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Title: Wettability of partially suspended graphene

Dependence on the wettability of graphene on the nature of the underlying substrate remains only partially understood. We systematically investigate the role of liquid-substrate interactions on the wettability of graphene by varying the area fraction of suspended graphene from 0 to 95% by means of nanotextured substrates. We find that completely suspended graphene exhibits the highest water contact angle (85° ± 5°) compared to partially suspended or supported graphene, regardless of the hydrophobicity (hydrophilicity) of the substrate. Moreover, 80% of the long-range water-substrate interactions are screened by the graphene monolayer, the wettability of which is primarily determined by short-range graphene-liquid interactions. By its well-defined chemical and geometrical properties, supported graphene therefore provides a model system to elucidate the relative contribution of short and long range interactions to the macroscopic contact angle.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2]
  1. CEMES-CNRS, Toulouse (France)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-112027-2016-JA
Journal ID: ISSN 2045-2322; R&D Project: PO034; KC0203010
Grant/Contract Number:
SC00112704
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1254807

Ondarçuhu, Thierry, Thomas, Vincent, Nuñez, Marc, Dujardin, Erik, Rahman, Atikur, Black, Charles T., and Checco, Antonio. Wettability of partially suspended graphene. United States: N. p., Web. doi:10.1038/srep24237.
Ondarçuhu, Thierry, Thomas, Vincent, Nuñez, Marc, Dujardin, Erik, Rahman, Atikur, Black, Charles T., & Checco, Antonio. Wettability of partially suspended graphene. United States. doi:10.1038/srep24237.
Ondarçuhu, Thierry, Thomas, Vincent, Nuñez, Marc, Dujardin, Erik, Rahman, Atikur, Black, Charles T., and Checco, Antonio. 2016. "Wettability of partially suspended graphene". United States. doi:10.1038/srep24237. https://www.osti.gov/servlets/purl/1254807.
@article{osti_1254807,
title = {Wettability of partially suspended graphene},
author = {Ondarçuhu, Thierry and Thomas, Vincent and Nuñez, Marc and Dujardin, Erik and Rahman, Atikur and Black, Charles T. and Checco, Antonio},
abstractNote = {Dependence on the wettability of graphene on the nature of the underlying substrate remains only partially understood. We systematically investigate the role of liquid-substrate interactions on the wettability of graphene by varying the area fraction of suspended graphene from 0 to 95% by means of nanotextured substrates. We find that completely suspended graphene exhibits the highest water contact angle (85° ± 5°) compared to partially suspended or supported graphene, regardless of the hydrophobicity (hydrophilicity) of the substrate. Moreover, 80% of the long-range water-substrate interactions are screened by the graphene monolayer, the wettability of which is primarily determined by short-range graphene-liquid interactions. By its well-defined chemical and geometrical properties, supported graphene therefore provides a model system to elucidate the relative contribution of short and long range interactions to the macroscopic contact angle.},
doi = {10.1038/srep24237},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {2016},
month = {4}
}