Pressure-Induced Formation and Mechanical Properties of 2D Diamond Boron Nitride.

ABSTRACT: Understanding phase transformations in 2D materials can unlock unprecedented developments in nanotechnology, since their unique properties can be dramatically modified by external fields that control the phase change. Here, experiments and simulations are used to investigate the mechanical properties of a 2D diamond boron nitride (BN) phase induced by applying local pressure on atomically thin h-BN on a SiO₂ substrate, at room temperature, and without chemical functionalization. Molecular dynamics (MD) simulations show a metastable local rearrangement of the h-BN atoms into diamond crystal clusters when increasing the indentation pressure. Raman spectroscopy experiments confirm the presence of a pressure-induced cubic BN phase, and its metastability upon release of pressure. Å-i

SUBMITTER: Cellini F 

PROVIDER: S-EPMC7816702 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature