Superacid Treatment on Transition Metal Dichalcogenides

Daisuke Kiriya*, Der Hsien Lien

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Superacids are strong acids with an acidity higher than pure sulfuric acid. Recently, superacid treatment of monolayer transition metal dichalcogenide (TMDC) flakes, such as MoS2 and WS2, has shown a dramatic enhancement of optical properties, such as photoluminescence (PL) intensity. The superacid molecule is bis(trifluoromethane)sulfonimide (TFSI). In this review paper, we summarize and discuss the recent works and the current understanding of the TFSI treatment, and finally, we describe the outlook of the treatment on monolayer TMDCs.

Original languageEnglish
Article number034002
JournalNano Express
Issue number3
StatePublished - 1 Sep 2022


  • electroluminescence
  • molecular chemistry
  • photoluminescence
  • superacid
  • transition metal dichalcogenides (TMDCs)


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