Abstract
Mirror twin boundaries (MTBs) have brought intriguing one-dimensional physics into the host 2D crystal. In this letter, we reported a chalcogen atom exchange route to induce MTBs into as-formed MoS2 monolayers via post-synthesis tellurium doping. Results from annular dark-field scanning transition electron microscope (ADF-STEM) characterizations revealed that tellurium substituted the sulfur sublattices of MoS2 preferentially around the edge areas. A large number of MTBs in a configuration of 4|4P-Te was induced therein. Analysis of the lattice structures around MTBs revealed that such a tellurium-substitution-induced MTB formation is an energy-favored process to reduce the strain upon a high ratio of tellurium doping.
Highlights
Defects play important roles in tailoring the properties and performance of materials, and their influence may become more deterministic in atomically thin two-dimensional (2D) materials with a reduced dimensionality, such as graphene and transition metal dichalcogenides (TMDs) [1]
We demonstrate that post-synthesis tellurium doping can induce abundant
2 flakes: all critical temperature for complete miscibility of MoS2(1-x)Te2x alloy is 493K, and the doping temperature their edges appeared in brighter contrast pink), indicating tellurium for tellurium in our experiments was 750(arrowed
Summary
Defects play important roles in tailoring the properties and performance of materials, and their influence may become more deterministic in atomically thin two-dimensional (2D) materials with a reduced dimensionality, such as graphene and transition metal dichalcogenides (TMDs) [1]. Among these defects, mirror twin boundary (MTB), denoted as inversion domain boundary (IDB), is a special type of one-dimensional (1D) defect that connects two neighboring domains with a misorientation angle of 60◦ with respect to each other. Mirror twin boundary (MTB), denoted as inversion domain boundary (IDB), is a special type of one-dimensional (1D) defect that connects two neighboring domains with a misorientation angle of 60◦ with respect to each other Depending on their atomic configurations, MTBs can be classified into two primary types: 4|4P and 4|4E. Both of them consist of successive four-member atomic rings in chains.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
