Journal
NANOSCALE
Volume 9, Issue 29, Pages 10312-10320Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr02941a
Keywords
-
Categories
Funding
- National Basic Research Program of China [2014CB932500, 2015CB921004]
- National Science Foundation of China [51472215, 51222202]
- 111 project [B16042]
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics [MCMS-0414G01]
- EPSRC (UK) [EP/G070326, EP/K013564/1]
- Pao Yu-Kong International Foundation for a Chair Professorship in ZJU
- Engineering and Physical Sciences Research Council [EP/G070474/1, EP/P022561/1, EP/G070326/1] Funding Source: researchfish
- EPSRC [EP/G070326/1, EP/P022561/1, EP/G070474/1] Funding Source: UKRI
Ask authors/readers for more resources
As a common type of structural defect, grain boundaries (GBs) play an important role in tailoring the physical and chemical properties of bulk crystals and their two-dimensional (2D) counterparts such as graphene and molybdenum disulfide (MoS2). In this study, we explore the atomic structures and dynamics of three kinds of high-symmetry GBs (alpha, beta and gamma) in monolayer MoS2. Atomic-resolution transmission electron microscopy (TEM) is used to characterize their formation and evolutionary dynamics, and atomistic simulation based analysis explains the size distribution of alpha-type GBs observed under TEM and the inter-GB interaction, revealing the stabilization mechanism of GBs by pre-existing sulfur vacancies. The results elucidate the correlation between the observed GB dynamics and the migration of sulfur atoms across GBs via a vacancy-mediated mechanism, offering a new perspective for GB engineering in monolayer MoS2, which may be generalized to other transition metal dichalcogenides.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available