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

doi:10.1016/j.cplett.2019.136781

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

工学研究科・応用化学専攻

研究成果: Article › 査読

4 被引用数 (Scopus)

抄録

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.

本文言語	English
論文番号	136781
ジャーナル	Chemical Physics Letters
巻	735
DOI	https://doi.org/10.1016/j.cplett.2019.136781
出版ステータス	Published - 2019 11月 16

ASJC Scopus subject areas

物理学および天文学（全般）
物理化学および理論化学

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10.1016/j.cplett.2019.136781

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引用スタイル

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title = "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",

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.",

keywords = "Contact angle, Graphene, Ionic liquid, Vacuum, Wettability",

author = "Takuya Kinoshita and Shingo Maruyama and Yuji Matsumoto",

note = "Funding Information: This work was partially supported by a Giant-in Aid for Scientific Research (No. 15K13613 and No. 19H02589 ) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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T1 - 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

AU - Kinoshita, Takuya

AU - Maruyama, Shingo

AU - Matsumoto, Yuji

N1 - Funding Information: This work was partially supported by a Giant-in Aid for Scientific Research (No. 15K13613 and No. 19H02589 ) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. Publisher Copyright: © 2019 Elsevier B.V.

PY - 2019/11/16

Y1 - 2019/11/16

N2 - 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.

AB - 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.

KW - Contact angle

KW - Graphene

KW - Ionic liquid

KW - Vacuum

KW - Wettability

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