A. Karajić, S. Reculusa, M. Heim, P. Garrigue, S. Ravaine, N. Mano, A. Kuhn

Adv. Mater. Interfaces, 2015, in press

We report the bottom-up design of a fully integrated and miniaturized electrochemical cell consisting of two independently addressable macroporous electrodes with well-defined porosity, controllable thickness and easily tunable spacing. The concept is based on the electrodeposition of alternating metal layers of gold and nickel through a colloidal crystal synthesized by the Langmuir-Blodgett technique. The proposed architecture shows good structural stability and a significant increase of active surface area. We demonstrate that electroactive species react efficiently with both electrodes, thus opening up new applications in the field of miniaturized electrochemical devices due to the versatility of this straightforward approach.