Nanoporous metals with controlled multimodal pore size distribution

J Am Chem Soc. 2003 Jul 2;125(26):7772-3. doi: 10.1021/ja035318g.


A simple two-step dealloying strategy is described to make free-standing metal membranes with hierarchical porous architecture. This structure has a bimodal pore size distribution composed of large porosity channels and small porosity channel walls, where each pore size can be tailored independently of the others. A new gas-phase electroless plating technique was also developed here that could be used to uniformly fill porous structures with pore size as small as 10 nm.