Fig. 2: Nanopore fabrication procedures.
From: Solid-state nanopore systems: from materials to applications
a Focused ion or electron milling; b anodic alumina nanopore; c track etching; d dielectric breakdown; e tunable nanopore; f glass nanopipette; g DNA origami nanopore; h 2D nanopore. Scanning electron micrographs showing the typical nanopore structures, reproduced with permissions from Venta et al.12 (a), Tabrizi et al.15 (b), Xie et al.22 (c), Yanagi et al.25 (d), Willmott et al.30 (e), Karhanek et al.32 (f), Bell et al.36 (g), and Feng et al.90 (h).
