Giant Plasmene Nanosheets, Nanoribbons, and Origami

摘要

We introduce Plasmene in analogy to grapheneas free-standing, one-particle-thick, superlattice sheets of nanoparticles (meta-atoms) from the plasmonic periodic table, which has implications in many important research disciplines. Here, we report on a general bottom-up self-assembly approach to fabricate giant plasmene nanosheets (i.e., plasmene with nanoscale thickness but with macroscopic lateral dimensions) as thin as similar to 40 nm and as wide as similar to 3 mm, corresponding to an aspect ratio of similar to 75 000. In conjunction with topdown lithography, such robust giant nanosheets could be milled into one-dimensional nanoribbons and folded into three-dimensional origami. Both experimental and theoretical studies reveal that our giant plasmene nanosheets are analogues of graphene from the plasmonic nanoparticle family, simultaneously possessing unique structural features and plasmon propagation functionalities.