Selective self-assembly of 2,3-diaminophenazine molecules on MoSe2 mirror twin boundaries

Xiaoyue He, Lei Zhang, Rebekah Chua, Ping Kwan Johnny Wong, Arramel Arramel, Yuan Ping Feng, Shi Jie Wang, Dongzhi Chi, Ming Yang (), Yu Li Huang () and Andrew Thye Shen Wee ()
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Xiaoyue He: National University of Singapore, 2 Science Drive 3
Lei Zhang: National University of Singapore, 2 Science Drive 3
Rebekah Chua: National University of Singapore, 2 Science Drive 3
Ping Kwan Johnny Wong: National University of Singapore
Arramel Arramel: National University of Singapore, 2 Science Drive 3
Yuan Ping Feng: National University of Singapore, 2 Science Drive 3
Shi Jie Wang: A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis
Dongzhi Chi: A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis
Ming Yang: A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis
Yu Li Huang: National University of Singapore, 2 Science Drive 3
Andrew Thye Shen Wee: National University of Singapore, 2 Science Drive 3

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract The control of the density and type of line defects on two-dimensional (2D) materials enable the development of new methods to tailor their physical and chemical properties. In particular, mirror twin boundaries (MTBs) on transition metal dichacogenides have attracted much interest due to their metallic state with charge density wave transition and spin-charge separation property. In this work, we demonstrate the self-assembly of 2,3-diaminophenazine (DAP) molecule porous structure with alternate L-type and T-type aggregated configurations on the MoSe2 hexagonal wagon-wheel pattern surface. This site-specific molecular self-assembly is attributed to the more chemically reactive metallic MTBs compared to the pristine semiconducting MoSe2 domains. First-principles calculations reveal that the active MTBs couple with amino groups in the DAP molecules facilitating the DAP assembly. Our results demonstrate the site-dependent electronic and chemical properties of MoSe2 monolayers, which can be exploited as a natural template to create ordered nanostructures.

Date: 2019
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DOI: 10.1038/s41467-019-10801-0

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