Dynamic spreading on pillar-arrayed surfaces: Viscous resistance versus molecular friction

Yuan, Quanzi; Huang, Xianfu; Zhao, Ya-Pu

doi:10.1063/1.4895497

Cited by 66 publications

(42 citation statements)

References 40 publications

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“…Previously, Yuan et al 3233. have developed a combined theoretical framework of hydrodynamics and molecular kinetic theory to investigate the substrate morphology effect on the spreading of a droplet on a lyophilic pillar-arrayed surface.…”

Section: Resultsmentioning

confidence: 99%

Channel morphology effect on water transport through graphene bilayers

Liu

Law

et al. 2016

Sci Rep

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The application of few-layered graphene-derived functional thin films for molecular filtration and separation has recently attracted intensive interests. In practice, the morphology of the nanochannel formed by the graphene (GE) layers is not ideally flat and can be affected by various factors. This work investigates the effect of channel morphology on the water transport behaviors through the GE bilayers via molecular dynamics simulations. The simulation results show that the water flow velocity and transport resistance highly depend on the curvature of the graphene layers, particularly when they are curved in non-synergic patterns. To understand the channel morphology effect, the distributions of water density, dipole moment orientation and hydrogen bonds inside the channel are investigated, and the potential energy surface with different distances to the basal GE layer is analyzed. It shows that the channel morphology significantly changes the distribution of the water molecules and their orientation and interaction inside the channel. The energy barrier for water molecules transport through the channel also significantly depends on the channel morphology.

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Section: Resultsmentioning

confidence: 99%

Channel morphology effect on water transport through graphene bilayers

Liu

Law

et al. 2016

Sci Rep

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“…Wetting and spreading of liquid droplets on solid surfaces were extensively investigated in the past century (8)(9)(10)(11)(12)(13) because of their ubiquitous existence in nature and applications. Recently, much research has focused on morphology control of droplets using micro-decorated surfaces (14)(15)(16)(17)(18)(19)(20)(21).…”

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confidence: 99%

Topography-induced symmetry transition of droplets on quasi-periodically patterned surfaces

2018

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Quasi-periodic structures of quasicrystals yield novel effects in diverse systems. However, there is little investigation on employing quasi-periodic structures in morphology control. Here, we show the use of quasi-periodic surface structures in controlling the transition of liquid droplets. Although surface structures seem random-like, we find that on these surfaces, droplets spread to well-defined 5-fold symmetric shapes and the symmetry of droplet shapes spontaneously restores during spreading, hitherto unreported in the morphology control of droplets. To obtain physical insights into these symmetry transitions, we conduct energy analysis and perform systematic experiments by varying the properties of both liquid droplets and patterned surfaces. The results show the dominant factors in determining droplet shapes to be surface topography and the self-similarity of the surface structure. Quantified results of the droplet spreading process show distinct dynamics from the spreading experiments on periodically micropatterned surfaces. Our findings significantly advance the control capability of the droplet morphology. Such a quasi-periodic patterning strategy can offer a new method to achieve complex patterns, and may be used to model patterns in the study of rough surfaces.

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“…Many technologies have been developed for the fabrication of superhydrophobic surfaces. Two types of strategies have been employed to produce superhydrophobic surfaces: (1) forming a rough surface from a low-surface-energy material1234567891011 and (2) modifying a surface using a low-surface-energy material12131415161718192021.…”

mentioning

confidence: 99%

Laser Printing of Superhydrophobic Patterns from Mixtures of Hydrophobic Silica Nanoparticles and Toner Powder

Ngo

Chun

2016

Sci Rep

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In this work, a new and facile dry printing method was developed for the direct fabrication of superhydrophobic patterns based on silica nanoparticles. Mixtures of hydrophobic fumed silica nanoparticles and toner powder were printed on paper and polymer sheets using a commercial laser printer to produce the superhydrophobic patterns. The mixing ratio of the toner powder (for the laser printer) to hydrophobic silica was also investigated to optimize both the printing quality and the superhydrophobicity of the printed areas. The proper mixing ratio was then used to print various superhydrophobic patterns, including triangular, square, circular, and complex arrangements, to demonstrate that superhydrophobic surfaces with different patterns can be fabricated in a few seconds without any post-processing. The superhydrophobicity of each sample was evaluated by contact angle measurements, and all printed areas showed contact angles greater than 150°. The research described here opens the possibility of rapid production of superhydrophobic surfaces with various patterns. Ultimately, the obtained findings may have a significant impact on applications related to self-cleaning, control of water geometry and position, fluid mixing and fluid transport.

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Dynamic spreading on pillar-arrayed surfaces: Viscous resistance versus molecular friction

Cited by 66 publications

References 40 publications

Channel morphology effect on water transport through graphene bilayers

Channel morphology effect on water transport through graphene bilayers

Topography-induced symmetry transition of droplets on quasi-periodically patterned surfaces

Laser Printing of Superhydrophobic Patterns from Mixtures of Hydrophobic Silica Nanoparticles and Toner Powder

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