Wetting

Wetting is the ability of a liquid to maintain contact with a solid surface, resulting from intermolecular interactions when the two are brought together. The degree of wetting (wettability) is determined by a force balance between adhesive and cohesive forces. Wetting deals with the three phases of materials: gas, liquid, and solid. It is now a center of attention in nanotechnology and nanoscience studies due to the advent of many nanomaterials in the past two decades (e.g. graphene,carbon nanotube).

Wetting is important in the bonding or adherence of two materials. Wetting and the surface forces that control wetting are also responsible for other related effects, including so-called capillary effects.

There are two types of wetting: non-reactive wetting and active wetting.

Explanation

Adhesive forces between a liquid and solid cause a liquid drop to spread across the surface. Cohesive forces within the liquid cause the drop to ball up and avoid contact with the surface.

The contact angle (θ), as seen in Figure 1, is the angle at which the liquid–vapor interface meets the solid–liquid interface. The contact angle is determined by the result between adhesive and cohesive forces. As the tendency of a drop to spread out over a flat, solid surface increases, the contact angle decreases. Thus, the contact angle provides an inverse measure of wettability.

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Latest News for: wetting

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Wet weather rugby shakes up the Super Rugby standings and sees the Blues slip

Ellensburg Daily Record 20 Apr 2025
WELLINGTON, New Zealand (AP) — The first really wet weekend in Super Rugby saw a reduction in scorelines and a rearrangement of the standings which leaves the defending champion Blues in playoff jeopardy ....
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Teenagers are unhappy, also water is wet

The Advocate & Democrat 20 Apr 2025
Some people, they say, are forever haunted by their teenage years while others forget them as soon as they’re over. The large majority of us, I’m sure, fall somewhere in the middle, not really scarred by them while remembering some ....
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Rains lash Kashmir; MeT predicts two-day wet spell

Hindustan Times 19 Apr 2025
Many parts of Kashmir on Friday witnessed fresh rainfall as the MeT has predicted heavy to moderate rainfall till Sunday evening ... (AP File) ... News / Cities / Chandigarh / Rains lash Kashmir; MeT predicts two-day wet spell. See Less ....
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Early summer forecast says Indiana will be slightly hotter and wet in 2025

IndyStar 19 Apr 2025
Pets in hot weather. How to protect dogs, cats in summer. Here are some tips on going outside and traveling with pets in hot weather as summer begins to heat up. Good news for anyone looking for a reason to take a dip in the pool this summer.
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Met Office says Easter weekend will turn 'brighter' despite wet start but one area in ...

Daily Record 18 Apr 2025
The Easter bank holiday has started with rain and wind but the weather agency predicts brighter days ahead ... .
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George Numatic GVE370 Wet and Dry Vacuum review: A high-performance hoover for pro cleans

London Evening Standard 18 Apr 2025
I put the George Numatic GVE370 to the test and found it to be a top contender, excelling in both wet and dry cleaning tasks ... .
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Wet hair and vintage vibes — Byeon Woo-seok crowned the ultimate ‘boyfriend pic’ king

Korea Times 18 Apr 2025
In other shots, Byeon combines wet hair with a black shirt and leather pants, giving off an intense and stylish aura.
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Gudger bill would allow a proposed Smith Lake resort to be annexed by a ‘wet’ municipality, regardless of its location

Cullman Times 18 Apr 2025
... co-sponsored by Alabama Senate Pro Tem Garlan Gudger (R-Cullman), which would allow a proposed resort — to be located on Smith Lake — to be annexed by a wet municipality, regardless of its location.
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Nasa's Curiosity rover uncovers new clues of Mars' warm, wet history

The News International 18 Apr 2025
Nasa's Perseverance Mars rover is seen in a "selfie" that it took over a rock nicknamed "Rochette", September 10, 2021. — Reuters ... Siderite, an iron carbonate mineral, indicates that Mars once had a thick atmosphere rich in carbon dioxide ... .
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The Science Behind Why Roads Look Wet On Hot Days

Yahoo Daily News 17 Apr 2025
... curious why the roads look wet.
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Weather warning for rain as wet start to Easter bank holiday weekend expected

The Irish Times 17 Apr 2025
Heavy rain is expected across the country on Good Friday with the chance of localised flooding ... READ MORE ... .
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Fresh Rains Cool Down Kashmir Met Warns Of Wet Spell From April 18

MENA FN 17 Apr 2025
(MENAFN - Kashmir Observer) Srinagar- A day after Kashmir experienced the hottest day of the season so far, fresh showers swept across the Valley on Wednesday, bringing a sharp dip in temperatures ... .
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