off value. A blanket metallic nanoporous film attached to a substrate that is substantially crack free, has a bicontinuous porous structure with the interconnecting ligaments having a length scale from 10 nm to 30 nm, and has a continuous interconnected porous region having a length scale from 10 nm to 30 nm.