Wettability of graphene and interfacial water structure

Donghwan Kim; Eunchan Kim; Sohyun Park; Seungah Kim; Byoung Koun Min; Hyo Jae Yoon; Kyungwon Kwak; Minhaeng Cho

doi:10.1016/j.chempr.2021.03.006

Wettability of graphene and interfacial water structure

Donghwan Kim, Eunchan Kim, Sohyun Park, Seungah Kim, Byoung Koun Min, Hyo Jae Yoon, Kyungwon Kwak, Minhaeng Cho

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Understanding the wettability of graphene is important for various applications, such as water desalination, energy storage, and catalysis. However, the detailed water hydrogen-bonding structure at the water-graphene interface is not yet fully understood. Using vibrational sum-frequency-generation (VSFG) spectroscopy, we elucidate the water structure at a water-graphene interface. As the number of graphene layers increases, water molecules with dangling OH groups become more populated, indicating the transition from transparency to translucency. We compare the water contact angles on the graphene surfaces with VSFG results, showing an excellent correlation between the water adhesion energy of graphene and the fraction of dangling OH groups estimated from the VSFG spectrum. This observation suggests that the VSFG could be an incisive technique for measuring water's adhesion energy on any spatially confined interface where the water contact angle cannot be measured. We anticipate that the VSFG results will help to elucidate the wettability of low-dimensional materials.

Original language	English
Pages (from-to)	1602-1614
Number of pages	13
Journal	Chem
Volume	7
Issue number	6
DOIs	https://doi.org/10.1016/j.chempr.2021.03.006
Publication status	Published - 2021 Jun 10

Bibliographical note

Funding Information:
This work was supported by IBS-R023-D1 (M.C.) and a National Research Foundation of Korea grant funded by the Korean government ( NRF-2020R1A2C2010675 ) (K.K.). B.K.M. acknowledges financial support from the Korea Institute of Science and Technology Institutional Program.

Publisher Copyright:
© 2021 Elsevier Inc.

Keywords

SDG6: Clean water and sanitation
SDG7: Affordable and clean energy
SDG9: Industry, innovation, and infrastructure
VSFG
WCA
interfacial water structure
measurement of water contact angle
vibrational sum-frequency-generation spectroscopy
wettability of graphene

ASJC Scopus subject areas

Chemistry(all)
Biochemistry
Environmental Chemistry
Chemical Engineering(all)
Biochemistry, medical
Materials Chemistry

Access to Document

10.1016/j.chempr.2021.03.006

Cite this

@article{6b46434b25a44199afefdf819335d12d,

title = "Wettability of graphene and interfacial water structure",

abstract = "Understanding the wettability of graphene is important for various applications, such as water desalination, energy storage, and catalysis. However, the detailed water hydrogen-bonding structure at the water-graphene interface is not yet fully understood. Using vibrational sum-frequency-generation (VSFG) spectroscopy, we elucidate the water structure at a water-graphene interface. As the number of graphene layers increases, water molecules with dangling OH groups become more populated, indicating the transition from transparency to translucency. We compare the water contact angles on the graphene surfaces with VSFG results, showing an excellent correlation between the water adhesion energy of graphene and the fraction of dangling OH groups estimated from the VSFG spectrum. This observation suggests that the VSFG could be an incisive technique for measuring water's adhesion energy on any spatially confined interface where the water contact angle cannot be measured. We anticipate that the VSFG results will help to elucidate the wettability of low-dimensional materials.",

keywords = "SDG6: Clean water and sanitation, SDG7: Affordable and clean energy, SDG9: Industry, innovation, and infrastructure, VSFG, WCA, interfacial water structure, measurement of water contact angle, vibrational sum-frequency-generation spectroscopy, wettability of graphene",

author = "Donghwan Kim and Eunchan Kim and Sohyun Park and Seungah Kim and Min, {Byoung Koun} and Yoon, {Hyo Jae} and Kyungwon Kwak and Minhaeng Cho",

