Evaporation of a nanodroplet on a rough substrate

doi:10.1007/s11467-016-0631-0

Front. Phys.

2017, Vol. 12

Issue (5) : 126401 https://doi.org/10.1007/s11467-016-0631-0

RESEARCH ARTICLE

Evaporation of a nanodroplet on a rough substrate

Yong-Juan Sun (孙永娟)^1,²,Tao Huang (黄韬)^1,²,Jun-Feng Zhao (赵俊锋)^1,³,Yong Chen (陈勇)^1,³(

)

¹. Center of Soft Matter Physics and its Applications, Beihang University, Beijing 100191, China
². Institute of Theoretical Physics, Lanzhou University, Lanzhou 730000, China
³. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China

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Abstract

The wettability and roughness of a substrate are crucial to the evolution of the contact angle and three-phase contact line in the evaporation of sessile droplets. In this paper, by performing molecular dynamics simulations for droplet evaporation at the nanoscale, we show that the wettability is more important than the roughness. For a smooth substrate, the evaporation behavior of a nanodroplet is similar to that at the macroscopic scale. This similarity is also observed in the case of a rough hydrophilic substrate. However, for a rough hydrophobic substrate, both the constant contact angle and contact line pinning appear in turn during evaporation. This suggests that the roughness of the hydrophobic substrate is useful for the evaporation technique in self-assembly at the nanoscale.

Keywords evaporation nanodroplet roughness wettability

Corresponding Author(s): Yong Chen (陈勇)

Issue Date: 25 November 2016

Cite this article:

Yong-Juan Sun (孙永娟),Tao Huang (黄韬),Jun-Feng Zhao (赵俊锋), et al. Evaporation of a nanodroplet on a rough substrate[J]. Front. Phys. , 2017, 12(5): 126401.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-016-0631-0
https://academic.hep.com.cn/fop/EN/Y2017/V12/I5/126401

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[1]	Zhao-Xia Niu, Tao Huang, Yong Chen. Molecular dynamics study of nanodroplet diffusion on smooth solid surfaces[J]. Front. Phys. , 2018, 13(5): 137804-.

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