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Fabrication and Healing of Faceted Nanopores in Magnesium

Solid-state nanopores have been extensively investigated due to many biological engineering and scientific applications, such as for rapid electrical detection and analysis of biopolymers, powerful DNA detection and genome sequencing technology [1-2]. Herein, we demonstrate that faceted nanopores with various shapes can be successfully fabricated in magnesium via focused electron beam (e-beam) technology inside transmission electron microscope (TEM). Associated with orientation, the nanopore shapes varied when manipulating the e-beam irradiation direction (Figure 1). The characteristics of nanopore shapes can be explained by Wulff construction, and the crystallographic planes corresponding to the edges of nanopores are also discussed in detail [3].