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*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

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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.

Originele taal-2English
Aantal pagina's10
TijdschriftJPhys Materials
Nummer van het tijdschrift3
StatusPublished - 1-jul.-2023

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