On the mechanism of hydrophilicity of graphene

Guo Hong; Yang Han; Thomas M. Schutzius; Yuming Wang; Ying Pan; Ming Hu; Jiansheng Jie; Chander S. Sharma; Ulrich Müller; Dimos Poulikakos

doi:10.1021/acs.nanolett.6b01594

On the mechanism of hydrophilicity of graphene

Guo Hong
, Yang Han
, Thomas M. Schutzius
, Yuming Wang
, Ying Pan
, Ming Hu
, Jiansheng Jie
, Chander S. Sharma
, Ulrich Müller
, Dimos Poulikakos^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

178 Citations (Scopus)

Abstract

It is generally accepted that the hydrophilic property of graphene can be affected by the underlying substrate. However, the role of intrinsic vs substrate contributions and the related mechanisms are vividly debated. Here, we show that the intrinsic hydrophilicity of graphene can be intimately connected to the position of its Fermi level, which affects the interaction between graphene and water molecules. The underlying substrate, or dopants, can tune hydrophilicity by modulating the Fermi level of graphene. By shifting the Fermi level of graphene away from its Dirac point, via either chemical or electrical voltage doping, we show enhanced hydrophilicity with experiments and first principle simulations. Increased vapor condensation on graphene, induced by a simple shifting of its Fermi level, exemplifies applications in the area of interfacial transport phenomena. © 2016 American Chemical Society.

Original language	English
Pages (from-to)	4447-4453
Journal	Nano Letters
Volume	16
Issue number	7
DOIs	https://doi.org/10.1021/acs.nanolett.6b01594
Publication status	Published - 13 Jul 2016
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

Financial support for this project is provided by ETH Zurich, Swiss National Science Foundation (200021_146898/1, 200021_146180/1, and 200021_144397/1), and European Research Council Advanced Grant (669908 INTICE). T.M.S. gratefully acknowledges the ETH Zurich Postdoctoral Fellowship Program and Marie Curie Actions for People COFUND program (FEL-14 13-1). We thank Ms. Asel Maria Aguilar Sanchez and Ms. Gabriele Peschke from the Institute for Building Materials, ETH Zurich for the support of the ESEM measurements.

Research Keywords

condensation
Fermi-level engineering
graphene
hydrophilicity

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title = "On the mechanism of hydrophilicity of graphene",

abstract = "It is generally accepted that the hydrophilic property of graphene can be affected by the underlying substrate. However, the role of intrinsic vs substrate contributions and the related mechanisms are vividly debated. Here, we show that the intrinsic hydrophilicity of graphene can be intimately connected to the position of its Fermi level, which affects the interaction between graphene and water molecules. The underlying substrate, or dopants, can tune hydrophilicity by modulating the Fermi level of graphene. By shifting the Fermi level of graphene away from its Dirac point, via either chemical or electrical voltage doping, we show enhanced hydrophilicity with experiments and first principle simulations. Increased vapor condensation on graphene, induced by a simple shifting of its Fermi level, exemplifies applications in the area of interfacial transport phenomena. {\textcopyright} 2016 American Chemical Society.",

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T1 - On the mechanism of hydrophilicity of graphene

AU - Hong, Guo

AU - Han, Yang

AU - Schutzius, Thomas M.

AU - Wang, Yuming

AU - Pan, Ying

AU - Hu, Ming

AU - Jie, Jiansheng

AU - Sharma, Chander S.

AU - Müller, Ulrich

AU - Poulikakos, Dimos

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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Y1 - 2016/7/13

N2 - It is generally accepted that the hydrophilic property of graphene can be affected by the underlying substrate. However, the role of intrinsic vs substrate contributions and the related mechanisms are vividly debated. Here, we show that the intrinsic hydrophilicity of graphene can be intimately connected to the position of its Fermi level, which affects the interaction between graphene and water molecules. The underlying substrate, or dopants, can tune hydrophilicity by modulating the Fermi level of graphene. By shifting the Fermi level of graphene away from its Dirac point, via either chemical or electrical voltage doping, we show enhanced hydrophilicity with experiments and first principle simulations. Increased vapor condensation on graphene, induced by a simple shifting of its Fermi level, exemplifies applications in the area of interfacial transport phenomena. © 2016 American Chemical Society.

AB - It is generally accepted that the hydrophilic property of graphene can be affected by the underlying substrate. However, the role of intrinsic vs substrate contributions and the related mechanisms are vividly debated. Here, we show that the intrinsic hydrophilicity of graphene can be intimately connected to the position of its Fermi level, which affects the interaction between graphene and water molecules. The underlying substrate, or dopants, can tune hydrophilicity by modulating the Fermi level of graphene. By shifting the Fermi level of graphene away from its Dirac point, via either chemical or electrical voltage doping, we show enhanced hydrophilicity with experiments and first principle simulations. Increased vapor condensation on graphene, induced by a simple shifting of its Fermi level, exemplifies applications in the area of interfacial transport phenomena. © 2016 American Chemical Society.

KW - condensation

KW - Fermi-level engineering

KW - graphene

KW - hydrophilicity

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U2 - 10.1021/acs.nanolett.6b01594

DO - 10.1021/acs.nanolett.6b01594

M3 - RGC 21 - Publication in refereed journal

SN - 1530-6984

VL - 16

SP - 4447

EP - 4453

JO - Nano Letters

JF - Nano Letters

IS - 7

ER -

On the mechanism of hydrophilicity of graphene

Abstract

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Research Keywords

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