Tunable hierarchical macro/mesoporous gold microwires fabricated by dual-templating and dealloying processes.

摘要: Tailor-made highly ordered macro/mesoporous hierarchical metal architectures have been created by combining sphere lithography, membrane template electrodeposition and alloy-etching processes. The new double-template preparation route involves the of Au/Ag alloy within interstitial (void) spaces polystyrene (PS) microspheres which are closely packed micropores a polycarbonate (PC), followed dealloying Ag component dissolution microsphere templates. net results such lithography silver etching is creation regular three-dimensional gold architecture with well-controlled sizes shapes. morphology porosity porous structures can be tailored controlling conditions, as composition mixture plating solution, size template, or time. Such tunable offer control electrochemical reactivity fuel mass transport, illustrated for enhanced oxygen reduction reaction (ORR) hydrogen-peroxide detection. double templated method provides an attractive preparing controllable multiscale materials diverse morphologies based on different hence holds considerable promise designing electrocatalytic bioelectrocatalytic surfaces variety sensing energy applications.