Coherent atomic and electronic heterostructures of single-layer MoS 2

Goki Eda, Takeshi Fujita, Hisato Yamaguchi, Damien Voiry, Mingwei Chen, Manish Chhowalla

Research output: Contribution to journalArticle

536 Citations (Scopus)

Abstract

Nanoscale heterostructures with quantum dots, nanowires, and nanosheets have opened up new routes toward advanced functionalities and implementation of novel electronic and photonic devices in reduced dimensions. Coherent and passivated heterointerfaces between electronically dissimilar materials can be typically achieved through composition or doping modulation as in GaAs/AlGaAs and Si/NiSi or heteroepitaxy of lattice matched but chemically distinct compounds. Here we report that single layers of chemically exfoliated MoS 2 consist of electronically dissimilar polymorphs that are lattice matched such that they form chemically homogeneous atomic and electronic heterostructures. High resolution scanning transmission electron microscope (STEM) imaging reveals the coexistence of metallic and semiconducting phases within the chemically homogeneous two-dimensional (2D) MoS 2 nanosheets. These results suggest potential for exploiting molecular scale electronic device designs in atomically thin 2D layers.

Original languageEnglish
Pages (from-to)7311-7317
Number of pages7
JournalACS nano
Volume6
Issue number8
DOIs
Publication statusPublished - Aug 28 2012

Keywords

  • 2D crystals
  • MoS
  • electron microscopy
  • heterostrucure
  • interface

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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