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

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

  • Nat Commun. 2019 Jun 28;10(1):2847. doi: 10.1038/s41467-019-10801-0.
Xiaoyue He 1,  Lei Zhang 1,  Rebekah Chua 1 2,  Ping Kwan Johnny Wong 3,  Arramel Arramel 1,  Yuan Ping Feng 1,  Shi Jie Wang 4,  Dongzhi Chi 4,  Ming Yang 5,  Yu Li Huang 6 7,  Andrew Thye Shen Wee 8 9
Affiliations

Affiliations

  • 1 Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore.
  • 2 NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore.
  • 3 Centre for Advanced 2D Materials (CA2DM) and Graphene Research Centre (GRC), National University of Singapore, Singapore, 117546, Singapore.
  • 4 Institute of Materials Research & Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, Singapore, 138634, Singapore.
  • 5 Institute of Materials Research & Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, Singapore, 138634, Singapore. yangm@imre.a-star.edu.sg.
  • 6 Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore. chocosea@gmail.com.
  • 7 Institute of Materials Research & Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, Singapore, 138634, Singapore. chocosea@gmail.com.
  • 8 Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore. phyweets@nus.edu.sg.
  • 9 Centre for Advanced 2D Materials (CA2DM) and Graphene Research Centre (GRC), National University of Singapore, Singapore, 117546, Singapore. phyweets@nus.edu.sg.
PMID: 31253803 DOI: 10.1038/s41467-019-10801-0
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.

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