Wetting of Water on Graphene

Handle URI:
http://hdl.handle.net/10754/626566
Title:
Wetting of Water on Graphene
Authors:
Bera, Bijoyendra; Shahidzadeh, Noushine; Mishra, Himanshu ( 0000-0001-8759-7812 ) ; Bonn, Daniel
Abstract:
The wetting properties of graphene have proven controversial and difficult to assess. The presence of a graphene layer on top of a substrate does not significantly change the wetting properties of the solid substrate, suggesting that a single graphene layer does not affect the adhesion between the wetting phase and the substrate. However, wetting experiments of water on graphene show contact angles that imply a large amount of adhesion. Here, we investigate the wetting of graphene by measuring the mass of water vapor adsorbing to graphene flakes of different thickness at different relative humidities. Our experiments unambiguously show that the thinnest of graphene flakes do not adsorb water, from which it follows that the contact angle of water on these flakes is ~180o. Thicker flakes of graphene nanopowder, on the other hand, do adsorb water. A calculation of the van der Waals (vdW) interactions that dominate the adsorption in this system confirms that the adhesive interactions between a single atomic layer of graphene and water are so weak that graphene is superhydrophobic. The observations are confirmed in an independent experiment on graphene-coated water droplets that shows that it is impossible to make liquid 'marbles' with molecularly thin graphene.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program
Publisher:
arXiv
Issue Date:
28-Nov-2016
ARXIV:
arXiv:1611.09093
Type:
Preprint
Additional Links:
http://arxiv.org/abs/1611.09093v3; http://arxiv.org/pdf/1611.09093v3
Appears in Collections:
Other/General Submission; Environmental Science and Engineering Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorBera, Bijoyendraen
dc.contributor.authorShahidzadeh, Noushineen
dc.contributor.authorMishra, Himanshuen
dc.contributor.authorBonn, Danielen
dc.date.accessioned2017-12-28T07:32:16Z-
dc.date.available2017-12-28T07:32:16Z-
dc.date.issued2016-11-28en
dc.identifier.urihttp://hdl.handle.net/10754/626566-
dc.description.abstractThe wetting properties of graphene have proven controversial and difficult to assess. The presence of a graphene layer on top of a substrate does not significantly change the wetting properties of the solid substrate, suggesting that a single graphene layer does not affect the adhesion between the wetting phase and the substrate. However, wetting experiments of water on graphene show contact angles that imply a large amount of adhesion. Here, we investigate the wetting of graphene by measuring the mass of water vapor adsorbing to graphene flakes of different thickness at different relative humidities. Our experiments unambiguously show that the thinnest of graphene flakes do not adsorb water, from which it follows that the contact angle of water on these flakes is ~180o. Thicker flakes of graphene nanopowder, on the other hand, do adsorb water. A calculation of the van der Waals (vdW) interactions that dominate the adsorption in this system confirms that the adhesive interactions between a single atomic layer of graphene and water are so weak that graphene is superhydrophobic. The observations are confirmed in an independent experiment on graphene-coated water droplets that shows that it is impossible to make liquid 'marbles' with molecularly thin graphene.en
dc.publisherarXiven
dc.relation.urlhttp://arxiv.org/abs/1611.09093v3en
dc.relation.urlhttp://arxiv.org/pdf/1611.09093v3en
dc.rightsArchived with thanks to arXiven
dc.titleWetting of Water on Grapheneen
dc.typePreprinten
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.eprint.versionPre-printen
dc.contributor.institutionSoft Matter Group, Institute of Physics, Science Park 904, 1098XH Amsterdam, The Netherlandsen
dc.contributor.institutionWater Desalination and Reuse Center (WDRC)en
dc.identifier.arxividarXiv:1611.09093en
kaust.authorMishra, Himanshuen
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