note = "Funding Information: This work was supported by IBS-R023-D1 (M.C.) and a National Research Foundation of Korea grant funded by the Korean government ( NRF-2020R1A2C2010675 ) (K.K.). B.K.M. acknowledges financial support from the Korea Institute of Science and Technology Institutional Program. Publisher Copyright: {\textcopyright} 2021 Elsevier Inc.",

year = "2021",

month = jun,

day = "10",

doi = "10.1016/j.chempr.2021.03.006",

language = "English",

volume = "7",

pages = "1602--1614",

journal = "Chem",

issn = "2451-9308",

publisher = "Elsevier Inc.",

number = "6",

}

TY - JOUR

T1 - Wettability of graphene and interfacial water structure

AU - Kim, Donghwan

AU - Kim, Eunchan

AU - Park, Sohyun

AU - Kim, Seungah

AU - Min, Byoung Koun

AU - Yoon, Hyo Jae

AU - Kwak, Kyungwon

AU - Cho, Minhaeng

N1 - Funding Information: This work was supported by IBS-R023-D1 (M.C.) and a National Research Foundation of Korea grant funded by the Korean government ( NRF-2020R1A2C2010675 ) (K.K.). B.K.M. acknowledges financial support from the Korea Institute of Science and Technology Institutional Program. Publisher Copyright: © 2021 Elsevier Inc.

PY - 2021/6/10

Y1 - 2021/6/10

N2 - Understanding the wettability of graphene is important for various applications, such as water desalination, energy storage, and catalysis. However, the detailed water hydrogen-bonding structure at the water-graphene interface is not yet fully understood. Using vibrational sum-frequency-generation (VSFG) spectroscopy, we elucidate the water structure at a water-graphene interface. As the number of graphene layers increases, water molecules with dangling OH groups become more populated, indicating the transition from transparency to translucency. We compare the water contact angles on the graphene surfaces with VSFG results, showing an excellent correlation between the water adhesion energy of graphene and the fraction of dangling OH groups estimated from the VSFG spectrum. This observation suggests that the VSFG could be an incisive technique for measuring water's adhesion energy on any spatially confined interface where the water contact angle cannot be measured. We anticipate that the VSFG results will help to elucidate the wettability of low-dimensional materials.

AB - Understanding the wettability of graphene is important for various applications, such as water desalination, energy storage, and catalysis. However, the detailed water hydrogen-bonding structure at the water-graphene interface is not yet fully understood. Using vibrational sum-frequency-generation (VSFG) spectroscopy, we elucidate the water structure at a water-graphene interface. As the number of graphene layers increases, water molecules with dangling OH groups become more populated, indicating the transition from transparency to translucency. We compare the water contact angles on the graphene surfaces with VSFG results, showing an excellent correlation between the water adhesion energy of graphene and the fraction of dangling OH groups estimated from the VSFG spectrum. This observation suggests that the VSFG could be an incisive technique for measuring water's adhesion energy on any spatially confined interface where the water contact angle cannot be measured. We anticipate that the VSFG results will help to elucidate the wettability of low-dimensional materials.

KW - SDG6: Clean water and sanitation

KW - SDG7: Affordable and clean energy

KW - SDG9: Industry, innovation, and infrastructure

KW - VSFG

KW - WCA

KW - interfacial water structure

KW - measurement of water contact angle

KW - vibrational sum-frequency-generation spectroscopy

KW - wettability of graphene

UR - http://www.scopus.com/inward/record.url?scp=85104930808&partnerID=8YFLogxK

U2 - 10.1016/j.chempr.2021.03.006

DO - 10.1016/j.chempr.2021.03.006

M3 - Article

AN - SCOPUS:85104930808

SN - 2451-9308

VL - 7

SP - 1602

EP - 1614

JO - Chem

JF - Chem

IS - 6

ER -

Wettability of graphene and interfacial water structure

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this