The Effect of Illumination on Contact Angles of Pure Water on Crystalline Silicon

Vera‐Graziano, Ricardo; Mühl, S.; Rivera-Torres, Filiberto

doi:10.1006/jcis.1995.1139

Cited by 15 publications

(7 citation statements)

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“…This is consistent with theoretical predictions as well as with recent experiments 26 . Note, however, that much larger experimental values for τ have also been reported [16][17][18] . Resolving this issue is particularly important for surface nanobubbles 22,25,39,40 , typically 100nm wide, whose stability was suggested to rely on an effective line tension 41 .…”

Section: Discussionmentioning

confidence: 87%

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Origin of line tension for a Lennard-Jones nanodroplet

et al. 2011

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The existence and origin of line tension has remained controversial in literature. To address this issue we compute the shape of Lennard-Jones nanodrops using molecular dynamics and compare them to density functional theory in the approximation of the sharp kink interface. We show that the deviation from Young's law is very small and would correspond to a typical line tension length scale (defined as line tension divided by surface tension) similar to the molecular size and decreasing with Young's angle. We propose an alternative interpretation based on the geometry of the interface at the molecular scale

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Section: Discussionmentioning

confidence: 87%

“…A large amount of experimental work has been done to determine the magnitude of line tension. The most direct way is to measure the contact angle as a function of contact line curvature, and thus droplet size [14][15][16][17][18] . Using the modified Young-equation from (2) τ can then be calculated.…”

Section: Introductionmentioning

confidence: 99%

Origin of line tension for a Lennard-Jones nanodroplet

et al. 2011

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“…Line tension plays a fundamental role in, for example, the stability of liquid droplets adsorbed onto a solid substrate. However, it has been debated whether line tension plays a role in wetting because the magnitude of line tension is quite low [1][2][3][4][5][6][7] . Line tension should play role in heterogeneous nucleation on a substrate as well because three-phase contact exists in such a case 8 .…”

Section: Line Tensionmentioning

confidence: 99%

Line-tension-induced scenario of heterogeneous nucleation on a spherical substrate and in a spherical cavity

Iwamatsu

2015

The Journal of Chemical Physics

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Line-tension-induced scenario of heterogeneous nucleation is studied for a lens-shaped nucleus with a finite contact angle nucleated on a spherical substrate and on the bottom of the wall of a spherical cavity. The effect of line tension on the free energy of a critical nucleus can be separated from the usual volume term. By comparing the free energy of a lens-shaped critical nucleus of a finite contact angle with that of a spherical nucleus, we find that a spherical nucleus may have a lower free energy than a lens-shaped nucleus when the line tension is positive and large, which is similar to the drying transition predicted by Widom [B. Widom, J. Phys. Chem. 99 2803(1995]. Then, the homogeneous nucleation rather than the heterogeneous nucleation will be favorable. Similarly, the free energy of a lens-shaped nucleus becomes negative when the line tension is negative and large. Then, the barrier-less nucleation with no thermal activation called athermal nucleation will be realized.

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“…We give in Table 2 some typical experimental values also. [39] Deionized water/ −10 −9 ∼ 10 −8 [44] Air/water/silicon (+0.6 ∼ 2.3) × 10 −5 buffer solution/air [40] Silicon oil/glass +8.2 × 10 −7 [45] Silica surface/liquid tin −1.55 × 10 −4 /water /air…”

Section: Theoretical and Experimental Values Of Line Tensionsmentioning

confidence: 99%

Nonlinear effects of line tension in adhesion of small droplets

Yin

Zheng

2008

Appl. Math. Mech.-Engl. Ed.

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Three-phase line tensions may become crucial in the adhesion of micro-nano or small droplets on solid planes. In this paper we study for the first time the nonlinear effects in adhesion spanning the full range of physically possible parameters of surface tension, line tension, and droplet size. It is shown that the nonlinear adhesion solution spaces can be characterized into four regions. Within each region the adhesion behaves essentially the same. Especially, inside the characteristic regions with violent nonlinearities, the co-existence of multiple adhesion states for given materials is disclosed. Besides, two common fixed points in the solution space are revealed. These new results are consistent with numerical analysis and experimental observations reported in the literatures.

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The Effect of Illumination on Contact Angles of Pure Water on Crystalline Silicon

Cited by 15 publications

References 0 publications

Origin of line tension for a Lennard-Jones nanodroplet

Origin of line tension for a Lennard-Jones nanodroplet

Line-tension-induced scenario of heterogeneous nucleation on a spherical substrate and in a spherical cavity

Nonlinear effects of line tension in adhesion of small droplets

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