Fig. 1. Schematic illustrating the fabrication process of the new-type PAA: Step I. Synthesis of conventional PAA as nanoimprint stamps. Step II. Pattern transfer onto aluminum by NIL. Step III. Anodization of pre-patterned aluminum. (a) Pretreated Al sheets, (b) PAA stamp, (c) direct nanoimprint using PAA stamps, (d) Al sheets with pre-patterned graphite lattice concaves, (e) new-type PAA with graphite lattice pores.
