Experimentally determined edge orientation of triangular crystals of hexagonal boron nitride
Abstract
This work demonstrates a method to directly determine edge orientations of three‐fold symmetric two‐dimensional crystals in real space, without resolving the edge structure. In an annular dark‐field scanning transmission electron microscope, the orientation of an edge is derived from the overall edge direction recorded at a low magnification and the crystal orientation revealed by atomic resolution, element‐contrast imaging at a high magnification. By applying this method, the edge orientation of equilateral triangle‐shaped hexagonal boron nitride (h‐BN) crystals grown by chemical vapor deposition on Cu is experimentally determined for the first time. The experimentally determined nitrogen‐terminated zigzag edges validate the kinetic theory of h‐BN crystal growth, which is a useful case study of the growth of 2D crystals lacking inversion symmetry.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 24, 2017
- Source ID
- 10.1002/pssb.201700069
Entities
People
- Ali Mohsin
- Gerd Duscher
- Gong Gu
- Lei Liu
- Nicholas G. Cross
- Peizhi Liu
Organizations
- Defense Advanced Research Projects Agency
- Oak Ridge National Laboratory
- University of Tennessee