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Topotactic Growth of Edge-Terminated MoS2 from MoO2 Nanocrystals
- Source :
- Dahl-Petersen, C, Sarić, M, Brorson, M, Moses, P G, Rossmeisl, J, Lauritsen, J V & Helveg, S 2018, ' Topotactic Growth of Edge-Terminated MoS 2 from MoO 2 Nanocrystals ', A C S Nano, vol. 12, no. 6, pp. 5351-5358 . https://doi.org/10.1021/acsnano.8b00125, Dahl-Petersen, C, Šarić, M, Brorson, M, Moses, P G, Rossmeisl, J, Lauritsen, J V & Helveg, S 2018, ' Topotactic Growth of Edge-Terminated MoS 2 from MoO 2 Nanocrystals ', ACS Nano, vol. 12, no. 6, pp. 5351-5358 . https://doi.org/10.1021/acsnano.8b00125
- Publication Year :
- 2018
-
Abstract
- Layered transition metal dichalcogenides have distinct physicochemical properties at their edge-terminations. The production of an abundant density of edge structures is, however, impeded by the excess surface energy of edges compared to basal planes and would benefit from insight into the atomic growth mechanisms. Here, we show that edge-terminated MoS2 nanostructures can form during sulfidation of MoO2 nanocrystals by using in situ transmission electron microscopy (TEM). Time-resolved TEM image series reveal that the MoO2 surface can sulfide by inward progression of MoO2(202):MoS2(002) interfaces, resulting in upright-oriented and edge-exposing MoS2 sheets. This topotactic growth is rationalized in the interplay with density functional theory calculations by successive O-S exchange and Mo sublattice restructuring steps. The analysis shows that formation of edge-terminated MoS2 is energetically favorable at MoO2(110) surfaces and provides a necessary requirement for the propensity of a specific MoO2 surface termination to form edge-terminated MoS2. Thus, the present findings should benefit the rational development of transition metal dichalcogenide nanomaterials with abundant edge terminations.
- Subjects :
- Nanostructure
Materials science
Sulfide
Growth mechanism
Sulfidation
General Physics and Astronomy
Topotaxy
02 engineering and technology
010402 general chemistry
MoS
01 natural sciences
Transition metal
General Materials Science
chemistry.chemical_classification
General Engineering
Edge termination
021001 nanoscience & nanotechnology
Surface energy
0104 chemical sciences
chemistry
Nanocrystal
Chemical physics
Density functional theory
In situ transmission electron microscopy
0210 nano-technology
Science, technology and society
MoS2
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Dahl-Petersen, C, Sarić, M, Brorson, M, Moses, P G, Rossmeisl, J, Lauritsen, J V & Helveg, S 2018, ' Topotactic Growth of Edge-Terminated MoS 2 from MoO 2 Nanocrystals ', A C S Nano, vol. 12, no. 6, pp. 5351-5358 . https://doi.org/10.1021/acsnano.8b00125, Dahl-Petersen, C, Šarić, M, Brorson, M, Moses, P G, Rossmeisl, J, Lauritsen, J V & Helveg, S 2018, ' Topotactic Growth of Edge-Terminated MoS 2 from MoO 2 Nanocrystals ', ACS Nano, vol. 12, no. 6, pp. 5351-5358 . https://doi.org/10.1021/acsnano.8b00125
- Accession number :
- edsair.doi.dedup.....85b4c00f066b4db5fa8ed2a1a8f08ac4