Thermodynamics of contact angles. II. Rough solid surfaces

Eick, J. David; Good, Robert J.; Neumann, A. W.

doi:10.1016/0021-9797(75)90010-7

Cited by 263 publications

(146 citation statements)

References 9 publications

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“…32 Typically, the contact angle varies along the three-phase contact line for a liquid drop resting on a rough and/or heterogeneous solid surface. Local changes in angles of inclination of the rough surface 33 and/or variation in chemistry of a heterogeneous surface 34 cause the three-phase contact line to contort. Since the contact angles are typically measured macroscopically for liquid drops with a diameter of a few millimeters using low-magnification optical lenses, the local angles are ignored.…”

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confidence: 99%

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Physics and applications of superhydrophobic and superhydrophilic surfaces and coatings

Drelich

Marmur

2014

Surface Innovations

153

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The terms superhydrophobicity and superhydrophilicity were introduced not very long ago, in 1996 and 2000, respectively.The former is used to describe exceptionally weak and the latter used to indicate strong interactions of materials and IntroductionAfter more than two centuries of research, capillarity and wetting phenomena still remain popular topics of investigation in many modern surface chemistry laboratories. Curiosity and fascination with rain droplets splashing in a puddle, water droplets decorating flowers, leaves of plants and fruits after rain or watering and colorful soap bubbles shaped at the end of wheat straw have never been stronger and go beyond scientific laboratories. Colorful images of liquid droplets and puddles, illustrating their behavior on a variety of surfaces, thrive in professional journals, popular magazines and Internet. However, terms such as wetting, spreading and contact angle are still puzzling to the layman and beginner researcher. To facilitate

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confidence: 99%

“…33,34 The phenomenon of multiple liquid-solid metastable configurations can be analyzed in terms of the Gibbs energy that takes into account the details of surface geometry, topography and local wettability. Figure 5 shows an imaginary correlation between the Gibbs energy and apparent contact angle for a liquid on a rough or heterogeneous solid surface.…”

mentioning

confidence: 99%

Physics and applications of superhydrophobic and superhydrophilic surfaces and coatings

Drelich

Marmur

2014

Surface Innovations

153

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“…However, as calculated in Ref. [30], the relation between free energy and the apparent contact angle for a liquid droplet on a rough surface showed that metastable states existed and were separated by free energy barriers. In other words, different contact angles can be found on rough surfaces.…”

Section: Mechanism Of Ultrahydrophobicitymentioning

confidence: 81%

“…the difference between the advancing and receding contact angles, should be considered as well [1]. This is because a water droplet on a rough surface often resides in a metastable state and exhibits a metastable contact angle [28,30]. In this situation, the static contact angle or the advancing contact angle alone is not enough to reflect the wettability of a solid surface.…”

Section: Contact Angles Hysteresismentioning

confidence: 99%

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Preparation and characterization of an ultrahydrophobic surface based on a stearic acid self-assembled monolayer over polyethyleneimine thin films

et al. 2003

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A novel ultrahydrophobic ultrathin film was prepared by stearic acid (STA) chemically adsorbed onto the polyethyleneimine (PEI) coated aluminum wafer. The formation and the structure of the films have been characterized by means of water contact angle measurement, ellipsometry, Fourier transformation infrared spectroscopy, and X-ray photoelectron spectroscopy. The static contact angle for water on the surface of this ultrathin organic film was measured to be as high as 166°. Apart from the hydrophobic STA monolayer, the needle-like surface nanostructures with enough roughness was found to be essential for the generation of ultrahydrophobicity. We suggest that a composite interface formed by the needle-like surface nanostructures, water droplet, and air trapped in the crevices is responsible for the superior water-repellent property.

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New etching method of PVC plastic for plating by ultrasound

Zhao

Bao

Feng

et al. 1998

J. Appl. Polym. Sci.

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An ultrasonic etching method is effective to pretreatment of PVC plastic for plating without chemical pollution. After being etched for 60 min by 28-kHz ultrasound, the improvement of adhesion strength of Cu-PVC can increase 13%, compared with that of chromic-sulphuric acid etching. The mechanism of adhesion improvement was studied by examination of weight loss, surface roughness, scanning electron microscopy, image analysis, and X-ray photoelectron spectroscopy.

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Thermodynamics of contact angles. II. Rough solid surfaces

Cited by 263 publications

References 9 publications

Physics and applications of superhydrophobic and superhydrophilic surfaces and coatings

Physics and applications of superhydrophobic and superhydrophilic surfaces and coatings

Preparation and characterization of an ultrahydrophobic surface based on a stearic acid self-assembled monolayer over polyethyleneimine thin films

New etching method of PVC plastic for plating by ultrasound

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