Ionic liquid wettability of CVD-grown graphene on Cu/α-Al2O3(0 0 0 1) characterized by in situ contact angle measurement in a vacuum

Takuya Kinoshita, Shingo Maruyama, Yuji Matsumoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Intrinsic wettability of CVD-grown graphene on Cu/α-Al2O3(0 0 0 1) to ionic liquid [emim][NTf2] was investigated by in situ contact angle measurement in a high vacuum. The contact angles increased with the coverage of graphene from a complete wetting regime on the clean Cu surface to a partial wetting regime on the surface fully covered with graphene. The measured contact angles were well explained by the Cassie equation. Since the contact angle of graphene was close to that of bulk HOPG, it is indicated that the first layer graphene is just enough to govern its wettability.

Original languageEnglish
Article number136781
JournalChemical Physics Letters
Volume735
DOIs
Publication statusPublished - 2019 Nov 16

Keywords

  • Contact angle
  • Graphene
  • Ionic liquid
  • Vacuum
  • Wettability

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of 'Ionic liquid wettability of CVD-grown graphene on Cu/α-Al<sub>2</sub>O<sub>3</sub>(0 0 0 1) characterized by in situ contact angle measurement in a vacuum'. Together they form a unique fingerprint.

Cite this