Figure 2
From: Three-dimensional nanowire networks fabricated by ion track nanotechnology and their applications
Schematics and scanning electron microscopy images of various pore geometries in ion track-etched membranes illustrating channels with (a) asymmetric bullet-like and (b) conical shapes, as well as (c) symmetric cylindrical parallel and (d) interconnected arrangements. Partially adapted from L. Burr, PhD Thesis, Technische Universität Darmstadt, 2017 and L. Movsesyan, PhD Thesis, Technische Universität Darmstadt, 2017