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다차원 탄소재료 연구단
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Environment-dependent edge reconstruction of transition metal dichalcogenides: a global search

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Title
Environment-dependent edge reconstruction of transition metal dichalcogenides: a global search
Author(s)
Da, Li; Feng Ding
Publication Date
2020-12
Journal
Materials Today Advances, v.8, pp.1 - 8
Publisher
Elsevier
Abstract
The properties of an edge of a transition metal dichalcogenide (TMDC) sensitively depend on its atomic structure; therefore, knowing the exact structure is a precondition for predicting the applications of TMDC, such as in catalysis. Although some edge reconstructions of TMDCs have been reported in previous studies, a global search of TMDC edge structures and calculations of their stabilities are still absent. Here, we propose an approach to explore all possible edge reconstructions of a monolayer TMDC by employing the particle swarm optimization algorithm and first-principles calculations. Taking the most studied TMDC material, MoS2, as a representative, we have built a database of the edge structures of TMDCs. Including the five experimentally observed edges, the thirty-four most stable edges with various sulfur concentrations are predicted for the first time. The most stable edge structures of 1H–MoS2 in different environments along both the armchair and zigzag directions have been predicted and agree well with experimental observations. A specific edge of 1H–MoS2 in the database can be stabilized by modulating the chemical composition of the atoms, which offers an efficient way to tune the properties of TMDC nanostructures, such as TMDC quantum dots and/or nanoribbons
URI
https://pr.ibs.re.kr/handle/8788114/9027
DOI
10.1016/j.mtadv.2020.100079
ISSN
2590-0498
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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