Intrinsic Wettability in Pristine Graphene

被引：96

作者：

Zhang, Jincan ^{[1
,2
,3
,4
]}

Jia, Kaicheng ^{[1
,2
]}

Huang, Yongfeng ^{[5
,6
,7
]}

Liu, Xiaoting ^{[1
,2
,4
]}

Xu, Qiuhao ^{[6
,7
,8
]}

Wang, Wendong ^{[9
]}

Zhang, Rui ^{[9
]}

Liu, Bingyao ^{[2
,4
,10
,11
]}

Zheng, Liming ^{[1
,2
]}

Chen, Heng ^{[1
,2
]}

Gao, Peng ^{[10
,11
,12
]}

Meng, Sheng ^{[5
,6
,7
,8
]}

Lin, Li ^{[13
]}

Peng, Hailin ^{[1
,2
]}

Liu, Zhongfan ^{[1
,2
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Ctr Nanochem,Beijing Sci & Engn Ctr Nanocarbons, Beijing 100871, Peoples R China

[2] Beijing Graphene Inst, Beijing 100095, Peoples R China

[3] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England

[4] Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China

[5] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China

[6] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[7] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[8] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

[9] Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England

[10] Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China

[11] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[12] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[13] Natl Univ Singapore, Mat Sci & Engn, Singapore 119077, Singapore

来源：

ADVANCED MATERIALS | 2022年 / 34卷 / 06期

基金：

中国国家自然科学基金;

关键词：

clean graphene; environmental scanning electron microscopy; intrinsic wettability; water contact angle; SUPPORTED GRAPHENE; RAMAN-SPECTROSCOPY; MOLECULAR-DYNAMICS; ENERGY;

D O I：

10.1002/adma.202103620

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 approximate to 30 degrees is observed, confirming the hydrophilic nature of pristine graphene. This high hydrophilicity originates from the charge transfer between graphene and water molecules through H-pi 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.

引用

页数：8

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