Topology-dominated dynamic wetting of the precursor chain in a hydrophilic interior corner

Yuan, Quanzi; Zhao, Ya‐Pu

doi:10.1098/rspa.2011.0305

Cited by 45 publications

(30 citation statements)

References 42 publications

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“…Once the PF came into contact with the pillars, it accelerated, especially at the interior corner between the pillar and the substrate, shown in figure 6(d). Because of the confinement, the potential surface at the interior corner is lower and smoother than that on the solid surface (Yuan & Zhao 2012). Hence a confined liquid molecule chain propagating ahead of the bulk droplet, i.e.…”

Section: Molecular Dynamics Simulationsmentioning

confidence: 99%

“…At the microscopic level, driven by the hydrodynamic pressure, the fringe advances on the base of the PF and fills the space among the pillars, as shown in figure 1(c). On one hand, the grooves between the pillars provide excess driving force to the PF and the fringe (Yuan & Zhao 2012); on the other hand, the pillars bring extra potential barriers to the PF and excess resistance to the fringe. How could these two opposite effects brought by the pillars achieve a balance in the fast advancing MCL?…”

Section: Introductionmentioning

confidence: 99%

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Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface

2013

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Dynamic wetting of a droplet on lyophilic pillars was explored using a multiscale combination method of experiments and molecular dynamics simulations. The excess lyophilic area not only provided excess driving force, but also pinned the liquid around the pillars, which kept the moving contact line in a dynamic balance state every period of the pillars. The flow pattern and the flow field of the droplet on the pillar-arrayed surface, influenced by the concerted effect of the liquid-solid interactions and the surface roughness, were revealed from the continuum to the atomic level. Then, the scaling analysis was carried out employing molecular kinetic theory. Controlled by the droplet size, the density of roughness and the pillar height, two extreme regimes were distinguished, i.e. R ∼ t 1/3 for the rough surface and R ∼ t 1/7 for the smooth surface. The scaling laws were validated by both the experiments and the simulations. Our results may help in understanding the dynamic wetting of a droplet on a pillar-arrayed lyophilic substrate and assisting the future design of pillar-arrayed lyophilic surfaces in practical applications.

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Section: Molecular Dynamics Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface

2013

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“…The radius of curvature of the liquid in the inset was about 2 μm in the order of w. Hence, the local Laplace pressure P c1 ∼ γ LV /w ∼ 10 3 Pa, which provided additional driving energy to pull the liquid to spread with a fast velocity along the corner between the pillars and the substrate. 32 The liquid near the pillars quickly accommodated to the square shape and was pinned by the pillars at 0.4 ms. Meanwhile, the rest part of the MCL still kept spreading in a line with a slow velocity.…”

Section: -mentioning

confidence: 99%

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

2014

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The dynamic spreading of a liquid droplet on micropillar-arrayed surfaces is experimentally investigated. A theoretical model is proposed to include energy dissipations raised from both the viscous resistance at mesoscale and the molecular friction at microscale in the triple-phase region. The scaling laws and spreading shape of the droplet change with the variation of the liquid viscosity because of the competition between these two mechanisms of energy dissipations at the moving contact line. The Laplace pressures at the interior corner and at the wavy contact line are the answers to the excess driving energy and the superwetting on pillar-arrayed surfaces. The formation and evolution of the bulk and the fringe are also analyzed in detail. Our results may help to understand the wetting dynamics on microtextured surfaces and assist the future design of engineered surfaces in practical applications. C 2014 AIP Publishing LLC. [http://dx

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“…It should be noted that the similar monatomic chains were reported only in a few experiments [16] or modeled in simulations [17,18]. However, in recent years, research on the electron transport properties of molecular devices has attracted increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Negative differential resistance behavior of silicon monatomic chain encapsulated in carbon nanotubes

Zhang¹,

Wang²,

Zhao³

2012

Computational Materials Science

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a b s t r a c tUsing nonequilibrium Green's functions in combination with density-functional theory (DFT), we investigated the electronic transport properties of the silicon monatomic chains (SiMCs) with different geometries which were induced by the encapsulation of the carbon nanotubes (CNTs). The encapsulated SiMCs, which were put inside (5,5), (6,6), (7,7) and (8,8) hydrogenated armchair CNTs, were coupled to two Au (1 0 0) nanoscale electrodes. The electronic transport property of an isolated finite SiMC was also studied to serve as a reference to our calculations. As the diameter of CNTs increases, the geometry structures of SiMCs changed. Calculated results show that the current-voltage (I-V) characteristics depend sensitively on the geometry structures of SiMCs and can be controlled by the size-selective encapsulation. Negative differential resistance (NDR) phenomena were observed within certain bias voltage ranges. A detailed analysis of the origin of NDR was carried out with the transmission spectrum, the spatial distribution of frontier molecular orbitals and the molecular projected self-consistent Hamiltonian (MPSH) states taken into consideration. These results indicated that the size-selective encapsulation of SiMCs in CNTs can become a possible candidate for designing the silicon-based nanoelectronic devices.

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Topology-dominated dynamic wetting of the precursor chain in a hydrophilic interior corner

Cited by 45 publications

References 42 publications

Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface

Multiscale dynamic wetting of a droplet on a lyophilic pillar-arrayed surface

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

Negative differential resistance behavior of silicon monatomic chain encapsulated in carbon nanotubes

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