Elastic Properties of Few Nanometers Thick Polycrystalline MoS<inf>2</inf> Membranes: A Nondestructive Study

B. Graczykowski, M. Sledzinska, M. Placidi, D. Saleta Reig, M. Kasprzak, F. Alzina, C. M. Sotomayor Torres

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Abstract

© 2017 American Chemical Society. The performance gain-oriented nanostructurization has opened a new pathway for tuning mechanical features of solid matter vital for application and maintained performance. Simultaneously, the mechanical evaluation has been pushed down to dimensions way below 1 μm. To date, the most standard technique to study the mechanical properties of suspended 2D materials is based on nanoindentation experiments. In this work, by means of micro-Brillouin light scattering we determine the mechanical properties, that is, Young modulus and residual stress, of polycrystalline few nanometers thick MoS2 membranes in a simple, contact-less, nondestructive manner. The results show huge elastic softening compared to bulk MoS2, which is correlated with the sample morphology and the residual stress.
Original languageEnglish
Pages (from-to)7647-7651
JournalNano Letters
Volume17
Issue number12
DOIs
Publication statusPublished - 13 Dec 2017

Keywords

  • Molybdenum disulfide
  • elastic properties
  • micro-Brillouin light scattering
  • ultrathin membranes

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