journal article·2022-02

Intrinsic Wettability in Pristine Graphene

Jincan Zhang, Kaicheng Jia, Yongfeng Huang, Xiaoting Liu, Qiuhao Xu, Wendong Wang, Rui Zhang, Bingyao Liu, Liming Zheng, Heng Chen, Peng Gao, Sheng Meng, Li Lin, Hailin Peng, Zhongfan Liu

Advanced Materials· Volume 34· Issue 6
Publisher page

Abstract

Abstract The wettability of graphene remains controversial owing to its high sensitivity to the surroundings, which is reflected by the wide range of reported water contact angle (WCA). Specifically, the surface contamination and underlying substrate would strongly alter the intrinsic wettability of graphene. Here, the intrinsic wettability of graphene is investigated by measuring WCA on suspended, superclean graphene membrane using environmental scanning electron microscope. An extremely low WCA with an average value ≈30° is observed, confirming the hydrophilic nature of pristine graphene. This high hydrophilicity originates from the charge transfer between graphene and water molecules through H–π interaction. The work provides a deep understanding of the water–graphene interaction and opens up a new way for measuring the surface properties of 2D materials.
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Research context

OpenAlex topics: Graphene research and applications · Nanopore and Nanochannel Transport Studies · Membrane Separation Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Nanochemistry Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 P. R. China

Beijing Graphene Institute Beijing 100095 P. R. China

Department of Engineering University of Cambridge Cambridge CB3 0FA UK

Academy for Advanced Interdisciplinary Studies Peking University Beijing 100871 P. R. China

Songshan Lake Materials Laboratory Dongguan Guangdong 523808 P. R. China

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China

School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 P. R. China

Department of Physics and Astronomy University of Manchester Manchester M13 9PL UK

Electron Microscopy Laboratory and International Center for Quantum Materials School of Physics Peking University Beijing 100871 P. R. China

Collaborative Innovation Center of Quantum Matter Beijing 100871 P. R. China

Materials Science and Engineering National University of Singapore Singapore 119077 Singapore

Funding

National Basic Research Program of China · National Natural Science Foundation of China

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