Quantitative insights into the growth mechanisms of nanopores in hexagonal boron nitride

Ki Kang Kim (1) , Young Hee Lee (2, 3) , Ouafi Mouhoub (4, 5) , Rafael Martinez-Gordillo (6) , Jaysen Nelayah (4) , Guillaume Wang (4) , Ji-Hoon Park (2, 3) , Young Hee Lee , Christophe Bichara (6) , Annick Loiseau (5) , Christian Ricolleau (4) , Hakim Amara (5, 7) , Damien Alloyeau (4)

1 Department of Energy & Materials Engineering - Dongguk University, Seoul
2 Center for Integrated Nanostructure Physics, Institute for Basic Science
3 Department of Energy Science, Sungkyunkwan University
4 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
5 LEM - ONERA - CNRS - Laboratoire d'étude des microstructures [Châtillon]
6 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille
7 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques

The formation of nanopores under electron irradiation is an ideal process to quantify chemical bonds in 2D materials. Nowadays, High Resolution Transmission Electron Microscopy (HRTEM) allows investigating such nucleation and growth phenomena with incomparable spatial and temporal resolution. Moreover, theoretical calculations are usually exploited to confirm characteristic features of these atomicscale observations. Nevertheless, the full understanding of the ejection mechanisms of atoms requires studying in details the interplay between the very dynamic edge structure of expanding nanopores and the displacement energy of edge atoms (E D). Here, the dynamics of triangular nanopores in hexagonal boron nitride (h-BN) under various electron dose rates was followed by aberration-corrected HRTEM with high

Domaines: Physique [physics]; Science des matériaux [cond-mat.mtrl-sci]

Ki Kang Kim, Young Hee Lee, Ouafi Mouhoub, Rafael Martinez-Gordillo, Jaysen Nelayah, et al.. Quantitative insights into the growth mechanisms of nanopores in hexagonal boron nitride. Physical Review Materials, 2020, 4 (1), ⟨10.1103/PhysRevMaterials.4.014005⟩. ⟨hal-03034741v2⟩