Direct Identification of Monolayer Rhenium Diselenide by an Individual Diffraction Pattern

Zhen Fei, Bo Wang, Ching-Hwa Ho, Fang Lin, Jun Yuan, Ze Zhang, Chuanhong Jin

Research output: Contribution to journalArticlepeer-review

Abstract

In the current extensive studies of transition metal dichalcogenides (TMDCs),
compared to hexagonal layered materials, like graphene, hBN and MoS2, low
symmetry layered two‐dimensional (2D) crystals have shown great potential for
applications in anisotropic devices. Rhenium diselenide (ReSe2) has the bulk
space group P1ത and belongs to triclinic crystal system with a deformed cadmium
iodide type structure. Here we propose an electron diffraction based method to
distinguish monolayer ReSe2 membrane from multilayer ReSe2, and its two
different vertical orientations, our method could also be applicable to other low
symmetry crystal systems, including both triclinic and monoclinic lattices, as
long as their third unit‐cell basis vectors are not perpendicular to their basal
planes. Our experimental results are well explained by kinematical electron
diffraction theory and corresponding simulations. The generalization of our
method to other 2D materials, like graphene, is also discussed.
Original languageEnglish
Pages (from-to)2535-2544
Number of pages10
JournalNano Research
Volume10
Issue number7
Early online date19 May 2017
DOIs
Publication statusPublished - 1 Jul 2017

Bibliographical note

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Keywords

  • electron diffraction
  • monolayer
  • reciprocal rel-rod
  • rhenium diselenide

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