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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Freire, Rafael L. H. [1, 2] ; Masteghin, Mateus G. [3, 1] ; Da Silva, Juarez L. F. [4] ; Orlandi, Marcelo O. [1]
Total Authors: 4
[1] Sao Paulo State Univ, Inst Chem, Dept Phys Chem, BR-14800060 Araraquara, SP - Brazil
[2] Beijing Computat Sci Res Ctr, Beijing 100193 - Peoples R China
[3] Univ Surrey, Adv Technol Inst, Guildford GU2 7XH, Surrey - England
[4] Univ Sao Paulo, Sao Carlos Inst Chem, POB 780, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Web of Science Citations: 0

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 angstrom(-2)), indicating its vdW interaction nature, whereas for SnO is slightly stronger (26 meV angstrom(-2)). Then, the Dual Beam Microscope nanomanipulation of the Sn3O4 nanobelts revealed the weak layer-layer interactions along their stacking direction (plane (010)). 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. (AU)

FAPESP's process: 17/26219-0 - Study of single element chemical sensor devices based on semiconducting metal oxide materials
Grantee:Marcelo Ornaghi Orlandi
Support type: Regular Research Grants
FAPESP's process: 17/11631-2 - Computational material science and chemistry
Grantee:Juarez Lopes Ferreira da Silva
Support type: Research Grants - Research Centers in Engineering Program