Thermophoretically driven water droplets on graphene and boron nitride surfaces

Rajegowda, R, Kannam, S, Hartkamp, R and Sathian, S 2018, 'Thermophoretically driven water droplets on graphene and boron nitride surfaces', Nanotechnology, vol. 29, no. 21, pp. 1-11.


Document type: Journal Article
Collection: Journal Articles

Title Thermophoretically driven water droplets on graphene and boron nitride surfaces
Author(s) Rajegowda, R
Kannam, S
Hartkamp, R
Sathian, S
Year 2018
Journal name Nanotechnology
Volume number 29
Issue number 21
Start page 1
End page 11
Total pages 11
Publisher Institute of Physics
Abstract We investigate thermally driven water droplet transport on graphene and hexagonal boron nitride (h-BN) surfaces using molecular dynamics simulations. The two surfaces considered here have different wettabilities with a significant difference in the mode of droplet transport. The water droplet travels along a straighter path on the h-BN sheet than on graphene. The h-BN surface produced a higher driving force on the droplet than the graphene surface. The water droplet is found to move faster on h-BN surface compared to graphene surface. The instantaneous contact angle was monitored as a measure of droplet deformation during thermal transport. The characteristics of the droplet motion on both surfaces is determined through the moment scaling spectrum. The water droplet on h-BN surface showed the attributes of the super-diffusive process, whereas it was sub-diffusive on the graphene surface.
Subject Condensed Matter Modelling and Density Functional Theory
Chemical Thermodynamics and Energetics
Keyword(s) boron nitride
graphene
nanotransport
thermophoresis
water
DOI - identifier 10.1088/1361-6528/aab3a3
Copyright notice © 2018 IOP Publishing Ltd.
ISSN 0957-4484
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