Water tribology on graphene

Hartmann E. N'Guessan; Aisha Leh; Paris Cox; Prashant Bahadur; Rafael Tadmor; Prabir Patra; Robert Vajtai; Pulickel M. Ajayan; Priyanka Wasnik

doi:10.1038/ncomms2247

Water tribology on graphene

Hartmann E. N'Guessan, Aisha Leh, Paris Cox, Prashant Bahadur, Rafael Tadmor, Prabir Patra, Robert Vajtai, Pulickel M. Ajayan, Priyanka Wasnik

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

Abstract

Classical experiments show that the force required to slide liquid drops on surfaces increases with the resting time of the drop, t_rest, and reaches a plateau typically after several minutes. Here we use the centrifugal adhesion balance to show that the lateral force required to slide a water drop on a graphene surface is practically invariant with t_rest. In addition, the drop's three-phase contact line adopts a peculiar micrometric serrated form. These observations agree well with current theories that relate the time effect to deformation and molecular re-orientation of the substrate surface. Such molecular re-orientation is non-existent on graphene, which is chemically homogenous. Hence, graphene appears to provide a unique tribological surface test bed for a variety of liquid drop-surface interactions.

Original language	American English
Article number	1242
Journal	Nature Communications
Volume	3
DOIs	https://doi.org/10.1038/ncomms2247
State	Published - 1 Dec 2012
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

Access to Document

10.1038/ncomms2247

Cite this

@article{e4fdfaa1c018465cb2309f3afecad07f,

title = "Water tribology on graphene",

abstract = "Classical experiments show that the force required to slide liquid drops on surfaces increases with the resting time of the drop, trest, and reaches a plateau typically after several minutes. Here we use the centrifugal adhesion balance to show that the lateral force required to slide a water drop on a graphene surface is practically invariant with trest. In addition, the drop's three-phase contact line adopts a peculiar micrometric serrated form. These observations agree well with current theories that relate the time effect to deformation and molecular re-orientation of the substrate surface. Such molecular re-orientation is non-existent on graphene, which is chemically homogenous. Hence, graphene appears to provide a unique tribological surface test bed for a variety of liquid drop-surface interactions.",

author = "N'Guessan, {Hartmann E.} and Aisha Leh and Paris Cox and Prashant Bahadur and Rafael Tadmor and Prabir Patra and Robert Vajtai and Ajayan, {Pulickel M.} and Priyanka Wasnik",

year = "2012",

month = dec,

day = "1",

doi = "10.1038/ncomms2247",

language = "American English",

volume = "3",

journal = "Nature Communications",

issn = "2041-1723",

publisher = "Nature Research",

}

TY - JOUR

T1 - Water tribology on graphene

AU - N'Guessan, Hartmann E.

AU - Leh, Aisha

AU - Cox, Paris

AU - Bahadur, Prashant

AU - Tadmor, Rafael

AU - Patra, Prabir

AU - Vajtai, Robert

AU - Ajayan, Pulickel M.

AU - Wasnik, Priyanka

PY - 2012/12/1

Y1 - 2012/12/1

N2 - Classical experiments show that the force required to slide liquid drops on surfaces increases with the resting time of the drop, trest, and reaches a plateau typically after several minutes. Here we use the centrifugal adhesion balance to show that the lateral force required to slide a water drop on a graphene surface is practically invariant with trest. In addition, the drop's three-phase contact line adopts a peculiar micrometric serrated form. These observations agree well with current theories that relate the time effect to deformation and molecular re-orientation of the substrate surface. Such molecular re-orientation is non-existent on graphene, which is chemically homogenous. Hence, graphene appears to provide a unique tribological surface test bed for a variety of liquid drop-surface interactions.

AB - Classical experiments show that the force required to slide liquid drops on surfaces increases with the resting time of the drop, trest, and reaches a plateau typically after several minutes. Here we use the centrifugal adhesion balance to show that the lateral force required to slide a water drop on a graphene surface is practically invariant with trest. In addition, the drop's three-phase contact line adopts a peculiar micrometric serrated form. These observations agree well with current theories that relate the time effect to deformation and molecular re-orientation of the substrate surface. Such molecular re-orientation is non-existent on graphene, which is chemically homogenous. Hence, graphene appears to provide a unique tribological surface test bed for a variety of liquid drop-surface interactions.

UR - http://www.scopus.com/inward/record.url?scp=84871819596&partnerID=8YFLogxK

U2 - 10.1038/ncomms2247

DO - 10.1038/ncomms2247

M3 - Article

C2 - 23212371

SN - 2041-1723

VL - 3

JO - Nature Communications

JF - Nature Communications

M1 - 1242

ER -

Water tribology on graphene

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this