title: Three-dimensional structures of magnesium nanopores.
abstract: The optimization of nanopore-based devices is closely related to the nanopore three-dimensional (3D) structures. In this paper, faceted nanopores were fabricated in magnesium (Mg) by aligning the electron beam (e-beam) along the [0001] direction. Detailed structural characterization by transmission electron microscopy reveals the existence of two 3D structures: hexagonal prism-shaped and hourglass-shaped 3D morphologies. Moreover, the 3D structures of nanopores are also found to depend on the widest nanopore diameter-to-thickness ratio (D/t). A plausible formation mechanism for different 3D structures is discussed. Our results incorporate a critical piece of information regarding the nanopore 3D structures in Mg and may serve as an important design guidance for the size- and shape-controllable fabrication of solid-state nanopores applying the e-beam sculpting technique.
authors.forename: Shujing
authors.initials: S
authors.lastname: Wu
authors.forename: He
authors.initials: H
authors.lastname: Zheng
authors.forename: Shuangfeng
authors.initials: S
authors.lastname: Jia
authors.forename: Huaping
authors.initials: H
authors.lastname: Sheng
authors.forename: Fan
authors.initials: F
authors.lastname: Cao
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Shuaishuai
authors.initials: S
authors.lastname: Hu
authors.forename: Penghui
authors.initials: P
authors.lastname: Zhao
authors.forename: Dongshan
authors.initials: D
authors.lastname: Zhao
authors.forename: Jianbo
authors.initials: J
authors.lastname: Wang