Modified Kelvin Equations for Capillary Condensation in Narrow and Wide Grooves.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F18%3A00497925" target="_blank" >RIV/67985858:_____/18:00497925 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22340/18:43917724

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevLett.120.135701" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.120.135701</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.120.135701" target="_blank" >10.1103/PhysRevLett.120.135701</a>

Result language

angličtina

Original language name

Modified Kelvin Equations for Capillary Condensation in Narrow and Wide Grooves.

Original language description

We consider the location and order of capillary condensation transitions occurring in deep grooves of width L and depth D. For walls that are completely wet by liquid (contact angle theta = 0) the transition is continuous and its location is not sensitive to the depth of the groove. However, for walls that are partially wet by liquid, where the transition is first order, we show that the pressure at which it occurs is determined by a modified Kelvin equation characterized by an edge contact angle theta(E) describing the shape of the meniscus formed at the top of the groove. The dependence of theta(E) on the groove depth D relies, in turn, on whether corner menisci are formed at the bottom of the groove in the low density gaslike phase. While for macroscopically wide grooves these are always present when theta < 45 degrees we argue that their formation is inhibited in narrow grooves. This has a number of implications including that the local pinning of the meniscus and location of the condensation transition is different depending on whether the contact angle is greater or less than a universal value theta* approximate to 31 degrees. Our arguments are supported by detailed microscopic density functional theory calculations that show that the modified Kelvin equation remains highly accurate even when L and D are of the order of tens of molecular diameters.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GA17-25100S" target="_blank" >GA17-25100S: Geometrically and Chemically Modified Surfaces: From Statics to Dynamics</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review Letters

ISSN

0031-9007

e-ISSN

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Volume of the periodical

120

Issue of the periodical within the volume

13

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

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UT code for WoS article

000428394800015

EID of the result in the Scopus database

2-s2.0-85044869398