Different healing characteristics of thiol-bearing molecules on CVD-grown MoS2

Giovanna Feraco, Oreste De Luca, Ali Syari’ati, Sardar Hameed, Abdurrahman Ali El Yumin, Jianting Ye, Raffaele G. Agostino, Petra Rudolf*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
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Abstract

Vacancies in atomically thin molybdenum disulphide play an essential role in controlling its optical and electronic properties, which are crucial for applications in sensorics, catalysis or electronics. For this reason, defect engineering employing thiol-terminated molecules is used to heal and/or functionalise defective nanosheets. In this work, chemical vapour deposition-grown MoS2 with different defect densities was functionalised with three molecules: 4-aminothiophenol (ATP), biphenyl-4-thiol (BPT) and 4-nitrothiophenol (NTP). The molecules’ efficacy in functionalising MoS2 was probed by x-ray photoelectron, Raman and photoluminescence (PL) spectroscopy. The results show that exposing a defective single layer of MoS2 to either ATP, BPT or NTP molecules heals the defects, however the chemical structure of these molecules affects the optical response and only for BPT the PL intensity increases.

Original languageEnglish
Article number034006
Number of pages10
JournalJPhys Materials
Volume6
Issue number3
DOIs
Publication statusPublished - 1-Jul-2023

Keywords

  • functionalisation
  • molybdenum disulphide
  • photoluminescence
  • x-ray photoelectron spectroscopy

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