Fig. 1: 2D materials on nanocones.
From: Programmable nanowrinkle-induced room-temperature exciton localization in monolayer WSe2
a Cartoon of wrinkle formation when a sheet conforms to a conical feature. b SEM micrographs of wrinkles in monolayer WSe2 on top of isolated nanocones. Scale bars are 200 nm. c Fabrication flow for the production of nanocone arrays. Abbreviations used: Si/SiO2 silicon substrate with oxide layer, Au gold, PMMA poly(methyl methacrylate), Al2O3 aluminum oxide, Ar+ argon ions. d An illustration of the near-field measurement depicting a gold-coated AFM probe scanning over wrinkles in a sheet of WSe2 on top of an array of nanocones. The tip and sample are illuminated from the side with a laser, which creates a local hotspot directly underneath the apex. (Drawing not to scale).
