Actuating Water Droplets on Graphene via Surface Wettability Gradients.
Langmuir
; 31(33): 9070-5, 2015 Aug 25.
Article
em En
| MEDLINE
| ID: mdl-26244449
ABSTRACT
A surface wettability gradient can break the equilibrium status of a liquid droplet and drives its unidirectional movement on the surface. We propose a conceptual design of the driving water droplet on a graphene surface and demonstrate that both speed and direction of the movement can be controlled via a continuous gradient of surface wettability using comprehensive molecular dynamics (MD) simulations. Controlling the water droplet toward linear and nonlinear arc paths is exemplified in one- and two-dimensional gradients of surface wettability, respectively. Unbalanced Young's equation is extended to understand the speed of the droplet movement, and the predications agree well with MD simulations.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Água
/
Simulação de Dinâmica Molecular
/
Grafite
Idioma:
En
Revista:
Langmuir
Assunto da revista:
QUIMICA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos