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Moving Behavior of Nanodroplets on Wedge-Shaped Functional Surfaces
Wang S(王帅); Wang C(王超); Peng ZL(彭志龙); Chen SH(陈少华)
AbstractSurface functionalization has important application prospects in many aspects, for example, anti-drag, anti-pollution, anti-icing, self-cleaning, reversible adhesion, water collection, and so forth. Recently, a new technique of functional surface was proposed, in which a droplet can be activated to move from the narrow end of a wedge-shaped hydrophilic region imbedded in a hydrophobic surface to the wide end. Systematic molecular dynamics (MD) simulations and theoretical analysis are carried out in this paper in order to understand the motion mechanism, and more systematic designs for advanced functional surfaces are further proposed. It is found that the potential energy of the droplet decreases continuously as a function of distance when the droplet moves from the narrow end of the wedge-shaped track to the wide end and the corresponding potential energy achieves the minimum when the droplet completely enters the hydrophilic region. Effects of the wedge angle of hydrophilic area and the size of the droplet on the moving behavior are systematically investigated. It is interesting to find that both factors would show significant influence on the moving behavior of droplets, which is well consistent with the experimental observations. Theoretical analysis is further carried out, where driving force of droplet transport is well achieved. All the MD simulation results and experimental observations can be well explained by the nonlinearly changed driving force. Finally, several new designs of functional surfaces for controlling droplet transport, including droplet turning, pinning, accelerating, gathering, and moving path selection, are suggested, the feasibilities of which are further verified and discussed. The results in this paper would be helpful for the design of advanced functional surfaces to manipulate droplets in real applications.
Indexed BySCI ; EI
WOS IDWOS:000457067500031
WOS Research AreaChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS SubjectChemistry ; Science & Technology - Other Topics ; Materials Science
Funding OrganizationNSFC [11532013, 11872114, 11602270]
ContributorChen, SH ; Wang, C
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.{Wang, Shuai、Peng, Zhilong、Chen, Shaohua} Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China
2.{Wang, Shuai、Peng, Zhilong、Chen, Shaohua} Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Beijing 100081, Peoples R China
3.{Wang, Chao} Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang S,Wang C,Peng ZL,et al. Moving Behavior of Nanodroplets on Wedge-Shaped Functional Surfaces[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2019,123(3):1798-1805.
APA 王帅,王超,彭志龙,&陈少华.(2019).Moving Behavior of Nanodroplets on Wedge-Shaped Functional Surfaces.JOURNAL OF PHYSICAL CHEMISTRY C,123(3),1798-1805.
MLA 王帅,et al."Moving Behavior of Nanodroplets on Wedge-Shaped Functional Surfaces".JOURNAL OF PHYSICAL CHEMISTRY C 123.3(2019):1798-1805.
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