Resisting and pinning of a nanodrop by trenches on a hysteresis-free surface

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Title:	Resisting and pinning of a nanodrop by trenches on a hysteresis-free surface
Authors:	曹恆光;Chang, Cheng-Chung;Wu, Cyuan-Jhang;Sheng, Yu-Jane;Tsao, Heng-Kwong
Contributors:	工學院化學工程與材料工程學系
Keywords:	Brownian motion;Contact angle;Energy dissipation;Free surfaces;Hysteresis;Potential energy;Surface roughness;Surface roughness effects
Date:	2016-10-28
Issue Date:	2026-04-21 14:56:27 (UTC+8)
Publisher:	American Institute of Physics;United States: American Institute of Physics
Abstract:	摘要： The encounter of a nanodrop with a trench on a hysteresis-free surface is explored by many-body dissipative particle dynamics to show the effect of surface roughness on droplet wetting. A free nanodrop exhibits Brownian motion and the diffusivity decays exponentially with the liquid-solid contact area. In contrast, as the nanodrop sits on a trench, its random motion is constrained. Work must be done to overcome the energy barriers for the transition between free and trapped states. The potential energy landscape is thus constructed based on the force-displacement plot. It is shown that the trench acts as a hydrophobic blemish for capture but like a hydrophilic blemish for escape. A drop always breaks up after detachment from a hydrophilic trench. Therefore, the drop tends to bypass a small trench when it meets one. The macroscopic experiments are performed by fabricating liquid-infused surfaces with extremely low contact angle hysteresis. The experimental observations agree qualitatively with simulation outcomes. 其他題名： J Chem Phys 出版者： United States: American Institute of Physics 出版日期： 2016-10-28 出處： The Journal of chemical physics, 2016-10, Vol.145 (16), p.164702 資源來源： AIP Journals (American Institute of Physics) 版權： Author(s) 版權： 2016 Author(s). Published by AIP Publishing. 識別號： ISSN: 0021-9606 識別號： ISSN: 1089-7690 識別號： EISSN: 1089-7690 識別號： DOI: 10.1063/1.4965432 識別號： PMID: 27802631 識別號： CODEN: JCPSA6
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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