Atomic mechanism of the semiconducting-to-metallic phase transition in single-layered MoS2
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- 20 April 2014
- journal article
- Published by Springer Science and Business Media LLC in Nature Nanotechnology
- Vol. 9 (5), 391-396
- https://doi.org/10.1038/nnano.2014.64
Abstract
Phase transitions can be used to alter the properties of a material without adding any additional atoms and are therefore of significant technological value. In a solid, phase transitions involve collective atomic displacements, but such atomic processes have so far only been investigated using macroscopic approaches. Here, we show that in situ scanning transmission electron microscopy can be used to follow the structural transformation between semiconducting (2H) and metallic (1T) phases in single-layered MoS2, with atomic resolution. The 2H/1T phase transition involves gliding atomic planes of sulphur and/or molybdenum and requires an intermediate phase (α-phase) as a precursor. The migration of two kinds of boundaries (β- and γ-boundaries) is also found to be responsible for the growth of the second phase. Furthermore, we show that areas of the 1T phase can be controllably grown in a layer of the 2H phase using an electron beam.Keywords
This publication has 31 references indexed in Scilit:
- The chemistry of two-dimensional layered transition metal dichalcogenide nanosheetsNature Chemistry, 2013
- Graphene cleans up waterNature Nanotechnology, 2012
- Use of stable isotope labeling by amino acids in cell culture as a spike-in standard in quantitative proteomicsNature Protocols, 2011
- Structure of Restacked MoS2 and WS2 Elucidated by Electron CrystallographyJournal of the American Chemical Society, 1999
- Encapsulation of polymers into MoS2 and metal to insulator transition in metastable MoS2Journal of the Chemical Society, Chemical Communications, 1993
- 1T-MoS2, a new metallic modification of molybdenum disulfideJournal of the Chemical Society, Chemical Communications, 1992
- Structural destabilization induced by lithium intercalation in MoS2 and related compoundsCanadian Journal of Physics, 1983
- Band Structures of Transition-Metal-Dichalcogenide Layer CompoundsPhysical Review B, 1973
- A study of the lubricating mechanism of molybdenum disulfideWear, 1972
- Molybdenum disulfide as a lubricant: A review of the fundamental knowledgeWear, 1967