Quantum confinement in few layer SnS nanosheets

John D. Dwyer, Elizabeth Juarez Diaz, Thomas E. Webber, Adlai Katzenberg, Miguel A. Modestino, Eray S. Aydil

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Orthorhombic tin monosulfide (SnS) consists of layers of covalently bound Sn and S atoms held together by weak van der Waals forces and is a stable two-dimensional material with potentially useful properties in emerging applications such as valleytronics. Large-scale sustainable synthesis of few-layer (e.g., 1-10 layers) SnS is a challenge, which also slows progress in understanding their properties as a function of number of layers. Herein we describe solvothermal synthesis of SnS in water or ethylene glycol. The latter yields a flower-like morphology where the petals are SnS nanoplates and sonication and separation of these flowers via differential centrifugation yields 1-10 layer SnS nanoplates. The direct optical absorption edges of these SnS nanoplates blue-shift due to quantum confinement from 1.33 to 1.88 eV as the thickness (number of layers) is decreased from ∼5 nm (10 layers) to ∼2 nm (4 layers).

Original languageEnglish (US)
Article number245705
JournalNanotechnology
Volume30
Issue number24
DOIs
StatePublished - Apr 1 2019

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Keywords

  • 2D materials
  • quantum confinement
  • SnS

How much support was provided by MRSEC?

  • Primary

Reporting period for MRSEC

  • Period 6

PubMed: MeSH publication types

  • Journal Article

Cite this

Dwyer, J. D., Diaz, E. J., Webber, T. E., Katzenberg, A., Modestino, M. A., & Aydil, E. S. (2019). Quantum confinement in few layer SnS nanosheets. Nanotechnology, 30(24), [245705]. https://doi.org/10.1088/1361-6528/ab0e3e