Phase Diagram of Nanoscale Water on Solid Surfaces with Various Wettabilities

Hu Qiu; Wanlin Guo

doi:10.1021/acs.jpclett.9b02512

Phase diagram for nanodroplet impact on solid surfaces

Physics of Fluids ◽

10.1063/5.0067780 ◽

2021 ◽

Vol 33 (10) ◽

pp. 102007

Author(s):

Qiang Ma ◽

Yi-Feng Wang ◽

Yi-Bo Wang ◽

Xin He ◽

Shao-Fei Zheng ◽

...

Keyword(s):

Phase Diagram ◽

Solid Surfaces

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A field theory of random heteropolymers near solid surfaces: Analysis of interfacial organization and adsorption–desorption phase diagram

The Journal of Chemical Physics ◽

10.1063/1.469860 ◽

1995 ◽

Vol 103 (24) ◽

pp. 10733-10750 ◽

Cited By ~ 36

Author(s):

Lorin Gutman ◽

Arup K. Chakraborty

Keyword(s):

Field Theory ◽

Phase Diagram ◽

Solid Surfaces ◽

Adsorption Desorption

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Ruga mechanics of creasing: from instantaneous to setback creases

Proceedings of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rspa.2012.0753 ◽

2013 ◽

Vol 469 (2157) ◽

pp. 20120753 ◽

Cited By ~ 35

Author(s):

Mazen Diab ◽

Teng Zhang ◽

Ruike Zhao ◽

Huajian Gao ◽

Kyung-Suk Kim

Keyword(s):

Phase Diagram ◽

Compressive Strain ◽

Elastic Stiffness ◽

Solid Surfaces ◽

Decay Length ◽

Stretchable Electronics ◽

Bifurcation Stability ◽

Strain Limit ◽

Admissible Perturbation ◽

Perturbation Wavelength

We present mechanics of surface creasing caused by lateral compression of a nonlinear neo-Hookean solid surface, with its elastic stiffness decaying exponentially with depth. Nonlinear bifurcation stability analysis reveals that neo-Hookean solid surfaces can develop instantaneous surface creasing under compressive strains greater than 0.272 but less than 0.456. It is found that instantaneous creasing is set off when the compressive strain is large enough, and the longest-admissible perturbation wavelength relative to the decay length of the elastic modulus is shorter than a critical value. A compressive strain smaller than 0.272 can only trigger bifurcation of a stable wrinkle that can prompt a setback crease upon further compression. The minimum compressive strain required to develop setback creasing is found to be 0.174. If the relative longest-admissible perturbation wavelength is long enough, then the wrinkle can fold before it creases, and the specimen can be compressed further beyond the Biot critical strain limit of 0.456. Various bifurcation branches on a plane of normalized longest-admissible wavelength versus compressive strain delineate different phases of corrugated surface configurations to form a ruga phase diagram. The phase diagram will be useful for understating surface crease, as well as for controlling ruga structures for various applications, such as designing stretchable electronics.

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Motion of Newtonian drops deposited on liquid-impregnated surfaces induced by vertical vibrations

Journal of Fluid Mechanics ◽

10.1017/jfm.2019.600 ◽

2019 ◽

Vol 876 ◽

Cited By ~ 8

Author(s):

Paolo Sartori ◽

Elia Guglielmin ◽

Davide Ferraro ◽

Daniele Filippi ◽

Annamaria Zaltron ◽

...

Keyword(s):

Phase Diagram ◽

Contact Angle ◽

Fast Rate ◽

Contact Angle Hysteresis ◽

Solid Surfaces ◽

Distilled Water ◽

Liquid Drops ◽

Dynamical Phase ◽

Viscous Drops ◽

Vertical Vibrations

We have studied the motion of drops on inclined liquid-impregnated surfaces (LISs) subject to vertical vibrations. The liquid drops comprise distilled water and different aqueous solutions of glycerol of increasing viscosity. The use of weak pinning LISs strongly affects the dynamical phase diagram. First of all, there is no trace of the dominant static region at low oscillating amplitudes reported for oscillating solid surfaces characterized by contact angle hysteresis. On the contrary, at sufficiently low oscillating amplitudes, the drops always move downwards with a velocity that depends only on the drop viscosity. Further increasing the oscillating amplitude may drive the drop upwards against gravity, as reported for dry surfaces. The use of more viscous drops widens this climbing region. Arguably, the main novelty of this work concerns the observation of two distinct descending regimes where the downhill speed differs by a factor of five or more. Fast-rate videos show that the evolution of the drop profile is diverse in the two regimes, likely because the vertical oscillations reduce the effect of the oil meniscus surrounding the drop at high accelerations.

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