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Sn₃O₄ exfoliation process investigated by density functional theory and modern scotch-tape experiment

Freire, Rafael L.H., Masteghin, Mateus G., Da Silva, Juarez L.F. and Orlandi, Marcelo O. (2019) Sn₃O₄ exfoliation process investigated by density functional theory and modern scotch-tape experiment Computational Materials Science, 170, 109160. pp. 109160-1.

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Abstract

Van der Waals (vdW) layered materials have been receiving a great deal of attention, especially after the scotch-tape experiment using graphite and the unique properties of graphene. Sn₃O₄, which also presents a layered structure, has been widely employed in a variety of technologies, but without further understanding of its bulk properties. For the first time, a modern Scotch-tape nanomanipulation experiment carried on a Dual Beam Microscope is combined with Density Functional Theory to investigate the Sn₃O₄ bulk properties. Theoretically, we have shown that the interaction energy between Sn₃O₄ layers are in the same order of graphene layers (21 meV Å⁻²), indicating its vdW interaction nature, whereas for SnO is slightly stronger (26 meV Å⁻²). Then, the Dual Beam Microscope nanomanipulation of the Sn₃O₄ nanobelts revealed the weak layer-layer interactions along their stacking direction (plane (0 1 0)). Comparatively, when probing SnO and SnO₂ nanobelts, no exfoliation could be seen. The study of Sn₃O₄ electronic structure properties also presents the important role of the interfacial region to the valence and conduction band and, consequently, to the material band-gap. The outcome of this study will help improving some applications, e.g., knowing the total and local density of states can help understanding surface band bending following gases adsorption. To the best of our knowledge, this is the first study to show, combining experimental and theoretical techniques, Sn₃O₄ as a promising 2D material.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Freire, Rafael L.H.
Masteghin, Mateus G.m.masteghin@surrey.ac.uk
Da Silva, Juarez L.F.
Orlandi, Marcelo O.
Date : December 2019
DOI : 10.1016/j.commatsci.2019.109160
Copyright Disclaimer : © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Semiconductors; Sn3O4; Density functional theory; Ab initio simulations; FIB
Depositing User : Clive Harris
Date Deposited : 15 Aug 2019 09:00
Last Modified : 15 Aug 2019 09:00
URI: http://epubs.surrey.ac.uk/id/eprint/852414

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