Thermophoretically driven water droplets on graphene and boron nitride surfaces

Thermophoretically driven water droplets on graphene and boron nitride surfaces

Rajegowda, Rakesh (Indian Institute of Technology Madras)
Kannam, Sridhar Kumar (Swinburne University of Technology; Royal Melbourne Institute of Technology University)
Hartkamp, Remco (TU Delft Process and Energy)
Sathian, Sarith P. (Indian Institute of Technology Madras)

Process and Energy

2018

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.

boron nitride
graphene
nanotransport
thermophoresis
water

http://resolver.tudelft.nl/uuid:f29f6d3c-88d9-4dd3-9ed4-9075411733d7

https://doi.org/10.1088/1361-6528/aab3a3

2018-09-27

0957-4484

Nanotechnology, 29 (21)

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2018 Rakesh Rajegowda, Sridhar Kumar Kannam, Remco Hartkamp, Sarith P. Sathian