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Updated: Oct 12, 2025

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

Intrinsic Wettability in Pristine Graphene.

Jincan Zhang^1,2,3,4, Kaicheng Jia^1,2, Yongfeng Huang^5,6

¹Center 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.

Advanced Materials (Deerfield Beach, Fla.)

|November 22, 2021

Summary

This summary is machine-generated.

Graphene

Keywords:

clean graphene environmental scanning electron microscopy intrinsic wettability water contact angle

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Last Updated: Oct 12, 2025

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Area of Science:

Materials Science
Surface Science
Nanotechnology

Background:

Graphene's wettability is debated due to environmental sensitivity.
Surface contamination and substrates affect reported water contact angles (WCA).

Purpose of the Study:

To determine the intrinsic wettability of graphene.
To investigate the interaction between graphene and water molecules.

Main Methods:

Measured WCA on suspended, superclean graphene.
Utilized environmental scanning electron microscopy (ESEM).

Main Results:

Observed an extremely low average WCA of approximately 30°.
Confirmed the hydrophilic nature of pristine graphene.

Conclusions:

Graphene's hydrophilicity stems from charge transfer and H-π interactions with water.
This study offers insights into water-graphene interactions and 2D material surface characterization.